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annotate contrib/python-zstandard/tests/test_decompressor.py @ 39878:3e896b51aa5d

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storageutil: move metadata parsing and packing from revlog (API) Parsing and writing of revision text metadata is likely identical across storage backends. Let's move the code out of revlog so we don't need to import the revlog module in order to use it. Differential Revision: https://phab.mercurial-scm.org/D4754
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 24 Sep 2018 14:31:31 -0700
parents b1fb341d8a61
children 73fef626dae3
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1 import io
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2 import os
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3 import random
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4 import struct
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5 import sys
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6 import unittest
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7
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8 import zstandard as zstd
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9
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10 from .common import (
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11 generate_samples,
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12 make_cffi,
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13 OpCountingBytesIO,
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14 )
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16
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17 if sys.version_info[0] >= 3:
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18 next = lambda it: it.__next__()
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19 else:
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20 next = lambda it: it.next()
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21
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22
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23 @make_cffi
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24 class TestFrameHeaderSize(unittest.TestCase):
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25 def test_empty(self):
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26 with self.assertRaisesRegexp(
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27 zstd.ZstdError, 'could not determine frame header size: Src size '
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28 'is incorrect'):
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29 zstd.frame_header_size(b'')
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30
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31 def test_too_small(self):
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32 with self.assertRaisesRegexp(
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33 zstd.ZstdError, 'could not determine frame header size: Src size '
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34 'is incorrect'):
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35 zstd.frame_header_size(b'foob')
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36
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37 def test_basic(self):
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38 # It doesn't matter that it isn't a valid frame.
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39 self.assertEqual(zstd.frame_header_size(b'long enough but no magic'), 6)
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40
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41
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42 @make_cffi
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43 class TestFrameContentSize(unittest.TestCase):
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44 def test_empty(self):
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45 with self.assertRaisesRegexp(zstd.ZstdError,
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46 'error when determining content size'):
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47 zstd.frame_content_size(b'')
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48
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49 def test_too_small(self):
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50 with self.assertRaisesRegexp(zstd.ZstdError,
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51 'error when determining content size'):
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52 zstd.frame_content_size(b'foob')
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53
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54 def test_bad_frame(self):
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55 with self.assertRaisesRegexp(zstd.ZstdError,
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56 'error when determining content size'):
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57 zstd.frame_content_size(b'invalid frame header')
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58
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59 def test_unknown(self):
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60 cctx = zstd.ZstdCompressor(write_content_size=False)
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61 frame = cctx.compress(b'foobar')
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62
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63 self.assertEqual(zstd.frame_content_size(frame), -1)
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64
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65 def test_empty(self):
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66 cctx = zstd.ZstdCompressor()
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67 frame = cctx.compress(b'')
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68
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69 self.assertEqual(zstd.frame_content_size(frame), 0)
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70
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71 def test_basic(self):
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72 cctx = zstd.ZstdCompressor()
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73 frame = cctx.compress(b'foobar')
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74
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75 self.assertEqual(zstd.frame_content_size(frame), 6)
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76
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77
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78 @make_cffi
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79 class TestDecompressor(unittest.TestCase):
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80 def test_memory_size(self):
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81 dctx = zstd.ZstdDecompressor()
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82
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83 self.assertGreater(dctx.memory_size(), 100)
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84
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85
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86 @make_cffi
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87 class TestDecompressor_decompress(unittest.TestCase):
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88 def test_empty_input(self):
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89 dctx = zstd.ZstdDecompressor()
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90
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91 with self.assertRaisesRegexp(zstd.ZstdError, 'error determining content size from frame header'):
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92 dctx.decompress(b'')
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93
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94 def test_invalid_input(self):
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95 dctx = zstd.ZstdDecompressor()
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96
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97 with self.assertRaisesRegexp(zstd.ZstdError, 'error determining content size from frame header'):
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98 dctx.decompress(b'foobar')
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99
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100 def test_input_types(self):
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101 cctx = zstd.ZstdCompressor(level=1)
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102 compressed = cctx.compress(b'foo')
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103
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104 mutable_array = bytearray(len(compressed))
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105 mutable_array[:] = compressed
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106
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107 sources = [
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108 memoryview(compressed),
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109 bytearray(compressed),
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110 mutable_array,
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111 ]
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112
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113 dctx = zstd.ZstdDecompressor()
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114 for source in sources:
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115 self.assertEqual(dctx.decompress(source), b'foo')
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116
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117 def test_no_content_size_in_frame(self):
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118 cctx = zstd.ZstdCompressor(write_content_size=False)
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119 compressed = cctx.compress(b'foobar')
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120
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121 dctx = zstd.ZstdDecompressor()
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122 with self.assertRaisesRegexp(zstd.ZstdError, 'could not determine content size in frame header'):
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123 dctx.decompress(compressed)
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124
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125 def test_content_size_present(self):
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126 cctx = zstd.ZstdCompressor()
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127 compressed = cctx.compress(b'foobar')
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128
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129 dctx = zstd.ZstdDecompressor()
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130 decompressed = dctx.decompress(compressed)
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131 self.assertEqual(decompressed, b'foobar')
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132
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133 def test_empty_roundtrip(self):
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134 cctx = zstd.ZstdCompressor()
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135 compressed = cctx.compress(b'')
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136
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137 dctx = zstd.ZstdDecompressor()
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138 decompressed = dctx.decompress(compressed)
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139
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140 self.assertEqual(decompressed, b'')
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141
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142 def test_max_output_size(self):
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143 cctx = zstd.ZstdCompressor(write_content_size=False)
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144 source = b'foobar' * 256
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145 compressed = cctx.compress(source)
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146
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147 dctx = zstd.ZstdDecompressor()
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parents:
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148 # Will fit into buffer exactly the size of input.
