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annotate contrib/python-zstandard/tests/test_buffer_util.py @ 42070:675775c33ab6

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zstandard: vendor python-zstandard 0.11 The upstream source distribution from PyPI was extracted. Unwanted files were removed. The clang-format ignore list was updated to reflect the new source of files. The project contains a vendored copy of zstandard 1.3.8. The old version was 1.3.6. This should result in some minor performance wins. test-check-py3-compat.t was updated to reflect now-passing tests on Python 3.8. Some HTTP tests were updated to reflect new zstd compression output. # no-check-commit because 3rd party code has different style guidelines Differential Revision: https://phab.mercurial-scm.org/D6199
author Gregory Szorc <gregory.szorc@gmail.com>
date Thu, 04 Apr 2019 17:34:43 -0700
parents b1fb341d8a61
children de7838053207
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1 import struct
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2 import unittest
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3
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4 import zstandard as zstd
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5
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6 ss = struct.Struct('=QQ')
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7
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8
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9 class TestBufferWithSegments(unittest.TestCase):
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10 def test_arguments(self):
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11 if not hasattr(zstd, 'BufferWithSegments'):
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12 self.skipTest('BufferWithSegments not available')
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13
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14 with self.assertRaises(TypeError):
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15 zstd.BufferWithSegments()
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16
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17 with self.assertRaises(TypeError):
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18 zstd.BufferWithSegments(b'foo')
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19
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20 # Segments data should be a multiple of 16.
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21 with self.assertRaisesRegexp(ValueError, 'segments array size is not a multiple of 16'):
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22 zstd.BufferWithSegments(b'foo', b'\x00\x00')
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23
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24 def test_invalid_offset(self):
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25 if not hasattr(zstd, 'BufferWithSegments'):
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26 self.skipTest('BufferWithSegments not available')
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27
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28 with self.assertRaisesRegexp(ValueError, 'offset within segments array references memory'):
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29 zstd.BufferWithSegments(b'foo', ss.pack(0, 4))
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30
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31 def test_invalid_getitem(self):
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32 if not hasattr(zstd, 'BufferWithSegments'):
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33 self.skipTest('BufferWithSegments not available')
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34
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35 b = zstd.BufferWithSegments(b'foo', ss.pack(0, 3))
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36
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37 with self.assertRaisesRegexp(IndexError, 'offset must be non-negative'):
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38 test = b[-10]
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39
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40 with self.assertRaisesRegexp(IndexError, 'offset must be less than 1'):
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41 test = b[1]
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42
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43 with self.assertRaisesRegexp(IndexError, 'offset must be less than 1'):
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44 test = b[2]
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45
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46 def test_single(self):
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47 if not hasattr(zstd, 'BufferWithSegments'):
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48 self.skipTest('BufferWithSegments not available')
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49
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50 b = zstd.BufferWithSegments(b'foo', ss.pack(0, 3))
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51 self.assertEqual(len(b), 1)
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52 self.assertEqual(b.size, 3)
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53 self.assertEqual(b.tobytes(), b'foo')
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54
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55 self.assertEqual(len(b[0]), 3)
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56 self.assertEqual(b[0].offset, 0)
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57 self.assertEqual(b[0].tobytes(), b'foo')
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58
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59 def test_multiple(self):
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60 if not hasattr(zstd, 'BufferWithSegments'):
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61 self.skipTest('BufferWithSegments not available')
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62
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63 b = zstd.BufferWithSegments(b'foofooxfooxy', b''.join([ss.pack(0, 3),
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64 ss.pack(3, 4),
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65 ss.pack(7, 5)]))
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66 self.assertEqual(len(b), 3)
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67 self.assertEqual(b.size, 12)
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68 self.assertEqual(b.tobytes(), b'foofooxfooxy')
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69
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70 self.assertEqual(b[0].tobytes(), b'foo')
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71 self.assertEqual(b[1].tobytes(), b'foox')
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72 self.assertEqual(b[2].tobytes(), b'fooxy')
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73
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74
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75 class TestBufferWithSegmentsCollection(unittest.TestCase):
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76 def test_empty_constructor(self):
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77 if not hasattr(zstd, 'BufferWithSegmentsCollection'):
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78 self.skipTest('BufferWithSegmentsCollection not available')
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79
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80 with self.assertRaisesRegexp(ValueError, 'must pass at least 1 argument'):
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81 zstd.BufferWithSegmentsCollection()
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82
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83 def test_argument_validation(self):
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84 if not hasattr(zstd, 'BufferWithSegmentsCollection'):
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85 self.skipTest('BufferWithSegmentsCollection not available')
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86
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87 with self.assertRaisesRegexp(TypeError, 'arguments must be BufferWithSegments'):
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88 zstd.BufferWithSegmentsCollection(None)
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89
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90 with self.assertRaisesRegexp(TypeError, 'arguments must be BufferWithSegments'):
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91 zstd.BufferWithSegmentsCollection(zstd.BufferWithSegments(b'foo', ss.pack(0, 3)),
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92 None)
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93
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94 with self.assertRaisesRegexp(ValueError, 'ZstdBufferWithSegments cannot be empty'):
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95 zstd.BufferWithSegmentsCollection(zstd.BufferWithSegments(b'', b''))
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96
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97 def test_length(self):
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98 if not hasattr(zstd, 'BufferWithSegmentsCollection'):
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99 self.skipTest('BufferWithSegmentsCollection not available')
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100
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101 b1 = zstd.BufferWithSegments(b'foo', ss.pack(0, 3))
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102 b2 = zstd.BufferWithSegments(b'barbaz', b''.join([ss.pack(0, 3),
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103 ss.pack(3, 3)]))
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104
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105 c = zstd.BufferWithSegmentsCollection(b1)
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106 self.assertEqual(len(c), 1)
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107 self.assertEqual(c.size(), 3)
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108
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109 c = zstd.BufferWithSegmentsCollection(b2)
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110 self.assertEqual(len(c), 2)
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111 self.assertEqual(c.size(), 6)
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112
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113 c = zstd.BufferWithSegmentsCollection(b1, b2)
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114 self.assertEqual(len(c), 3)
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115 self.assertEqual(c.size(), 9)
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116
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117 def test_getitem(self):
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118 if not hasattr(zstd, 'BufferWithSegmentsCollection'):
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119 self.skipTest('BufferWithSegmentsCollection not available')
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120
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121 b1 = zstd.BufferWithSegments(b'foo', ss.pack(0, 3))
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122 b2 = zstd.BufferWithSegments(b'barbaz', b''.join([ss.pack(0, 3),
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123 ss.pack(3, 3)]))
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124
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125 c = zstd.BufferWithSegmentsCollection(b1, b2)
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126
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127 with self.assertRaisesRegexp(IndexError, 'offset must be less than 3'):
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128 c[3]
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129
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130 with self.assertRaisesRegexp(IndexError, 'offset must be less than 3'):
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131 c[4]
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132
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133 self.assertEqual(c[0].tobytes(), b'foo')
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134 self.assertEqual(c[1].tobytes(), b'bar')
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135 self.assertEqual(c[2].tobytes(), b'baz')