7fe73a17c5
svn+ssh://pythondev@svn.python.org/python/trunk
........
r70837 | gregory.p.smith | 2009-03-31 11:54:10 -0500 (Tue, 31 Mar 2009) | 9 lines
The unittest.TestCase.assertEqual() now displays the differences in lists,
tuples, dicts and sets on failure.
Many new handy type and comparison specific assert* methods have been added
that fail with error messages actually useful for debugging. Contributed in
by Google and completed with help from mfoord and GvR at PyCon 2009 sprints.
Discussion lives in http://bugs.python.org/issue2578.
........
r70864 | gregory.p.smith | 2009-03-31 14:03:28 -0500 (Tue, 31 Mar 2009) | 10 lines
Rename the actual method definitions to the official assertFoo names.
Adds unittests to make sure the old fail* names continue to work now
and adds a comment that they are pending deprecation.
Also adds a test to confirm that the plural Equals method variants
continue to exist even though we're unlikely to deprecate those.
http://bugs.python.org/issue2578
........
r70878 | gregory.p.smith | 2009-03-31 14:59:14 -0500 (Tue, 31 Mar 2009) | 3 lines
Issue an actual PendingDeprecationWarning for the TestCase.fail* methods.
Document the deprecation.
........
r71004 | benjamin.peterson | 2009-04-01 18:15:49 -0500 (Wed, 01 Apr 2009) | 1 line
remove double underscores
........
r71032 | michael.foord | 2009-04-01 22:20:38 -0500 (Wed, 01 Apr 2009) | 13 lines
Better exception messages for unittest assert methods.
- unittest.assertNotEqual() now uses the inequality operator (!=) instead
of the equality operator.
- Default assertTrue and assertFalse messages are now useful.
- TestCase has a longMessage attribute. This defaults to False, but if set to True
useful error messages are shown in addition to explicit messages passed to assert methods.
Issue #5663
........
r71043 | michael.foord | 2009-04-02 00:51:54 -0500 (Thu, 02 Apr 2009) | 7 lines
Store the functions in the _type_equality_funcs as wrapped objects that are deep copyable.
This allows for the deep copying of TestCase instances.
Issue 5660
........
571 lines
23 KiB
Python
571 lines
23 KiB
Python
import array
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import unittest
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import struct
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import warnings
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from functools import wraps
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from test.support import TestFailed, verbose, run_unittest
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import sys
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ISBIGENDIAN = sys.byteorder == "big"
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IS32BIT = sys.maxsize == 0x7fffffff
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del sys
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try:
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import _struct
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except ImportError:
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PY_STRUCT_FLOAT_COERCE = 2
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else:
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PY_STRUCT_FLOAT_COERCE = getattr(_struct, '_PY_STRUCT_FLOAT_COERCE', 0)
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def string_reverse(s):
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return s[::-1]
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def bigendian_to_native(value):
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if ISBIGENDIAN:
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return value
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else:
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return string_reverse(value)
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def with_warning_restore(func):
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@wraps(func)
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def decorator(*args, **kw):
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with warnings.catch_warnings():
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# We need this function to warn every time, so stick an
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# unqualifed 'always' at the head of the filter list
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warnings.simplefilter("always")
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warnings.filterwarnings("error", category=DeprecationWarning)
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return func(*args, **kw)
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return decorator
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class StructTest(unittest.TestCase):
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@with_warning_restore
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def check_float_coerce(self, format, number):
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# SF bug 1530559. struct.pack raises TypeError where it used to convert.
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if PY_STRUCT_FLOAT_COERCE == 2:
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# Test for pre-2.5 struct module
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packed = struct.pack(format, number)
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floored = struct.unpack(format, packed)[0]
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self.assertEqual(floored, int(number),
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"did not correcly coerce float to int")
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return
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try:
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struct.pack(format, number)
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except (struct.error, TypeError):
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if PY_STRUCT_FLOAT_COERCE:
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self.fail("expected DeprecationWarning for float coerce")
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except DeprecationWarning:
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if not PY_STRUCT_FLOAT_COERCE:
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self.fail("expected to raise struct.error for float coerce")
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else:
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self.fail("did not raise error for float coerce")
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def test_isbigendian(self):
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self.assertEqual((struct.pack('=i', 1)[0] == 0), ISBIGENDIAN)
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def test_consistence(self):
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self.assertRaises(struct.error, struct.calcsize, 'Z')
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sz = struct.calcsize('i')
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self.assertEqual(sz * 3, struct.calcsize('iii'))
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fmt = 'cbxxxxxxhhhhiillffd?'