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149 decompressed = dctx.decompress(compressed, max_output_size=len(source))
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150 self.assertEqual(decompressed, source)
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151
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152 # Input size - 1 fails
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153 with self.assertRaisesRegexp(zstd.ZstdError,
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154 'decompression error: did not decompress full frame'):
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155 dctx.decompress(compressed, max_output_size=len(source) - 1)
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156
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157 # Input size + 1 works
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158 decompressed = dctx.decompress(compressed, max_output_size=len(source) + 1)
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159 self.assertEqual(decompressed, source)
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160
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161 # A much larger buffer works.
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162 decompressed = dctx.decompress(compressed, max_output_size=len(source) * 64)
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parents:
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163 self.assertEqual(decompressed, source)
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164
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165 def test_stupidly_large_output_buffer(self):
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166 cctx = zstd.ZstdCompressor(write_content_size=False)
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parents:
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167 compressed = cctx.compress(b'foobar' * 256)
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168 dctx = zstd.ZstdDecompressor()
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169
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170 # Will get OverflowError on some Python distributions that can't
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parents:
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171 # handle really large integers.
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parents:
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172 with self.assertRaises((MemoryError, OverflowError)):
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173 dctx.decompress(compressed, max_output_size=2**62)
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174
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175 def test_dictionary(self):
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176 samples = []
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177 for i in range(128):
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178 samples.append(b'foo' * 64)
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179 samples.append(b'bar' * 64)
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180 samples.append(b'foobar' * 64)
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parents:
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181
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
182 d = zstd.train_dictionary(8192, samples)
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183
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diff changeset
184 orig = b'foobar' * 16384
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185 cctx = zstd.ZstdCompressor(level=1, dict_data=d)
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186 compressed = cctx.compress(orig)
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187
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diff changeset
188 dctx = zstd.ZstdDecompressor(dict_data=d)
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189 decompressed = dctx.decompress(compressed)
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190
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191 self.assertEqual(decompressed, orig)
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192
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193 def test_dictionary_multiple(self):
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194 samples = []
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195 for i in range(128):
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196 samples.append(b'foo' * 64)
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Gregory Szorc <gregory.szorc@gmail.com>
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197 samples.append(b'bar' * 64)
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Gregory Szorc <gregory.szorc@gmail.com>
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198 samples.append(b'foobar' * 64)
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199
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200 d = zstd.train_dictionary(8192, samples)
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201
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202 sources = (b'foobar' * 8192, b'foo' * 8192, b'bar' * 8192)
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203 compressed = []
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204 cctx = zstd.ZstdCompressor(level=1, dict_data=d)
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205 for source in sources:
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206 compressed.append(cctx.compress(source))
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207
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208 dctx = zstd.ZstdDecompressor(dict_data=d)
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209 for i in range(len(sources)):
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
210 decompressed = dctx.decompress(compressed[i])
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diff changeset
211 self.assertEqual(decompressed, sources[i])
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212
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diff changeset
213 def test_max_window_size(self):
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parents: 31796
diff changeset
214 with open(__file__, 'rb') as fh:
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parents: 31796
diff changeset
215 source = fh.read()
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
216
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
217 # If we write a content size, the decompressor engages single pass
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
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218 # mode and the window size doesn't come into play.
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parents: 31796
diff changeset
219 cctx = zstd.ZstdCompressor(write_content_size=False)
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
220 frame = cctx.compress(source)
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
221
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parents: 31796
diff changeset
222 dctx = zstd.ZstdDecompressor(max_window_size=1)
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parents: 31796
diff changeset
223
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
224 with self.assertRaisesRegexp(
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
225 zstd.ZstdError, 'decompression error: Frame requires too much memory'):
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parents: 31796
diff changeset
226 dctx.decompress(frame, max_output_size=len(source))
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227
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228
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diff changeset
229 @make_cffi
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parents:
diff changeset
230 class TestDecompressor_copy_stream(unittest.TestCase):
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parents:
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231 def test_no_read(self):
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Gregory Szorc <gregory.szorc@gmail.com>
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diff changeset
232 source = object()
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Gregory Szorc <gregory.szorc@gmail.com>
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233 dest = io.BytesIO()
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Gregory Szorc <gregory.szorc@gmail.com>
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234
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
235 dctx = zstd.ZstdDecompressor()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
236 with self.assertRaises(ValueError):
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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237 dctx.copy_stream(source, dest)
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238
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
239 def test_no_write(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
240 source = io.BytesIO()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
241 dest = object()
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parents:
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242
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
243 dctx = zstd.ZstdDecompressor()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
244 with self.assertRaises(ValueError):
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
245 dctx.copy_stream(source, dest)
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
246
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
247 def test_empty(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
248 source = io.BytesIO()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
249 dest = io.BytesIO()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
250
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
251 dctx = zstd.ZstdDecompressor()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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252 # TODO should this raise an error?
