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annotate contrib/python-zstandard/tests/test_cffi.py @ 30830:08fa3a76a080

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zstd: prevent potential free() of uninitialized memory This is a cherry pick of an upstream fix. The free() of uninitialed memory could likely only occur if a malloc() inside zstd fails. The patched functions aren't currently used by Mercurial. But I don't like leaving footguns sitting around.
author Gregory Szorc <gregory.szorc@gmail.com>
date Tue, 17 Jan 2017 10:17:13 -0800
parents b86a448a2965
children
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b86a448a2965 zstd: vendor python-zstandard 0.5.0
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1 import io
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2
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3 try:
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4 import unittest2 as unittest
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5 except ImportError:
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6 import unittest
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7
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8 import zstd
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9
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10 try:
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11 import zstd_cffi
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12 except ImportError:
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13 raise unittest.SkipTest('cffi version of zstd not available')
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16 class TestCFFIWriteToToCDecompressor(unittest.TestCase):
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17 def test_simple(self):
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18 orig = io.BytesIO()
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19 orig.write(b'foo')
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20 orig.write(b'bar')
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21 orig.write(b'foobar' * 16384)
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22
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23 dest = io.BytesIO()
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24 cctx = zstd_cffi.ZstdCompressor()
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25 with cctx.write_to(dest) as compressor:
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26 compressor.write(orig.getvalue())
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28 uncompressed = io.BytesIO()
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29 dctx = zstd.ZstdDecompressor()
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30 with dctx.write_to(uncompressed) as decompressor:
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31 decompressor.write(dest.getvalue())
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33 self.assertEqual(uncompressed.getvalue(), orig.getvalue())
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