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fmt3 = '3c3b18x12h6i6l6f3d3?'
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sz = struct.calcsize(fmt)
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sz3 = struct.calcsize(fmt3)
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self.assertEqual(sz * 3, sz3)
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self.assertRaises(struct.error, struct.pack, 'iii', 3)
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self.assertRaises(struct.error, struct.pack, 'i', 3, 3, 3)
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self.assertRaises(struct.error, struct.pack, 'i', 'foo')
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self.assertRaises(struct.error, struct.pack, 'P', 'foo')
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self.assertRaises(struct.error, struct.unpack, 'd', b'flap')
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s = struct.pack('ii', 1, 2)
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self.assertRaises(struct.error, struct.unpack, 'iii', s)
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self.assertRaises(struct.error, struct.unpack, 'i', s)
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def test_transitiveness(self):
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c = b'a'
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b = 1
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h = 255
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i = 65535
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l = 65536
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f = 3.1415
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d = 3.1415
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t = True
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for prefix in ('', '@', '<', '>', '=', '!'):
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for format in ('xcbhilfd?', 'xcBHILfd?'):
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format = prefix + format
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s = struct.pack(format, c, b, h, i, l, f, d, t)
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cp, bp, hp, ip, lp, fp, dp, tp = struct.unpack(format, s)
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self.assertEqual(cp, c)
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self.assertEqual(bp, b)
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self.assertEqual(hp, h)
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self.assertEqual(ip, i)
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self.assertEqual(lp, l)
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self.assertEqual(int(100 * fp), int(100 * f))
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self.assertEqual(int(100 * dp), int(100 * d))
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self.assertEqual(tp, t)
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def test_new_features(self):
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# Test some of the new features in detail
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# (format, argument, big-endian result, little-endian result, asymmetric)
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tests = [
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('c', 'a', 'a', 'a', 0),
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('xc', 'a', '\0a', '\0a', 0),
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('cx', 'a', 'a\0', 'a\0', 0),
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('s', 'a', 'a', 'a', 0),
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('0s', 'helloworld', '', '', 1),
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('1s', 'helloworld', 'h', 'h', 1),
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('9s', 'helloworld', 'helloworl', 'helloworl', 1),
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('10s', 'helloworld', 'helloworld', 'helloworld', 0),
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('11s', 'helloworld', 'helloworld\0', 'helloworld\0', 1),
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('20s', 'helloworld', 'helloworld'+10*'\0', 'helloworld'+10*'\0', 1),
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('b', 7, '\7', '\7', 0),
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('b', -7, '\371', '\371', 0),
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('B', 7, '\7', '\7', 0),
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('B', 249, '\371', '\371', 0),
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('h', 700, '\002\274', '\274\002', 0),
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('h', -700, '\375D', 'D\375', 0),
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('H', 700, '\002\274', '\274\002', 0),
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('H', 0x10000-700, '\375D', 'D\375', 0),
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('i', 70000000, '\004,\035\200', '\200\035,\004', 0),
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('i', -70000000, '\373\323\342\200', '\200\342\323\373', 0),
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('I', 70000000, '\004,\035\200', '\200\035,\004', 0),
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('I', 0x100000000-70000000, '\373\323\342\200', '\200\342\323\373', 0),
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('l', 70000000, '\004,\035\200', '\200\035,\004', 0),
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('l', -70000000, '\373\323\342\200', '\200\342\323\373', 0),
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('L', 70000000, '\004,\035\200', '\200\035,\004', 0),
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('L', 0x100000000-70000000, '\373\323\342\200', '\200\342\323\373', 0),
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('f', 2.0, '@\000\000\000', '\000\000\000@', 0),
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('d', 2.0, '@\000\000\000\000\000\000\000',
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'\000\000\000\000\000\000\000@', 0),
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('f', -2.0, '\300\000\000\000', '\000\000\000\300', 0),
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('d', -2.0, '\300\000\000\000\000\000\000\000',
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'\000\000\000\000\000\000\000\300', 0),
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('?', 0, '\0', '\0', 0),
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('?', 3, '\1', '\1', 1),
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('?', True, '\1', '\1', 0),
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('?', [], '\0', '\0', 1),
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('?', (1,), '\1', '\1', 1),
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]
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for fmt, arg, big, lil, asy in tests:
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big = bytes(big, "latin-1")
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lil = bytes(lil, "latin-1")
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for (xfmt, exp) in [('>'+fmt, big), ('!'+fmt, big), ('<'+fmt, lil),
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('='+fmt, ISBIGENDIAN and big or lil)]:
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res = struct.pack(xfmt, arg)
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self.assertEqual(res, exp)
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self.assertEqual(struct.calcsize(xfmt), len(res))
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rev = struct.unpack(xfmt, res)[0]
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if isinstance(arg, str):
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# Strings are returned as bytes since you can't know the
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# encoding of the string when packed.
