mirror of
https://github.com/python/cpython.git
synced 2025-07-25 12:14:38 +00:00
a21e4ca3c6
........ r70734 | r.david.murray | 2009-03-30 15:04:00 -0400 (Mon, 30 Mar 2009) | 7 lines Add import_function method to test.test_support, and modify a number of tests that expect to be skipped if imports fail or functions don't exist to use import_function and import_module. The ultimate goal is to change regrtest to not skip automatically on ImportError. Checking in now to make sure the buldbots don't show any errors on platforms I can't direct test on. ........ r70775 | r.david.murray | 2009-03-30 19:05:48 -0400 (Mon, 30 Mar 2009) | 4 lines Change more tests to use import_module for the modules that should cause tests to be skipped. Also rename import_function to the more descriptive get_attribute and add a docstring. ........ r70856 | r.david.murray | 2009-03-31 14:32:17 -0400 (Tue, 31 Mar 2009) | 7 lines A few more test skips via import_module, and change import_module to return the error message produced by importlib, so that if an import in the package whose import is being wrapped is what failed the skip message will contain the name of that module instead of the name of the wrapped module. Also fixed formatting of some previous comments. ........ r70874 | r.david.murray | 2009-03-31 15:33:15 -0400 (Tue, 31 Mar 2009) | 5 lines Improve test_support.import_module docstring, remove deprecated flag from get_attribute since it isn't likely to do anything useful. ........ r70876 | r.david.murray | 2009-03-31 15:49:15 -0400 (Tue, 31 Mar 2009) | 4 lines Remove the regrtest check that turns any ImportError into a skipped test. Hopefully all modules whose imports legitimately result in a skipped test have been properly wrapped by the previous commits. ........ r70877 | r.david.murray | 2009-03-31 15:57:24 -0400 (Tue, 31 Mar 2009) | 2 lines Add NEWS entry for regrtest change. ........
483 lines
17 KiB
Python
483 lines
17 KiB
Python
import unittest
|
|
from test import support
|
|
import binascii
|
|
import random
|
|
|
|
zlib = support.import_module('zlib')
|
|
|
|
|
|
class ChecksumTestCase(unittest.TestCase):
|
|
# checksum test cases
|
|
def test_crc32start(self):
|
|
self.assertEqual(zlib.crc32(b""), zlib.crc32(b"", 0))
|
|
self.assert_(zlib.crc32(b"abc", 0xffffffff))
|
|
|
|
def test_crc32empty(self):
|
|
self.assertEqual(zlib.crc32(b"", 0), 0)
|
|
self.assertEqual(zlib.crc32(b"", 1), 1)
|
|
self.assertEqual(zlib.crc32(b"", 432), 432)
|
|
|
|
def test_adler32start(self):
|
|
self.assertEqual(zlib.adler32(b""), zlib.adler32(b"", 1))
|
|
self.assert_(zlib.adler32(b"abc", 0xffffffff))
|
|
|
|
def test_adler32empty(self):
|
|
self.assertEqual(zlib.adler32(b"", 0), 0)
|
|
self.assertEqual(zlib.adler32(b"", 1), 1)
|
|
self.assertEqual(zlib.adler32(b"", 432), 432)
|
|
|
|
def assertEqual32(self, seen, expected):