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parents:
diff changeset
253 r, w = dctx.copy_stream(source, dest)
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parents:
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254
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
255 self.assertEqual(r, 0)
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
256 self.assertEqual(w, 0)
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
257 self.assertEqual(dest.getvalue(), b'')
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parents:
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258
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
259 def test_large_data(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
260 source = io.BytesIO()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
261 for i in range(255):
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
262 source.write(struct.Struct('>B').pack(i) * 16384)
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
263 source.seek(0)
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parents:
diff changeset
264
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
265 compressed = io.BytesIO()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
266 cctx = zstd.ZstdCompressor()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
267 cctx.copy_stream(source, compressed)
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
268
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
269 compressed.seek(0)
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
270 dest = io.BytesIO()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
271 dctx = zstd.ZstdDecompressor()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
272 r, w = dctx.copy_stream(compressed, dest)
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
273
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
274 self.assertEqual(r, len(compressed.getvalue()))
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
275 self.assertEqual(w, len(source.getvalue()))
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
276
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
277 def test_read_write_size(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
278 source = OpCountingBytesIO(zstd.ZstdCompressor().compress(
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
279 b'foobarfoobar'))
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
280
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
281 dest = OpCountingBytesIO()
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
282 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
283 r, w = dctx.copy_stream(source, dest, read_size=1, write_size=1)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
284
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
285 self.assertEqual(r, len(source.getvalue()))
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
286 self.assertEqual(w, len(b'foobarfoobar'))
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
287 self.assertEqual(source._read_count, len(source.getvalue()) + 1)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
288 self.assertEqual(dest._write_count, len(dest.getvalue()))
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
289
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
290
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
291 @make_cffi
37495
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
292 class TestDecompressor_stream_reader(unittest.TestCase):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
293 def test_context_manager(self):
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
294 dctx = zstd.ZstdDecompressor()
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
295
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
296 reader = dctx.stream_reader(b'foo')
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
297 with self.assertRaisesRegexp(zstd.ZstdError, 'read\(\) must be called from an active'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
298 reader.read(1)
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
299
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
300 with dctx.stream_reader(b'foo') as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
301 with self.assertRaisesRegexp(ValueError, 'cannot __enter__ multiple times'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
302 with reader as reader2:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
303 pass
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
304
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
305 def test_not_implemented(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
306 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
307
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
308 with dctx.stream_reader(b'foo') as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
309 with self.assertRaises(NotImplementedError):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
310 reader.readline()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
311
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
312 with self.assertRaises(NotImplementedError):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
313 reader.readlines()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
314
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
315 with self.assertRaises(NotImplementedError):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
316 reader.readall()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
317
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
318 with self.assertRaises(NotImplementedError):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
319 iter(reader)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
320
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
321 with self.assertRaises(NotImplementedError):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
322 next(reader)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
323
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
324 with self.assertRaises(io.UnsupportedOperation):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
325 reader.write(b'foo')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
326
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
327 with self.assertRaises(io.UnsupportedOperation):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
328 reader.writelines([])
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
329
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
330 def test_constant_methods(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
331 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
332
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
333 with dctx.stream_reader(b'foo') as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
334 self.assertTrue(reader.readable())
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
335 self.assertFalse(reader.writable())
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
336 self.assertTrue(reader.seekable())
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
337 self.assertFalse(reader.isatty())
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
338 self.assertIsNone(reader.flush())
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
339
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
340 def test_read_closed(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
341 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
342
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
343 with dctx.stream_reader(b'foo') as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
344 reader.close()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
345 with self.assertRaisesRegexp(ValueError, 'stream is closed'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
346 reader.read(1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
347
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
348 def test_bad_read_size(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
349 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
350
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
351 with dctx.stream_reader(b'foo') as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
352 with self.assertRaisesRegexp(ValueError, 'cannot read negative or size 0 amounts'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
353 reader.read(-1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
354
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
355 with self.assertRaisesRegexp(ValueError, 'cannot read negative or size 0 amounts'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
356 reader.read(0)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
357
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
358 def test_read_buffer(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
359 cctx = zstd.ZstdCompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
360
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
361 source = b''.join([b'foo' * 60, b'bar' * 60, b'baz' * 60])
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
362 frame = cctx.compress(source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
363
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
364 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
365
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
366 with dctx.stream_reader(frame) as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
367 self.assertEqual(reader.tell(), 0)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
368
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
369 # We should get entire frame in one read.
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
370 result = reader.read(8192)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
371 self.assertEqual(result, source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
372 self.assertEqual(reader.tell(), len(source))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
373
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
374 # Read after EOF should return empty bytes.
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
375 self.assertEqual(reader.read(), b'')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
376 self.assertEqual(reader.tell(), len(result))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
377
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
378 self.assertTrue(reader.closed())
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
379
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
380 def test_read_buffer_small_chunks(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
381 cctx = zstd.ZstdCompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
382 source = b''.join([b'foo' * 60, b'bar' * 60, b'baz' * 60])
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
383 frame = cctx.compress(source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
384
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
385 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
386 chunks = []
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
387
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
388 with dctx.stream_reader(frame, read_size=1) as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
389 while True:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
390 chunk = reader.read(1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
391 if not chunk:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
392 break
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
393
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
394 chunks.append(chunk)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
395 self.assertEqual(reader.tell(), sum(map(len, chunks)))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
396
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
397 self.assertEqual(b''.join(chunks), source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
398
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
399 def test_read_stream(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
400 cctx = zstd.ZstdCompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
401 source = b''.join([b'foo' * 60, b'bar' * 60, b'baz' * 60])
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
402 frame = cctx.compress(source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
403
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
404 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
405 with dctx.stream_reader(io.BytesIO(frame)) as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
406 self.assertEqual(reader.tell(), 0)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
407
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
408 chunk = reader.read(8192)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
409 self.assertEqual(chunk, source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
410 self.assertEqual(reader.tell(), len(source))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
411 self.assertEqual(reader.read(), b'')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
412 self.assertEqual(reader.tell(), len(source))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
413
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
414 def test_read_stream_small_chunks(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
415 cctx = zstd.ZstdCompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
416 source = b''.join([b'foo' * 60, b'bar' * 60, b'baz' * 60])
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