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arg = bytes(arg, 'latin1')
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if rev != arg:
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self.assert_(asy)
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def test_native_qQ(self):
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# can't pack -1 as unsigned regardless
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self.assertRaises((struct.error, OverflowError), struct.pack, "Q", -1)
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# can't pack string as 'q' regardless
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self.assertRaises(struct.error, struct.pack, "q", "a")
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# ditto, but 'Q'
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self.assertRaises(struct.error, struct.pack, "Q", "a")
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try:
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struct.pack("q", 5)
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except struct.error:
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# does not have native q/Q
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pass
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else:
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nbytes = struct.calcsize('q')
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# The expected values here are in big-endian format, primarily
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# because I'm on a little-endian machine and so this is the
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# clearest way (for me) to force the code to get exercised.
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for format, input, expected in (
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('q', -1, '\xff' * nbytes),
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('q', 0, '\x00' * nbytes),
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('Q', 0, '\x00' * nbytes),
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('q', 1, '\x00' * (nbytes-1) + '\x01'),
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('Q', (1 << (8*nbytes))-1, '\xff' * nbytes),
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('q', (1 << (8*nbytes-1))-1, '\x7f' + '\xff' * (nbytes - 1))):
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expected = bytes(expected, "latin-1")
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got = struct.pack(format, input)
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native_expected = bigendian_to_native(expected)
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self.assertEqual(got, native_expected)
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retrieved = struct.unpack(format, got)[0]
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self.assertEqual(retrieved, input)
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def test_standard_integers(self):
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# Standard integer tests (bBhHiIlLqQ).
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import binascii
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class IntTester(unittest.TestCase):
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def __init__(self, formatpair, bytesize):
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super(IntTester, self).__init__(methodName='test_one')
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self.assertEqual(len(formatpair), 2)
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self.formatpair = formatpair
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for direction in "<>!=":
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for code in formatpair:
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format = direction + code
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self.assertEqual(struct.calcsize(format), bytesize)
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self.bytesize = bytesize
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self.bitsize = bytesize * 8
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self.signed_code, self.unsigned_code = formatpair
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self.unsigned_min = 0
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self.unsigned_max = 2**self.bitsize - 1
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self.signed_min = -(2**(self.bitsize-1))
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self.signed_max = 2**(self.bitsize-1) - 1
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def test_one(self, x, pack=struct.pack,
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unpack=struct.unpack,
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unhexlify=binascii.unhexlify):
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# Try signed.
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code = self.signed_code
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if self.signed_min <= x <= self.signed_max:
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# Try big-endian.
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expected = x
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if x < 0:
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expected += 1 << self.bitsize
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self.assert_(expected > 0)
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expected = hex(expected)[2:] # chop "0x"
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if len(expected) & 1:
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expected = "0" + expected
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expected = unhexlify(expected)
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expected = b"\x00" * (self.bytesize - len(expected)) + expected
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# Pack work?
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format = ">" + code
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got = pack(format, x)
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self.assertEqual(got, expected)
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# Unpack work?
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retrieved = unpack(format, got)[0]
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self.assertEqual(x, retrieved)
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# Adding any byte should cause a "too big" error.
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self.assertRaises((struct.error, TypeError),
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unpack, format, b'\x01' + got)
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# Try little-endian.