|
|
# 32-bit values masked -- checksums on 32- vs 64- bit machines
|
|
# This is important if bit 31 (0x08000000L) is set.
|
|
self.assertEqual(seen & 0x0FFFFFFFF, expected & 0x0FFFFFFFF)
|
|
|
|
def test_penguins(self):
|
|
self.assertEqual32(zlib.crc32(b"penguin", 0), 0x0e5c1a120)
|
|
self.assertEqual32(zlib.crc32(b"penguin", 1), 0x43b6aa94)
|
|
self.assertEqual32(zlib.adler32(b"penguin", 0), 0x0bcf02f6)
|
|
self.assertEqual32(zlib.adler32(b"penguin", 1), 0x0bd602f7)
|
|
|
|
self.assertEqual(zlib.crc32(b"penguin"), zlib.crc32(b"penguin", 0))
|
|
self.assertEqual(zlib.adler32(b"penguin"),zlib.adler32(b"penguin",1))
|
|
|
|
def test_crc32_adler32_unsigned(self):
|
|
foo = 'abcdefghijklmnop'
|
|
# explicitly test signed behavior
|
|
self.assertEqual(zlib.crc32(foo), 2486878355)
|
|
self.assertEqual(zlib.crc32('spam'), 1138425661)
|
|
self.assertEqual(zlib.adler32(foo+foo), 3573550353)
|
|
self.assertEqual(zlib.adler32('spam'), 72286642)
|
|
|
|
def test_same_as_binascii_crc32(self):
|
|
foo = b'abcdefghijklmnop'
|
|
crc = 2486878355
|
|
self.assertEqual(binascii.crc32(foo), crc)
|
|
self.assertEqual(zlib.crc32(foo), crc)
|
|
self.assertEqual(binascii.crc32(b'spam'), zlib.crc32(b'spam'))
|
|
|
|
|
|
|
|
class ExceptionTestCase(unittest.TestCase):
|
|
# make sure we generate some expected errors
|
|
def test_badlevel(self):
|
|
# specifying compression level out of range causes an error
|
|
# (but -1 is Z_DEFAULT_COMPRESSION and apparently the zlib
|
|
# accepts 0 too)
|
|
self.assertRaises(zlib.error, zlib.compress, 'ERROR', 10)
|
|
|
|
def test_badcompressobj(self):
|
|
# verify failure on building compress object with bad params
|
|
self.assertRaises(ValueError, zlib.compressobj, 1, zlib.DEFLATED, 0)
|
|
# specifying total bits too large causes an error
|
|
self.assertRaises(ValueError,
|
|
zlib.compressobj, 1, zlib.DEFLATED, zlib.MAX_WBITS + 1)
|
|
|
|
def test_baddecompressobj(self):
|
|
# verify failure on building decompress object with bad params
|
|
self.assertRaises(ValueError, zlib.decompressobj, 0)
|
|
|
|
def test_decompressobj_badflush(self):
|
|
# verify failure on calling decompressobj.flush with bad params
|
|
self.assertRaises(ValueError, zlib.decompressobj().flush, 0)
|
|
self.assertRaises(ValueError, zlib.decompressobj().flush, -1)
|
|
|
|
|
|
|
|
class CompressTestCase(unittest.TestCase):
|
|
# Test compression in one go (whole message compression)
|
|
def test_speech(self):
|
|
x = zlib.compress(HAMLET_SCENE)
|
|
self.assertEqual(zlib.decompress(x), HAMLET_SCENE)
|
|
|
|
def test_speech128(self):
|
|
# compress more data
|
|
data = HAMLET_SCENE * 128
|
|
x = zlib.compress(data)
|
|
self.assertEqual(zlib.decompress(x), data)
|
|
|
|
|
|
|
|
|
|
class CompressObjectTestCase(unittest.TestCase):
|
|
# Test compression object
|
|
def test_pair(self):
|
|
# straightforward compress/decompress objects
|
|
data = HAMLET_SCENE * 128
|
|
co = zlib.compressobj()
|
|
x1 = co.compress(data)
|
|
x2 = co.flush()
|
|
self.assertRaises(zlib.error, co.flush) # second flush should not work
|
|
dco = zlib.decompressobj()
|
|
y1 = dco.decompress(x1 + x2)
|
|
y2 = dco.flush()
|
|
self.assertEqual(data, y1 + y2)
|
|
self.assert_(isinstance(dco.unconsumed_tail, bytes))
|
|
self.assert_(isinstance(dco.unused_data, bytes))
|
|
|
|
def test_compressoptions(self):
|
|
# specify lots of options to compressobj()
|
|
level = 2
|
|
method = zlib.DEFLATED
|
|
wbits = -12
|
|
memlevel = 9
|
|
strategy = zlib.Z_FILTERED
|
|
co = zlib.compressobj(level, method, wbits, memlevel, strategy)
|
|
x1 = co.compress(HAMLET_SCENE)
|
|
x2 = co.flush()
|
|
dco = zlib.decompressobj(wbits)
|
|
y1 = dco.decompress(x1 + x2)
|
|
y2 = dco.flush()
|
|
self.assertEqual(HAMLET_SCENE, y1 + y2)
|
|
|
|
def test_compressincremental(self):
|
|
# compress object in steps, decompress object as one-shot
|
|
data = HAMLET_SCENE * 128
|
|