417 frame = cctx.compress(source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
418
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
419 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
420 chunks = []
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
421
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
422 with dctx.stream_reader(io.BytesIO(frame), read_size=1) as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
423 while True:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
424 chunk = reader.read(1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
425 if not chunk:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
426 break
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
427
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
428 chunks.append(chunk)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
429 self.assertEqual(reader.tell(), sum(map(len, chunks)))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
430
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
431 self.assertEqual(b''.join(chunks), source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
432
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
433 def test_read_after_exit(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
434 cctx = zstd.ZstdCompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
435 frame = cctx.compress(b'foo' * 60)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
436
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
437 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
438
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
439 with dctx.stream_reader(frame) as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
440 while reader.read(16):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
441 pass
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
442
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
443 with self.assertRaisesRegexp(zstd.ZstdError, 'read\(\) must be called from an active'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
444 reader.read(10)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
445
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
446 def test_illegal_seeks(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
447 cctx = zstd.ZstdCompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
448 frame = cctx.compress(b'foo' * 60)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
449
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
450 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
451
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
452 with dctx.stream_reader(frame) as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
453 with self.assertRaisesRegexp(ValueError,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
454 'cannot seek to negative position'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
455 reader.seek(-1, os.SEEK_SET)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
456
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
457 reader.read(1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
458
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
459 with self.assertRaisesRegexp(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
460 ValueError, 'cannot seek zstd decompression stream backwards'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
461 reader.seek(0, os.SEEK_SET)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
462
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
463 with self.assertRaisesRegexp(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
464 ValueError, 'cannot seek zstd decompression stream backwards'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
465 reader.seek(-1, os.SEEK_CUR)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
466
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
467 with self.assertRaisesRegexp(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
468 ValueError,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
469 'zstd decompression streams cannot be seeked with SEEK_END'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
470 reader.seek(0, os.SEEK_END)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
471
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
472 reader.close()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
473
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
474 with self.assertRaisesRegexp(ValueError, 'stream is closed'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
475 reader.seek(4, os.SEEK_SET)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
476
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
477 with self.assertRaisesRegexp(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
478 zstd.ZstdError, 'seek\(\) must be called from an active context'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
479 reader.seek(0)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
480
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
481 def test_seek(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
482 source = b'foobar' * 60
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
483 cctx = zstd.ZstdCompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
484 frame = cctx.compress(source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
485
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
486 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
487
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
488 with dctx.stream_reader(frame) as reader:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
489 reader.seek(3)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
490 self.assertEqual(reader.read(3), b'bar')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
491
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
492 reader.seek(4, os.SEEK_CUR)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
493 self.assertEqual(reader.read(2), b'ar')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
494
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
496 @make_cffi
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
497 class TestDecompressor_decompressobj(unittest.TestCase):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
498 def test_simple(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
499 data = zstd.ZstdCompressor(level=1).compress(b'foobar')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
500
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
501 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
502 dobj = dctx.decompressobj()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
503 self.assertEqual(dobj.decompress(data), b'foobar')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
504
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
505 def test_input_types(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
506 compressed = zstd.ZstdCompressor(level=1).compress(b'foo')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
507
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
508 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
509
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
510 mutable_array = bytearray(len(compressed))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
511 mutable_array[:] = compressed
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
512
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
513 sources = [
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
514 memoryview(compressed),
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
515 bytearray(compressed),
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
516 mutable_array,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
517 ]
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
518
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
519 for source in sources:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
520 dobj = dctx.decompressobj()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
521 self.assertEqual(dobj.decompress(source), b'foo')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
522
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
523 def test_reuse(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
524 data = zstd.ZstdCompressor(level=1).compress(b'foobar')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
525
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
526 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
527 dobj = dctx.decompressobj()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
528 dobj.decompress(data)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
529
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
530 with self.assertRaisesRegexp(zstd.ZstdError, 'cannot use a decompressobj'):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
531 dobj.decompress(data)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
532
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
533 def test_bad_write_size(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
534 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
535
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
536 with self.assertRaisesRegexp(ValueError, 'write_size must be positive'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
537 dctx.decompressobj(write_size=0)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
538
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
539 def test_write_size(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
540 source = b'foo' * 64 + b'bar' * 128
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
541 data = zstd.ZstdCompressor(level=1).compress(source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
542
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
543 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
544
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
545 for i in range(128):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
546 dobj = dctx.decompressobj(write_size=i + 1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
547 self.assertEqual(dobj.decompress(data), source)
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
548
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
549 def decompress_via_writer(data):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
550 buffer = io.BytesIO()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
551 dctx = zstd.ZstdDecompressor()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
552 with dctx.stream_writer(buffer) as decompressor:
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
553 decompressor.write(data)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
554 return buffer.getvalue()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
555
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
556
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
557 @make_cffi
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
558 class TestDecompressor_stream_writer(unittest.TestCase):
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
559 def test_empty_roundtrip(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
560 cctx = zstd.ZstdCompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
561 empty = cctx.compress(b'')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
562 self.assertEqual(decompress_via_writer(empty), b'')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
563
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
564 def test_input_types(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
565 cctx = zstd.ZstdCompressor(level=1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
566 compressed = cctx.compress(b'foo')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
567
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
568 mutable_array = bytearray(len(compressed))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
569 mutable_array[:] = compressed
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
570
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
571 sources = [
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
572 memoryview(compressed),
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
573 bytearray(compressed),
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
574 mutable_array,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
575 ]
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
576
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
577 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
578 for source in sources:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
579 buffer = io.BytesIO()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
580 with dctx.stream_writer(buffer) as decompressor:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
581 decompressor.write(source)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
582
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
583 self.assertEqual(buffer.getvalue(), b'foo')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
584
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
585 def test_large_roundtrip(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
586 chunks = []
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
587 for i in range(255):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
588 chunks.append(struct.Struct('>B').pack(i) * 16384)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
589 orig = b''.join(chunks)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
590 cctx = zstd.ZstdCompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