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format = "<" + code
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expected = string_reverse(expected)
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# Pack work?
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got = pack(format, x)
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self.assertEqual(got, expected)
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# Unpack work?
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retrieved = unpack(format, got)[0]
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self.assertEqual(x, retrieved)
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# Adding any byte should cause a "too big" error.
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self.assertRaises((struct.error, TypeError),
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unpack, format, b'\x01' + got)
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else:
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# x is out of range -- verify pack realizes that.
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self.assertRaises((struct.error, OverflowError),
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pack, ">" + code, x)
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self.assertRaises((struct.error, OverflowError),
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pack, "<" + code, x)
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# Much the same for unsigned.
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code = self.unsigned_code
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if self.unsigned_min <= x <= self.unsigned_max:
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# Try big-endian.
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format = ">" + code
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expected = x
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expected = hex(expected)[2:] # chop "0x"
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if len(expected) & 1:
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expected = "0" + expected
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expected = unhexlify(expected)
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expected = b"\x00" * (self.bytesize - len(expected)) + expected
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# Pack work?
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got = pack(format, x)
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self.assertEqual(got, expected)
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# Unpack work?
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retrieved = unpack(format, got)[0]
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self.assertEqual(x, retrieved)
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# Adding any byte should cause a "too big" error.
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self.assertRaises((struct.error, TypeError),
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unpack, format, b'\x01' + got)
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# Try little-endian.
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format = "<" + code
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expected = string_reverse(expected)
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# Pack work?
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got = pack(format, x)
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self.assertEqual(got, expected)
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# Unpack work?
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retrieved = unpack(format, got)[0]
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self.assertEqual(x, retrieved)
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# Adding any byte should cause a "too big" error.
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self.assertRaises((struct.error, TypeError),
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unpack, format, b'\x01' + got)
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else:
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# x is out of range -- verify pack realizes that.
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self.assertRaises((struct.error, OverflowError),
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pack, ">" + code, x)
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self.assertRaises((struct.error, OverflowError),
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pack, "<" + code, x)
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def run(self):
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from random import randrange
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# Create all interesting powers of 2.
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values = []
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for exp in range(self.bitsize + 3):
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values.append(1 << exp)
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# Add some random values.
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for i in range(self.bitsize):
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val = 0
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for j in range(self.bytesize):
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val = (val << 8) | randrange(256)
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values.append(val)
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# Try all those, and their negations, and +-1 from them. Note
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# that this tests all power-of-2 boundaries in range, and a few out
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# of range, plus +-(2**n +- 1).
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for base in values:
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for val in -base, base:
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for incr in -1, 0, 1:
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x = val + incr
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try:
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x = int(x)
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except OverflowError:
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pass
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self.test_one(x)
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# Some error cases.
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for direction in "<>":
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for code in self.formatpair:
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for badobject in "a string", 3+42j, randrange:
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self.assertRaises((struct.error, TypeError),
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struct.pack, direction + code,
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badobject)
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for args in [("bB", 1),
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("hH", 2),
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("iI", 4),
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("lL", 4),
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("qQ", 8)]:
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t = IntTester(*args)
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t.run()
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def test_p_code(self):
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# Test p ("Pascal string") code.
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for code, input, expected, expectedback in [
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('p','abc', '\x00', b''),
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('1p', 'abc', '\x00', b''),
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('2p', 'abc', '\x01a', b'a'),
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('3p', 'abc', '\x02ab', b'ab'),
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('4p', 'abc', '\x03abc', b'abc'),
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('5p', 'abc', '\x03abc\x00', b'abc'),
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('6p', 'abc', '\x03abc\x00\x00', b'abc'),
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('1000p', 'x'*1000, '\xff' + 'x'*999, b'x'*255)]:
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expected = bytes(expected, "latin-1")
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got = struct.pack(code, input)
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self.assertEqual(got, expected)
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(got,) = struct.unpack(code, got)
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self.assertEqual(got, expectedback)
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def test_705836(self):
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# SF bug 705836. "<f" and ">f" had a severe rounding bug, where a carry
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# from the low-order discarded bits could propagate into the exponent
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# field, causing the result to be wrong by a factor of 2.
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import math
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for base in range(1, 33):
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# smaller <- largest representable float less than base.