co = zlib.compressobj()
|
|
bufs = []
|
|
for i in range(0, len(data), 256):
|
|
bufs.append(co.compress(data[i:i+256]))
|
|
bufs.append(co.flush())
|
|
combuf = b''.join(bufs)
|
|
|
|
dco = zlib.decompressobj()
|
|
y1 = dco.decompress(b''.join(bufs))
|
|
y2 = dco.flush()
|
|
self.assertEqual(data, y1 + y2)
|
|
|
|
def test_decompinc(self, flush=False, source=None, cx=256, dcx=64):
|
|
# compress object in steps, decompress object in steps
|
|
source = source or HAMLET_SCENE
|
|
data = source * 128
|
|
co = zlib.compressobj()
|
|
bufs = []
|
|
for i in range(0, len(data), cx):
|
|
bufs.append(co.compress(data[i:i+cx]))
|
|
bufs.append(co.flush())
|
|
combuf = b''.join(bufs)
|
|
|
|
decombuf = zlib.decompress(combuf)
|
|
# Test type of return value
|
|
self.assert_(isinstance(decombuf, bytes))
|
|
|
|
self.assertEqual(data, decombuf)
|
|
|
|
dco = zlib.decompressobj()
|
|
bufs = []
|
|
for i in range(0, len(combuf), dcx):
|
|
bufs.append(dco.decompress(combuf[i:i+dcx]))
|
|
self.assertEqual(b'', dco.unconsumed_tail, ########
|
|
"(A) uct should be b'': not %d long" %
|
|
len(dco.unconsumed_tail))
|
|
self.assertEqual(b'', dco.unused_data)
|
|
if flush:
|
|
bufs.append(dco.flush())
|
|
else:
|
|
while True:
|
|
chunk = dco.decompress('')
|
|
if chunk:
|
|
bufs.append(chunk)
|
|
else:
|
|
break
|
|
self.assertEqual(b'', dco.unconsumed_tail, ########
|
|
"(B) uct should be b'': not %d long" %
|
|
len(dco.unconsumed_tail))
|
|
self.assertEqual(b'', dco.unused_data)
|
|
self.assertEqual(data, b''.join(bufs))
|
|
# Failure means: "decompressobj with init options failed"
|
|
|
|
def test_decompincflush(self):
|
|
self.test_decompinc(flush=True)
|
|
|
|
def test_decompimax(self, source=None, cx=256, dcx=64):
|
|
# compress in steps, decompress in length-restricted steps
|
|
source = source or HAMLET_SCENE
|
|
# Check a decompression object with max_length specified
|
|
data = source * 128
|
|
co = zlib.compressobj()
|
|
bufs = []
|
|
for i in range(0, len(data), cx):
|
|
bufs.append(co.compress(data[i:i+cx]))
|
|
bufs.append(co.flush())
|
|
combuf = b''.join(bufs)
|
|
self.assertEqual(data, zlib.decompress(combuf),
|
|
'compressed data failure')
|
|
|
|
dco = zlib.decompressobj()
|
|
bufs = []
|
|
cb = combuf
|
|
while cb:
|
|
#max_length = 1 + len(cb)//10
|
|
chunk = dco.decompress(cb, dcx)
|
|
self.failIf(len(chunk) > dcx,
|
|
'chunk too big (%d>%d)' % (len(chunk), dcx))
|
|
bufs.append(chunk)
|
|
cb = dco.unconsumed_tail
|
|
bufs.append(dco.flush())
|
|
self.assertEqual(data, b''.join(bufs), 'Wrong data retrieved')
|
|
|
|
def test_decompressmaxlen(self, flush=False):
|
|
# Check a decompression object with max_length specified
|
|
data = HAMLET_SCENE * 128
|
|
co = zlib.compressobj()
|
|
bufs = []
|
|
for i in range(0, len(data), 256):
|
|
bufs.append(co.compress(data[i:i+256]))
|
|
bufs.append(co.flush())
|
|
combuf = b''.join(bufs)
|
|
self.assertEqual(data, zlib.decompress(combuf),
|
|
'compressed data failure')
|
|
|
|
dco = zlib.decompressobj()
|
|
bufs = []
|
|
cb = combuf
|
|
while cb:
|
|
max_length = 1 + len(cb)//10
|
|
chunk = dco.decompress(cb, max_length)
|
|
self.failIf(len(chunk) > max_length,
|
|
'chunk too big (%d>%d)' % (len(chunk),max_length))
|
|
bufs.append(chunk)
|
|
cb = dco.unconsumed_tail
|
|
if flush:
|
|
bufs.append(dco.flush())
|
|
else:
|
|
while chunk:
|
|
chunk = dco.decompress('', max_length)
|
|
self.failIf(len(chunk) > max_length,
|
|
'chunk too big (%d>%d)' % (len(chunk),max_length))
|
|
bufs.append(chunk)
|
|
self.assertEqual(data, b''.join(bufs), 'Wrong data retrieved')
|
|
|
|
def test_decompressmaxlenflush(self):
|
|
self.test_decompressmaxlen(flush=True)
|
|
|
|
def test_maxlenmisc(self):
|
|
# Misc tests of max_length
|
|
dco = zlib.decompressobj()
|
|
self.assertRaises(ValueError, dco.decompress, "", -1)
|
|
self.assertEqual(b'', dco.unconsumed_tail)
|
|
|
|
def test_flushes(self):
