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SF bug #785222: zlib monotonic test 

For smaller datasets, it is not always true the increasing the compression
level always results in better compression.  Removed the test which made
this invalid assumption.
This commit is contained in:
Raymond Hettinger 2003-08-31 04:35:24 +00:00
parent 9d12ab5c3c
commit 6d362b25c5
1 changed files with 0 additions and 11 deletions
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11
Lib/test/test_zlib.py
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@ -96,17 +96,6 @@ class CompressTestCase(unittest.TestCase):
x = zlib.compress(data)
self.assertEqual(zlib.decompress(x), data)
def test_monotonic(self):
# higher compression levels should not expand compressed size
data = hamlet_scene * 8 * 16
last = length = len(zlib.compress(data, 0))
self.failUnless(last > len(data), "compress level 0 always expands")
for level in range(10):
length = len(zlib.compress(data, level))
self.failUnless(length <= last,
'compress level %d more effective than %d!' % (
level-1, level))
last = length