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delta = 0.5
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while base - delta / 2.0 != base:
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delta /= 2.0
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smaller = base - delta
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# Packing this rounds away a solid string of trailing 1 bits.
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packed = struct.pack("<f", smaller)
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unpacked = struct.unpack("<f", packed)[0]
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# This failed at base = 2, 4, and 32, with unpacked = 1, 2, and
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# 16, respectively.
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self.assertEqual(base, unpacked)
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bigpacked = struct.pack(">f", smaller)
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self.assertEqual(bigpacked, string_reverse(packed))
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unpacked = struct.unpack(">f", bigpacked)[0]
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self.assertEqual(base, unpacked)
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# Largest finite IEEE single.
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big = (1 << 24) - 1
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big = math.ldexp(big, 127 - 23)
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packed = struct.pack(">f", big)
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unpacked = struct.unpack(">f", packed)[0]
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self.assertEqual(big, unpacked)
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# The same, but tack on a 1 bit so it rounds up to infinity.
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big = (1 << 25) - 1
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big = math.ldexp(big, 127 - 24)
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self.assertRaises(OverflowError, struct.pack, ">f", big)
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def test_1229380(self):
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# SF bug 1229380. No struct.pack exception for some out of
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# range integers
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import sys
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for endian in ('', '>', '<'):
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for fmt in ('B', 'H', 'I', 'L'):
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self.assertRaises((struct.error, OverflowError), struct.pack,
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|
endian + fmt, -1)
|
|
|
|
self.assertRaises((struct.error, OverflowError), struct.pack,
|
|
endian + 'B', 300)
|
|
self.assertRaises((struct.error, OverflowError), struct.pack,
|
|
endian + 'H', 70000)
|
|
|
|
self.assertRaises((struct.error, OverflowError), struct.pack,
|
|
endian + 'I', sys.maxsize * 4)
|
|
self.assertRaises((struct.error, OverflowError), struct.pack,
|
|
endian + 'L', sys.maxsize * 4)
|
|
|
|
def XXXtest_1530559(self):
|
|
# XXX This is broken: see the bug report
|
|
# SF bug 1530559. struct.pack raises TypeError where it used to convert.
|
|
for endian in ('', '>', '<'):
|
|
for fmt in ('B', 'H', 'I', 'L', 'b', 'h', 'i', 'l'):
|
|
self.check_float_coerce(endian + fmt, 1.0)
|
|
self.check_float_coerce(endian + fmt, 1.5)
|
|
|
|
def test_unpack_from(self):
|
|
test_string = b'abcd01234'
|
|
fmt = '4s'
|
|
s = struct.Struct(fmt)
|
|
for cls in (bytes, bytearray):
|
|
data = cls(test_string)
|
|
if not isinstance(data, (bytes, bytearray)):
|
|
bytes_data = bytes(data, 'latin1')
|
|
else:
|
|
bytes_data = data
|
|
self.assertEqual(s.unpack_from(data), (b'abcd',))
|
|
self.assertEqual(s.unpack_from(data, 2), (b'cd01',))
|
|
self.assertEqual(s.unpack_from(data, 4), (b'0123',))
|
|
for i in range(6):
|
|
self.assertEqual(s.unpack_from(data, i), (bytes_data[i:i+4],))
|
|
for i in range(6, len(test_string) + 1):
|
|
self.assertRaises(struct.error, s.unpack_from, data, i)
|
|
for cls in (bytes, bytearray):
|
|
data = cls(test_string)
|
|
self.assertEqual(struct.unpack_from(fmt, data), (b'abcd',))
|
|
self.assertEqual(struct.unpack_from(fmt, data, 2), (b'cd01',))
|
|
self.assertEqual(struct.unpack_from(fmt, data, 4), (b'0123',))
|
|
for i in range(6):
|
|
self.assertEqual(struct.unpack_from(fmt, data, i), (data[i:i+4],))
|
|
for i in range(6, len(test_string) + 1):
|
|
self.assertRaises(struct.error, struct.unpack_from, fmt, data, i)
|
|
|
|
def test_pack_into(self):
|
|
test_string = b'Reykjavik rocks, eow!'
