diff options
| author | Martin Panter <vadmium+py@gmail.com> | 2016-05-27 07:32:11 +0000 |
|---|---|---|
| committer | Martin Panter <vadmium+py@gmail.com> | 2016-05-27 07:32:11 +0000 |
| commit | c284ac9a7935131cb90662b3fae3e0822587a60a (patch) | |
| tree | 0bb53f34a46df692060842ea68cfb0a6451559a8 /Lib/test/test_zlib.py | |
| parent | 63047dc197203c96521ed7202a236910799cbb07 (diff) | |
| download | cpython-c284ac9a7935131cb90662b3fae3e0822587a60a.tar.gz | |
Issue #5784: Expand documentation and tests for zlib wbits parameter
Based on documentation by AM Kuchling.
Diffstat (limited to 'Lib/test/test_zlib.py')
| -rw-r--r-- | Lib/test/test_zlib.py | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py index 1cafcb5987..72a1596536 100644 --- a/Lib/test/test_zlib.py +++ b/Lib/test/test_zlib.py @@ -680,6 +680,49 @@ class CompressObjectTestCase(BaseCompressTestCase, unittest.TestCase): finally: data = None + def test_wbits(self): + co = zlib.compressobj(level=1, wbits=15) + zlib15 = co.compress(HAMLET_SCENE) + co.flush() + self.assertEqual(zlib.decompress(zlib15, 15), HAMLET_SCENE) + self.assertEqual(zlib.decompress(zlib15, 0), HAMLET_SCENE) + self.assertEqual(zlib.decompress(zlib15, 32 + 15), HAMLET_SCENE) + with self.assertRaisesRegex(zlib.error, 'invalid window size'): + zlib.decompress(zlib15, 14) + dco = zlib.decompressobj(wbits=32 + 15) + self.assertEqual(dco.decompress(zlib15), HAMLET_SCENE) + dco = zlib.decompressobj(wbits=14) + with self.assertRaisesRegex(zlib.error, 'invalid window size'): + dco.decompress(zlib15) + + co = zlib.compressobj(level=1, wbits=9) + zlib9 = co.compress(HAMLET_SCENE) + co.flush() + self.assertEqual(zlib.decompress(zlib9, 9), HAMLET_SCENE) + self.assertEqual(zlib.decompress(zlib9, 15), HAMLET_SCENE) + self.assertEqual(zlib.decompress(zlib9, 0), HAMLET_SCENE) + self.assertEqual(zlib.decompress(zlib9, 32 + 9), HAMLET_SCENE) + dco = zlib.decompressobj(wbits=32 + 9) + self.assertEqual(dco.decompress(zlib9), HAMLET_SCENE) + + co = zlib.compressobj(level=1, wbits=-15) + deflate15 = co.compress(HAMLET_SCENE) + co.flush() + self.assertEqual(zlib.decompress(deflate15, -15), HAMLET_SCENE) + dco = zlib.decompressobj(wbits=-15) + self.assertEqual(dco.decompress(deflate15), HAMLET_SCENE) + + co = zlib.compressobj(level=1, wbits=-9) + deflate9 = co.compress(HAMLET_SCENE) + co.flush() + self.assertEqual(zlib.decompress(deflate9, -9), HAMLET_SCENE) + self.assertEqual(zlib.decompress(deflate9, -15), HAMLET_SCENE) + dco = zlib.decompressobj(wbits=-9) + self.assertEqual(dco.decompress(deflate9), HAMLET_SCENE) + + co = zlib.compressobj(level=1, wbits=16 + 15) + gzip = co.compress(HAMLET_SCENE) + co.flush() + self.assertEqual(zlib.decompress(gzip, 16 + 15), HAMLET_SCENE) + self.assertEqual(zlib.decompress(gzip, 32 + 15), HAMLET_SCENE) + dco = zlib.decompressobj(32 + 15) + self.assertEqual(dco.decompress(gzip), HAMLET_SCENE) + def genblock(seed, length, step=1024, generator=random): """length-byte stream of random data from a seed (in step-byte blocks).""" |