|
|
# Test flush() with the various options, using all the
|
|
# different levels in order to provide more variations.
|
|
sync_opt = ['Z_NO_FLUSH', 'Z_SYNC_FLUSH', 'Z_FULL_FLUSH']
|
|
sync_opt = [getattr(zlib, opt) for opt in sync_opt
|
|
if hasattr(zlib, opt)]
|
|
data = HAMLET_SCENE * 8
|
|
|
|
for sync in sync_opt:
|
|
for level in range(10):
|
|
obj = zlib.compressobj( level )
|
|
a = obj.compress( data[:3000] )
|
|
b = obj.flush( sync )
|
|
c = obj.compress( data[3000:] )
|
|
d = obj.flush()
|
|
self.assertEqual(zlib.decompress(b''.join([a,b,c,d])),
|
|
data, ("Decompress failed: flush "
|
|
"mode=%i, level=%i") % (sync, level))
|
|
del obj
|
|
|
|
def test_odd_flush(self):
|
|
# Test for odd flushing bugs noted in 2.0, and hopefully fixed in 2.1
|
|
import random
|
|
|
|
if hasattr(zlib, 'Z_SYNC_FLUSH'):
|
|
# Testing on 17K of "random" data
|
|
|
|
# Create compressor and decompressor objects
|
|
co = zlib.compressobj(zlib.Z_BEST_COMPRESSION)
|
|
dco = zlib.decompressobj()
|
|
|
|
# Try 17K of data
|
|
# generate random data stream
|
|
try:
|
|
# In 2.3 and later, WichmannHill is the RNG of the bug report
|
|
gen = random.WichmannHill()
|
|
except AttributeError:
|
|
try:
|
|
# 2.2 called it Random
|
|
gen = random.Random()
|
|
except AttributeError:
|
|
# others might simply have a single RNG
|
|
gen = random
|
|
gen.seed(1)
|
|
data = genblock(1, 17 * 1024, generator=gen)
|
|
|
|
# compress, sync-flush, and decompress
|
|
first = co.compress(data)
|
|
second = co.flush(zlib.Z_SYNC_FLUSH)
|
|
expanded = dco.decompress(first + second)
|
|
|
|
# if decompressed data is different from the input data, choke.
|
|
self.assertEqual(expanded, data, "17K random source doesn't match")
|
|
|
|
def test_empty_flush(self):
|
|
# Test that calling .flush() on unused objects works.
|
|
# (Bug #1083110 -- calling .flush() on decompress objects
|
|
# caused a core dump.)
|
|
|
|
co = zlib.compressobj(zlib.Z_BEST_COMPRESSION)
|
|
self.failUnless(co.flush()) # Returns a zlib header
|
|
dco = zlib.decompressobj()
|
|
self.assertEqual(dco.flush(), b"") # Returns nothing
|
|
|
|
if hasattr(zlib.compressobj(), "copy"):
|
|
def test_compresscopy(self):
|
|
# Test copying a compression object
|
|
data0 = HAMLET_SCENE
|
|
data1 = bytes(str(HAMLET_SCENE, "ascii").swapcase(), "ascii")
|
|
c0 = zlib.compressobj(zlib.Z_BEST_COMPRESSION)
|
|
bufs0 = []
|
|
bufs0.append(c0.compress(data0))
|
|
|
|
c1 = c0.copy()
|
|
bufs1 = bufs0[:]
|
|
|
|
bufs0.append(c0.compress(data0))
|
|
bufs0.append(c0.flush())
|
|
s0 = b''.join(bufs0)
|
|
|
|
bufs1.append(c1.compress(data1))
|
|
bufs1.append(c1.flush())
|
|
s1 = b''.join(bufs1)
|
|
|
|
self.assertEqual(zlib.decompress(s0),data0+data0)
|
|
self.assertEqual(zlib.decompress(s1),data0+data1)
|
|
|
|
def test_badcompresscopy(self):
|
|
# Test copying a compression object in an inconsistent state
|
|
c = zlib.compressobj()
|
|
c.compress(HAMLET_SCENE)
|
|
c.flush()
|
|
self.assertRaises(ValueError, c.copy)
|
|
|
|
if hasattr(zlib.decompressobj(), "copy"):
|
|
def test_decompresscopy(self):
|
|
# Test copying a decompression object
|
|
data = HAMLET_SCENE
|
|
comp = zlib.compress(data)
|
|
# Test type of return value
|
|
self.assert_(isinstance(comp, bytes))
|
|
|
|
d0 = zlib.decompressobj()
|
|
bufs0 = []
|
|
bufs0.append(d0.decompress(comp[:32]))
|
|
|
|
d1 = d0.copy()
|
|
bufs1 = bufs0[:]
|
|
|
|
bufs0.append(d0.decompress(comp[32:]))
|
|
s0 = b''.join(bufs0)
|
|
|
|
bufs1.append(d1.decompress(comp[32:]))
|
|
s1 = b''.join(bufs1)
|
|
|
|
self.assertEqual(s0,s1)
|
|
self.assertEqual(s0,data)
|
|
|
|
def test_baddecompresscopy(self):
|
|
# Test copying a compression object in an inconsistent state
|
|
data = zlib.compress(HAMLET_SCENE)
|
|
d = zlib.decompressobj()
|
|
d.decompress(data)
|
|
d.flush()
|
|
self.assertRaises(ValueError, d.copy)
|
|
|
|
def genblock(seed, length, step=1024, generator=random):
|
|
"""length-byte stream of random data from a seed (in step-byte blocks)."""