|
|
writable_buf = array.array('b', b' '*100)
|
|
fmt = '21s'
|
|
s = struct.Struct(fmt)
|
|
|
|
# Test without offset
|
|
s.pack_into(writable_buf, 0, test_string)
|
|
from_buf = writable_buf.tostring()[:len(test_string)]
|
|
self.assertEqual(from_buf, test_string)
|
|
|
|
# Test with offset.
|
|
s.pack_into(writable_buf, 10, test_string)
|
|
from_buf = writable_buf.tostring()[:len(test_string)+10]
|
|
self.assertEqual(from_buf, test_string[:10] + test_string)
|
|
|
|
# Go beyond boundaries.
|
|
small_buf = array.array('b', b' '*10)
|
|
self.assertRaises(struct.error, s.pack_into, small_buf, 0, test_string)
|
|
self.assertRaises(struct.error, s.pack_into, small_buf, 2, test_string)
|
|
|
|
# Test bogus offset (issue 3694)
|
|
sb = small_buf
|
|
self.assertRaises(TypeError, struct.pack_into, b'1', sb, None)
|
|
|
|
def test_pack_into_fn(self):
|
|
test_string = b'Reykjavik rocks, eow!'
|
|
writable_buf = array.array('b', b' '*100)
|
|
fmt = '21s'
|
|
pack_into = lambda *args: struct.pack_into(fmt, *args)
|
|
|
|
# Test without offset.
|
|
pack_into(writable_buf, 0, test_string)
|
|
from_buf = writable_buf.tostring()[:len(test_string)]
|
|
self.assertEqual(from_buf, test_string)
|
|
|
|
# Test with offset.
|
|
pack_into(writable_buf, 10, test_string)
|
|
from_buf = writable_buf.tostring()[:len(test_string)+10]
|
|
self.assertEqual(from_buf, test_string[:10] + test_string)
|
|
|
|
# Go beyond boundaries.
|
|
small_buf = array.array('b', b' '*10)
|
|
self.assertRaises(struct.error, pack_into, small_buf, 0, test_string)
|
|
self.assertRaises(struct.error, pack_into, small_buf, 2, test_string)
|
|
|
|
def test_unpack_with_buffer(self):
|
|
# SF bug 1563759: struct.unpack doens't support buffer protocol objects
|
|
data1 = array.array('B', b'\x12\x34\x56\x78')
|
|
data2 = memoryview(b'\x12\x34\x56\x78') # XXX b'......XXXX......', 6, 4
|
|
for data in [data1, data2]:
|
|
value, = struct.unpack('>I', data)
|
|
self.assertEqual(value, 0x12345678)
|
|
|
|
def test_bool(self):
|
|
for prefix in tuple("<>!=")+('',):
|
|
false = (), [], [], '', 0
|
|
true = [1], 'test', 5, -1, 0xffffffff+1, 0xffffffff/2
|
|
|
|
falseFormat = prefix + '?' * len(false)
|
|
packedFalse = struct.pack(falseFormat, *false)
|
|
unpackedFalse = struct.unpack(falseFormat, packedFalse)
|
|
|
|
trueFormat = prefix + '?' * len(true)
|
|
packedTrue = struct.pack(trueFormat, *true)
|
|
unpackedTrue = struct.unpack(trueFormat, packedTrue)
|
|
|
|
self.assertEqual(len(true), len(unpackedTrue))
|
|
self.assertEqual(len(false), len(unpackedFalse))
|
|
|
|
for t in unpackedFalse:
|
|
self.assertFalse(t)
|
|
for t in unpackedTrue:
|
|
self.assertTrue(t)
|
|
|
|
packed = struct.pack(prefix+'?', 1)
|
|
|
|
self.assertEqual(len(packed), struct.calcsize(prefix+'?'))
|
|
|
|
if len(packed) != 1:
|
|
self.assertFalse(prefix, msg='encoded bool is not one byte: %r'
|
|
%packed)
|
|
|
|
for c in [b'\x01', b'\x7f', b'\xff', b'\x0f', b'\xf0']:
|
|
self.assertTrue(struct.unpack('>?', c)[0])
|
|
|
|
if IS32BIT:
|
|
def test_crasher(self):
|
|
self.assertRaises(MemoryError, struct.pack, "357913941b", "a")
|
|
|
|
|
|
def test_main():
|
|
run_unittest(StructTest)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|