591 compressed = cctx.compress(orig)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
592
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
593 self.assertEqual(decompress_via_writer(compressed), orig)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
594
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
595 def test_multiple_calls(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
596 chunks = []
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
597 for i in range(255):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
598 for j in range(255):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
599 chunks.append(struct.Struct('>B').pack(j) * i)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
600
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
601 orig = b''.join(chunks)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
602 cctx = zstd.ZstdCompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
603 compressed = cctx.compress(orig)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
604
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
605 buffer = io.BytesIO()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
606 dctx = zstd.ZstdDecompressor()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
607 with dctx.stream_writer(buffer) as decompressor:
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
608 pos = 0
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
609 while pos < len(compressed):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
610 pos2 = pos + 8192
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
611 decompressor.write(compressed[pos:pos2])
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
612 pos += 8192
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
613 self.assertEqual(buffer.getvalue(), orig)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
614
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
615 def test_dictionary(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
616 samples = []
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
617 for i in range(128):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
618 samples.append(b'foo' * 64)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
619 samples.append(b'bar' * 64)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
620 samples.append(b'foobar' * 64)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
621
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
622 d = zstd.train_dictionary(8192, samples)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
623
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
624 orig = b'foobar' * 16384
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
625 buffer = io.BytesIO()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
626 cctx = zstd.ZstdCompressor(dict_data=d)
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
627 with cctx.stream_writer(buffer) as compressor:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
628 self.assertEqual(compressor.write(orig), 0)
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
629
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
630 compressed = buffer.getvalue()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
631 buffer = io.BytesIO()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
632
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
633 dctx = zstd.ZstdDecompressor(dict_data=d)
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
634 with dctx.stream_writer(buffer) as decompressor:
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
635 self.assertEqual(decompressor.write(compressed), len(orig))
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
636
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
637 self.assertEqual(buffer.getvalue(), orig)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
638
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
639 def test_memory_size(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
640 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
641 buffer = io.BytesIO()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
642 with dctx.stream_writer(buffer) as decompressor:
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
643 size = decompressor.memory_size()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
644
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
645 self.assertGreater(size, 100000)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
646
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
647 def test_write_size(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
648 source = zstd.ZstdCompressor().compress(b'foobarfoobar')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
649 dest = OpCountingBytesIO()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
650 dctx = zstd.ZstdDecompressor()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
651 with dctx.stream_writer(dest, write_size=1) as decompressor:
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
652 s = struct.Struct('>B')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
653 for c in source:
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
654 if not isinstance(c, str):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
655 c = s.pack(c)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
656 decompressor.write(c)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
657
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
658 self.assertEqual(dest.getvalue(), b'foobarfoobar')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
659 self.assertEqual(dest._write_count, len(dest.getvalue()))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
660
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
661
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
662 @make_cffi
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
663 class TestDecompressor_read_to_iter(unittest.TestCase):
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
664 def test_type_validation(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
665 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
666
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
667 # Object with read() works.
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
668 dctx.read_to_iter(io.BytesIO())
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
669
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
670 # Buffer protocol works.
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
671 dctx.read_to_iter(b'foobar')
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
672
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
673 with self.assertRaisesRegexp(ValueError, 'must pass an object with a read'):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
674 b''.join(dctx.read_to_iter(True))
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
675
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
676 def test_empty_input(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
677 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
678
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
679 source = io.BytesIO()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
680 it = dctx.read_to_iter(source)
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
681 # TODO this is arguably wrong. Should get an error about missing frame foo.
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
682 with self.assertRaises(StopIteration):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
683 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
684
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
685 it = dctx.read_to_iter(b'')
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
686 with self.assertRaises(StopIteration):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
687 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
688
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
689 def test_invalid_input(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
690 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
691
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
692 source = io.BytesIO(b'foobar')
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
693 it = dctx.read_to_iter(source)
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
694 with self.assertRaisesRegexp(zstd.ZstdError, 'Unknown frame descriptor'):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
695 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
696
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
697 it = dctx.read_to_iter(b'foobar')
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
698 with self.assertRaisesRegexp(zstd.ZstdError, 'Unknown frame descriptor'):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
699 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
700
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
701 def test_empty_roundtrip(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
702 cctx = zstd.ZstdCompressor(level=1, write_content_size=False)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
703 empty = cctx.compress(b'')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
704
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
705 source = io.BytesIO(empty)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
706 source.seek(0)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
707
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
708 dctx = zstd.ZstdDecompressor()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
709 it = dctx.read_to_iter(source)
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
710
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
711 # No chunks should be emitted since there is no data.
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
712 with self.assertRaises(StopIteration):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
713 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
714
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
715 # Again for good measure.
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
716 with self.assertRaises(StopIteration):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
717 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
718
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
719 def test_skip_bytes_too_large(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
720 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
721
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
722 with self.assertRaisesRegexp(ValueError, 'skip_bytes must be smaller than read_size'):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
723 b''.join(dctx.read_to_iter(b'', skip_bytes=1, read_size=1))
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
724
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
725 with self.assertRaisesRegexp(ValueError, 'skip_bytes larger than first input chunk'):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
726 b''.join(dctx.read_to_iter(b'foobar', skip_bytes=10))
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
727
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
728 def test_skip_bytes(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
729 cctx = zstd.ZstdCompressor(write_content_size=False)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
730 compressed = cctx.compress(b'foobar')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
731
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
732 dctx = zstd.ZstdDecompressor()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
733 output = b''.join(dctx.read_to_iter(b'hdr' + compressed, skip_bytes=3))
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
734 self.assertEqual(output, b'foobar')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
735
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
736 def test_large_output(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
737 source = io.BytesIO()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
738 source.write(b'f' * zstd.DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
739 source.write(b'o')
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
740 source.seek(0)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
741
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
742 cctx = zstd.ZstdCompressor(level=1)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
743 compressed = io.BytesIO(cctx.compress(source.getvalue()))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
744 compressed.seek(0)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
745
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
746 dctx = zstd.ZstdDecompressor()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
747 it = dctx.read_to_iter(compressed)
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
748
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
749 chunks = []
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
750 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
751 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
752
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
753 with self.assertRaises(StopIteration):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
754 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
755
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
756 decompressed = b''.join(chunks)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
757 self.assertEqual(decompressed, source.getvalue())
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
758
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
759 # And again with buffer protocol.