|
|
if seed is not None:
|
|
generator.seed(seed)
|
|
randint = generator.randint
|
|
if length < step or step < 2:
|
|
step = length
|
|
blocks = bytes()
|
|
for i in range(0, length, step):
|
|
blocks += bytes(randint(0, 255) for x in range(step))
|
|
return blocks
|
|
|
|
|
|
|
|
def choose_lines(source, number, seed=None, generator=random):
|
|
"""Return a list of number lines randomly chosen from the source"""
|
|
if seed is not None:
|
|
generator.seed(seed)
|
|
sources = source.split('\n')
|
|
return [generator.choice(sources) for n in range(number)]
|
|
|
|
|
|
|
|
HAMLET_SCENE = b"""
|
|
LAERTES
|
|
|
|
O, fear me not.
|
|
I stay too long: but here my father comes.
|
|
|
|
Enter POLONIUS
|
|
|
|
A double blessing is a double grace,
|
|
Occasion smiles upon a second leave.
|
|
|
|
LORD POLONIUS
|
|
|
|
Yet here, Laertes! aboard, aboard, for shame!
|
|
The wind sits in the shoulder of your sail,
|
|
And you are stay'd for. There; my blessing with thee!
|
|
And these few precepts in thy memory
|
|
See thou character. Give thy thoughts no tongue,
|
|
Nor any unproportioned thought his act.
|
|
Be thou familiar, but by no means vulgar.
|
|
Those friends thou hast, and their adoption tried,
|
|
Grapple them to thy soul with hoops of steel;
|
|
But do not dull thy palm with entertainment
|
|
Of each new-hatch'd, unfledged comrade. Beware
|
|
Of entrance to a quarrel, but being in,
|
|
Bear't that the opposed may beware of thee.
|
|
Give every man thy ear, but few thy voice;
|
|
Take each man's censure, but reserve thy judgment.
|
|
Costly thy habit as thy purse can buy,
|
|
But not express'd in fancy; rich, not gaudy;
|
|
For the apparel oft proclaims the man,
|
|
And they in France of the best rank and station
|
|
Are of a most select and generous chief in that.
|
|
Neither a borrower nor a lender be;
|
|
For loan oft loses both itself and friend,
|
|
And borrowing dulls the edge of husbandry.
|
|
This above all: to thine ownself be true,
|
|
And it must follow, as the night the day,
|
|
Thou canst not then be false to any man.
|
|
Farewell: my blessing season this in thee!
|
|
|
|
LAERTES
|
|
|
|
Most humbly do I take my leave, my lord.
|
|
|
|
LORD POLONIUS
|
|
|
|
The time invites you; go; your servants tend.
|
|
|
|
LAERTES
|
|
|
|
Farewell, Ophelia; and remember well
|
|
What I have said to you.
|
|
|
|
OPHELIA
|
|
|
|
'Tis in my memory lock'd,
|
|
And you yourself shall keep the key of it.
|
|
|
|
LAERTES
|
|
|
|
Farewell.
|
|
"""
|
|
|
|
|
|
def test_main():
|
|
support.run_unittest(
|
|
ChecksumTestCase,
|
|
ExceptionTestCase,
|
|
CompressTestCase,
|
|
CompressObjectTestCase
|
|
)
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main() # XXX
|
|
###test_main()
|