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
760 it = dctx.read_to_iter(compressed.getvalue())
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
761 chunks = []
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
762 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
763 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
764
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
765 with self.assertRaises(StopIteration):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
766 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
767
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
768 decompressed = b''.join(chunks)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
769 self.assertEqual(decompressed, source.getvalue())
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
770
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
771 @unittest.skipUnless('ZSTD_SLOW_TESTS' in os.environ, 'ZSTD_SLOW_TESTS not set')
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
772 def test_large_input(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
773 bytes = list(struct.Struct('>B').pack(i) for i in range(256))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
774 compressed = io.BytesIO()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
775 input_size = 0
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
776 cctx = zstd.ZstdCompressor(level=1)
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
777 with cctx.stream_writer(compressed) as compressor:
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
778 while True:
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
779 compressor.write(random.choice(bytes))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
780 input_size += 1
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
781
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
782 have_compressed = len(compressed.getvalue()) > zstd.DECOMPRESSION_RECOMMENDED_INPUT_SIZE
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
783 have_raw = input_size > zstd.DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE * 2
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
784 if have_compressed and have_raw:
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
785 break
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
786
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
787 compressed.seek(0)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
788 self.assertGreater(len(compressed.getvalue()),
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
789 zstd.DECOMPRESSION_RECOMMENDED_INPUT_SIZE)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
790
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
791 dctx = zstd.ZstdDecompressor()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
792 it = dctx.read_to_iter(compressed)
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
793
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
794 chunks = []
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
795 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
796 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
797 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
798
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
799 with self.assertRaises(StopIteration):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
800 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
801
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
802 decompressed = b''.join(chunks)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
803 self.assertEqual(len(decompressed), input_size)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
804
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
805 # And again with buffer protocol.
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
806 it = dctx.read_to_iter(compressed.getvalue())
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
807
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
808 chunks = []
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
809 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
810 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
811 chunks.append(next(it))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
812
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
813 with self.assertRaises(StopIteration):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
814 next(it)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
815
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
816 decompressed = b''.join(chunks)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
817 self.assertEqual(len(decompressed), input_size)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
818
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
819 def test_interesting(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
820 # Found this edge case via fuzzing.
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
821 cctx = zstd.ZstdCompressor(level=1)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
822
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
823 source = io.BytesIO()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
824
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
825 compressed = io.BytesIO()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
826 with cctx.stream_writer(compressed) as compressor:
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
827 for i in range(256):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
828 chunk = b'\0' * 1024
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
829 compressor.write(chunk)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
830 source.write(chunk)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
831
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
832 dctx = zstd.ZstdDecompressor()
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
833
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
834 simple = dctx.decompress(compressed.getvalue(),
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
835 max_output_size=len(source.getvalue()))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
836 self.assertEqual(simple, source.getvalue())
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
837
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
838 compressed.seek(0)
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
839 streamed = b''.join(dctx.read_to_iter(compressed))
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
840 self.assertEqual(streamed, source.getvalue())
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
841
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
842 def test_read_write_size(self):
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
843 source = OpCountingBytesIO(zstd.ZstdCompressor().compress(b'foobarfoobar'))
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
844 dctx = zstd.ZstdDecompressor()
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
845 for chunk in dctx.read_to_iter(source, read_size=1, write_size=1):
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
846 self.assertEqual(len(chunk), 1)
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
847
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
848 self.assertEqual(source._read_count, len(source.getvalue()))
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
849
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
850 def test_magic_less(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
851 params = zstd.CompressionParameters.from_level(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
852 1, format=zstd.FORMAT_ZSTD1_MAGICLESS)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
853 cctx = zstd.ZstdCompressor(compression_params=params)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
854 frame = cctx.compress(b'foobar')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
855
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
856 self.assertNotEqual(frame[0:4], b'\x28\xb5\x2f\xfd')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
857
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
858 dctx = zstd.ZstdDecompressor()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
859 with self.assertRaisesRegexp(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
860 zstd.ZstdError, 'error determining content size from frame header'):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
861 dctx.decompress(frame)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
862
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
863 dctx = zstd.ZstdDecompressor(format=zstd.FORMAT_ZSTD1_MAGICLESS)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
864 res = b''.join(dctx.read_to_iter(frame))
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
865 self.assertEqual(res, b'foobar')
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
866
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
867
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
868 @make_cffi
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
869 class TestDecompressor_content_dict_chain(unittest.TestCase):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
870 def test_bad_inputs_simple(self):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
871 dctx = zstd.ZstdDecompressor()
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
872
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
873 with self.assertRaises(TypeError):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
874 dctx.decompress_content_dict_chain(b'foo')
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
875
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
876 with self.assertRaises(TypeError):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
877 dctx.decompress_content_dict_chain((b'foo', b'bar'))
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
878
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
879 with self.assertRaisesRegexp(ValueError, 'empty input chain'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
880 dctx.decompress_content_dict_chain([])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
881
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
882 with self.assertRaisesRegexp(ValueError, 'chunk 0 must be bytes'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
883 dctx.decompress_content_dict_chain([u'foo'])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
884
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
885 with self.assertRaisesRegexp(ValueError, 'chunk 0 must be bytes'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
886 dctx.decompress_content_dict_chain([True])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
887
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
888 with self.assertRaisesRegexp(ValueError, 'chunk 0 is too small to contain a zstd frame'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
889 dctx.decompress_content_dict_chain([zstd.FRAME_HEADER])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
890
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
891 with self.assertRaisesRegexp(ValueError, 'chunk 0 is not a valid zstd frame'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
892 dctx.decompress_content_dict_chain([b'foo' * 8])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
893
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
894 no_size = zstd.ZstdCompressor(write_content_size=False).compress(b'foo' * 64)
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
896 with self.assertRaisesRegexp(ValueError, 'chunk 0 missing content size in frame'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
897 dctx.decompress_content_dict_chain([no_size])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
898
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
899 # Corrupt first frame.
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
900 frame = zstd.ZstdCompressor().compress(b'foo' * 64)
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
901 frame = frame[0:12] + frame[15:]
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
902 with self.assertRaisesRegexp(zstd.ZstdError,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
903 'chunk 0 did not decompress full frame'):
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
904 dctx.decompress_content_dict_chain([frame])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
905
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
906 def test_bad_subsequent_input(self):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
907 initial = zstd.ZstdCompressor().compress(b'foo' * 64)
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
908
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
909 dctx = zstd.ZstdDecompressor()
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
910
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
911 with self.assertRaisesRegexp(ValueError, 'chunk 1 must be bytes'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
912 dctx.decompress_content_dict_chain([initial, u'foo'])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
913
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
914 with self.assertRaisesRegexp(ValueError, 'chunk 1 must be bytes'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
915 dctx.decompress_content_dict_chain([initial, None])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
916
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
917 with self.assertRaisesRegexp(ValueError, 'chunk 1 is too small to contain a zstd frame'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
918 dctx.decompress_content_dict_chain([initial, zstd.FRAME_HEADER])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
919
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
920 with self.assertRaisesRegexp(ValueError, 'chunk 1 is not a valid zstd frame'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
921 dctx.decompress_content_dict_chain([initial, b'foo' * 8])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
922
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
923 no_size = zstd.ZstdCompressor(write_content_size=False).compress(b'foo' * 64)
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
924
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
925 with self.assertRaisesRegexp(ValueError, 'chunk 1 missing content size in frame'):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
926 dctx.decompress_content_dict_chain([initial, no_size])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
927
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
928 # Corrupt second frame.
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
929 cctx = zstd.ZstdCompressor(dict_data=zstd.ZstdCompressionDict(b'foo' * 64))
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
930 frame = cctx.compress(b'bar' * 64)
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
931 frame = frame[0:12] + frame[15:]
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
932
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
933 with self.assertRaisesRegexp(zstd.ZstdError, 'chunk 1 did not decompress full frame'):
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
934 dctx.decompress_content_dict_chain([initial, frame])
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
935
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
936 def test_simple(self):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
937 original = [
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
938 b'foo' * 64,
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
939 b'foobar' * 64,
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
940 b'baz' * 64,
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
941 b'foobaz' * 64,
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
942 b'foobarbaz' * 64,
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
943 ]
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
944
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
945 chunks = []
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
946 chunks.append(zstd.ZstdCompressor().compress(original[0]))
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
947 for i, chunk in enumerate(original[1:]):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
948 d = zstd.ZstdCompressionDict(original[i])
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
949 cctx = zstd.ZstdCompressor(dict_data=d)
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
950 chunks.append(cctx.compress(chunk))
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
951
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
952 for i in range(1, len(original)):
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
953 chain = chunks[0:i]
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
954 expected = original[i - 1]
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
955 dctx = zstd.ZstdDecompressor()
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
956 decompressed = dctx.decompress_content_dict_chain(chain)
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
957 self.assertEqual(decompressed, expected)
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
958
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
959
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
960 # TODO enable for CFFI
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
961 class TestDecompressor_multi_decompress_to_buffer(unittest.TestCase):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
962 def test_invalid_inputs(self):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
963 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
964
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
965 with self.assertRaises(TypeError):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
966 dctx.multi_decompress_to_buffer(True)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
967
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
968 with self.assertRaises(TypeError):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
969 dctx.multi_decompress_to_buffer((1, 2))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
970
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
971 with self.assertRaisesRegexp(TypeError, 'item 0 not a bytes like object'):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
972 dctx.multi_decompress_to_buffer([u'foo'])
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
973
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
974 with self.assertRaisesRegexp(ValueError, 'could not determine decompressed size of item 0'):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
975 dctx.multi_decompress_to_buffer([b'foobarbaz'])
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
976
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
977 def test_list_input(self):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
978 cctx = zstd.ZstdCompressor()
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
979
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
980 original = [b'foo' * 4, b'bar' * 6]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
981 frames = [cctx.compress(d) for d in original]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
982
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
983 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
984 result = dctx.multi_decompress_to_buffer(frames)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
985
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
986 self.assertEqual(len(result), len(frames))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
987 self.assertEqual(result.size(), sum(map(len, original)))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
988
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
989 for i, data in enumerate(original):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
990 self.assertEqual(result[i].tobytes(), data)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
991
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
992 self.assertEqual(result[0].offset, 0)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
993 self.assertEqual(len(result[0]), 12)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
994 self.assertEqual(result[1].offset, 12)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
995 self.assertEqual(len(result[1]), 18)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
996
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
997 def test_list_input_frame_sizes(self):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
998 cctx = zstd.ZstdCompressor()
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
999
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1000 original = [b'foo' * 4, b'bar' * 6, b'baz' * 8]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1001 frames = [cctx.compress(d) for d in original]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1002 sizes = struct.pack('=' + 'Q' * len(original), *map(len, original))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1003
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1004 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1005 result = dctx.multi_decompress_to_buffer(frames, decompressed_sizes=sizes)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1006
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1007 self.assertEqual(len(result), len(frames))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1008 self.assertEqual(result.size(), sum(map(len, original)))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1009
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1010 for i, data in enumerate(original):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1011 self.assertEqual(result[i].tobytes(), data)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1012
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1013 def test_buffer_with_segments_input(self):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1014 cctx = zstd.ZstdCompressor()
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1015
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1016 original = [b'foo' * 4, b'bar' * 6]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1017 frames = [cctx.compress(d) for d in original]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1018
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1019 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1020
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1021 segments = struct.pack('=QQQQ', 0, len(frames[0]), len(frames[0]), len(frames[1]))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1022 b = zstd.BufferWithSegments(b''.join(frames), segments)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1023
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1024 result = dctx.multi_decompress_to_buffer(b)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1025
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1026 self.assertEqual(len(result), len(frames))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1027 self.assertEqual(result[0].offset, 0)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1028 self.assertEqual(len(result[0]), 12)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1029 self.assertEqual(result[1].offset, 12)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1030 self.assertEqual(len(result[1]), 18)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1031
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1032 def test_buffer_with_segments_sizes(self):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1033 cctx = zstd.ZstdCompressor(write_content_size=False)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1034 original = [b'foo' * 4, b'bar' * 6, b'baz' * 8]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1035 frames = [cctx.compress(d) for d in original]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1036 sizes = struct.pack('=' + 'Q' * len(original), *map(len, original))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1037
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1038 segments = struct.pack('=QQQQQQ', 0, len(frames[0]),
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1039 len(frames[0]), len(frames[1]),
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1040 len(frames[0]) + len(frames[1]), len(frames[2]))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1041 b = zstd.BufferWithSegments(b''.join(frames), segments)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1042
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1043 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1044 result = dctx.multi_decompress_to_buffer(b, decompressed_sizes=sizes)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1045
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1046 self.assertEqual(len(result), len(frames))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1047 self.assertEqual(result.size(), sum(map(len, original)))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1048
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1049 for i, data in enumerate(original):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1050 self.assertEqual(result[i].tobytes(), data)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1051
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1052 def test_buffer_with_segments_collection_input(self):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1053 cctx = zstd.ZstdCompressor()
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1054
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1055 original = [
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1056 b'foo0' * 2,
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1057 b'foo1' * 3,
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1058 b'foo2' * 4,
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1059 b'foo3' * 5,
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1060 b'foo4' * 6,
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1061 ]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1062
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1063 frames = cctx.multi_compress_to_buffer(original)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1064
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1065 # Check round trip.
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1066 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1067 decompressed = dctx.multi_decompress_to_buffer(frames, threads=3)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1068
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1069 self.assertEqual(len(decompressed), len(original))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1070
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1071 for i, data in enumerate(original):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1072 self.assertEqual(data, decompressed[i].tobytes())
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1073
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1074 # And a manual mode.
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1075 b = b''.join([frames[0].tobytes(), frames[1].tobytes()])
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1076 b1 = zstd.BufferWithSegments(b, struct.pack('=QQQQ',
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1077 0, len(frames[0]),
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1078 len(frames[0]), len(frames[1])))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1079
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1080 b = b''.join([frames[2].tobytes(), frames[3].tobytes(), frames[4].tobytes()])
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1081 b2 = zstd.BufferWithSegments(b, struct.pack('=QQQQQQ',
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1082 0, len(frames[2]),
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1083 len(frames[2]), len(frames[3]),
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1084 len(frames[2]) + len(frames[3]), len(frames[4])))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1085
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1086 c = zstd.BufferWithSegmentsCollection(b1, b2)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1087
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1088 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1089 decompressed = dctx.multi_decompress_to_buffer(c)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1090
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1091 self.assertEqual(len(decompressed), 5)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1092 for i in range(5):
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1093 self.assertEqual(decompressed[i].tobytes(), original[i])
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1094
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1095 def test_dict(self):
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1096 d = zstd.train_dictionary(16384, generate_samples(), k=64, d=16)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1097
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1098 cctx = zstd.ZstdCompressor(dict_data=d, level=1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1099 frames = [cctx.compress(s) for s in generate_samples()]
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1100
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1101 dctx = zstd.ZstdDecompressor(dict_data=d)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1102 result = dctx.multi_decompress_to_buffer(frames)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1103 self.assertEqual([o.tobytes() for o in result], generate_samples())
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1104
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1105 def test_multiple_threads(self):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1106 cctx = zstd.ZstdCompressor()
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1107
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1108 frames = []
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1109 frames.extend(cctx.compress(b'x' * 64) for i in range(256))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1110 frames.extend(cctx.compress(b'y' * 64) for i in range(256))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1111
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1112 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1113 result = dctx.multi_decompress_to_buffer(frames, threads=-1)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1114
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1115 self.assertEqual(len(result), len(frames))
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1116 self.assertEqual(result.size(), 2 * 64 * 256)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1117 self.assertEqual(result[0].tobytes(), b'x' * 64)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1118 self.assertEqual(result[256].tobytes(), b'y' * 64)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1119
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1120 def test_item_failure(self):
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1121 cctx = zstd.ZstdCompressor()
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1122 frames = [cctx.compress(b'x' * 128), cctx.compress(b'y' * 128)]
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1123
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1124 frames[1] = frames[1][0:15] + b'extra' + frames[1][15:]
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1125
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1126 dctx = zstd.ZstdDecompressor()
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1127
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1128 with self.assertRaisesRegexp(zstd.ZstdError,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1129 'error decompressing item 1: ('
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1130 'Corrupted block|'
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1131 'Destination buffer is too small)'):
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1132 dctx.multi_decompress_to_buffer(frames)
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1133
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1134 with self.assertRaisesRegexp(zstd.ZstdError,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1135 'error decompressing item 1: ('
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1136 'Corrupted block|'
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1137 'Destination buffer is too small)'):
31796
e0dc40530c5a zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30895
diff changeset
1138 dctx.multi_decompress_to_buffer(frames, threads=2)
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
1139