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${this.title}
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Code Editor : test_bigmem.py
"""Bigmem tests - tests for the 32-bit boundary in containers. These tests try to exercise the 32-bit boundary that is sometimes, if rarely, exceeded in practice, but almost never tested. They are really only meaningful on 64-bit builds on machines with a *lot* of memory, but the tests are always run, usually with very low memory limits to make sure the tests themselves don't suffer from bitrot. To run them for real, pass a high memory limit to regrtest, with the -M option. """ from test import support from test.support import bigmemtest, _1G, _2G, _4G import unittest import operator import sys # These tests all use one of the bigmemtest decorators to indicate how much # memory they use and how much memory they need to be even meaningful. The # decorators take two arguments: a 'memuse' indicator declaring # (approximate) bytes per size-unit the test will use (at peak usage), and a # 'minsize' indicator declaring a minimum *useful* size. A test that # allocates a bytestring to test various operations near the end will have a # minsize of at least 2Gb (or it wouldn't reach the 32-bit limit, so the # test wouldn't be very useful) and a memuse of 1 (one byte per size-unit, # if it allocates only one big string at a time.) # # When run with a memory limit set, both decorators skip tests that need # more memory than available to be meaningful. The precisionbigmemtest will # always pass minsize as size, even if there is much more memory available. # The bigmemtest decorator will scale size upward to fill available memory. # # Bigmem testing houserules: # # - Try not to allocate too many large objects. It's okay to rely on # refcounting semantics, and don't forget that 's = create_largestring()' # doesn't release the old 's' (if it exists) until well after its new # value has been created. Use 'del s' before the create_largestring call. # # - Do *not* compare large objects using assertEqual, assertIn or similar. # It's a lengthy operation and the errormessage will be utterly useless # due to its size. To make sure whether a result has the right contents, # better to use the strip or count methods, or compare meaningful slices. # # - Don't forget to test for large indices, offsets and results and such, # in addition to large sizes. Anything that probes the 32-bit boundary. # # - When repeating an object (say, a substring, or a small list) to create # a large object, make the subobject of a length that is not a power of # 2. That way, int-wrapping problems are more easily detected. # # - Despite the bigmemtest decorator, all tests will actually be called # with a much smaller number too, in the normal test run (5Kb currently.) # This is so the tests themselves get frequent testing. # Consequently, always make all large allocations based on the # passed-in 'size', and don't rely on the size being very large. Also, # memuse-per-size should remain sane (less than a few thousand); if your # test uses more, adjust 'size' upward, instead. # BEWARE: it seems that one failing test can yield other subsequent tests to # fail as well. I do not know whether it is due to memory fragmentation # issues, or other specifics of the platform malloc() routine. ascii_char_size = 1 ucs2_char_size = 2 ucs4_char_size = 4 pointer_size = 4 if sys.maxsize < 2**32 else 8 class BaseStrTest: def _test_capitalize(self, size): _ = self.from_latin1 SUBSTR = self.from_latin1(' abc def ghi') s = _('-') * size + SUBSTR caps = s.capitalize() self.assertEqual(caps[-len(SUBSTR):], SUBSTR.capitalize()) self.assertEqual(caps.lstrip(_('-')), SUBSTR) @bigmemtest(size=_2G + 10, memuse=1) def test_center(self, size): SUBSTR = self.from_latin1(' abc def ghi') s = SUBSTR.center(size) self.assertEqual(len(s), size) lpadsize = rpadsize = (len(s) - len(SUBSTR)) // 2 if len(s) % 2: lpadsize += 1 self.assertEqual(s[lpadsize:-rpadsize], SUBSTR) self.assertEqual(s.strip(), SUBSTR.strip()) @bigmemtest(size=_2G, memuse=2) def test_count(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') s = _('.') * size + SUBSTR self.assertEqual(s.count(_('.')), size) s += _('.') self.assertEqual(s.count(_('.')), size + 1) self.assertEqual(s.count(_(' ')), 3) self.assertEqual(s.count(_('i')), 1) self.assertEqual(s.count(_('j')), 0) @bigmemtest(size=_2G, memuse=2) def test_endswith(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') s = _('-') * size + SUBSTR self.assertTrue(s.endswith(SUBSTR)) self.assertTrue(s.endswith(s)) s2 = _('...') + s self.assertTrue(s2.endswith(s)) self.assertFalse(s.endswith(_('a') + SUBSTR)) self.assertFalse(SUBSTR.endswith(s)) @bigmemtest(size=_2G + 10, memuse=2) def test_expandtabs(self, size): _ = self.from_latin1 s = _('-') * size tabsize = 8 self.assertTrue(s.expandtabs() == s) del s slen, remainder = divmod(size, tabsize) s = _(' \t') * slen s = s.expandtabs(tabsize) self.assertEqual(len(s), size - remainder) self.assertEqual(len(s.strip(_(' '))), 0) @bigmemtest(size=_2G, memuse=2) def test_find(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') sublen = len(SUBSTR) s = _('').join([SUBSTR, _('-') * size, SUBSTR]) self.assertEqual(s.find(_(' ')), 0) self.assertEqual(s.find(SUBSTR), 0) self.assertEqual(s.find(_(' '), sublen), sublen + size) self.assertEqual(s.find(SUBSTR, len(SUBSTR)), sublen + size) self.assertEqual(s.find(_('i')), SUBSTR.find(_('i'))) self.assertEqual(s.find(_('i'), sublen), sublen + size + SUBSTR.find(_('i'))) self.assertEqual(s.find(_('i'), size), sublen + size + SUBSTR.find(_('i'))) self.assertEqual(s.find(_('j')), -1) @bigmemtest(size=_2G, memuse=2) def test_index(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') sublen = len(SUBSTR) s = _('').join([SUBSTR, _('-') * size, SUBSTR]) self.assertEqual(s.index(_(' ')), 0) self.assertEqual(s.index(SUBSTR), 0) self.assertEqual(s.index(_(' '), sublen), sublen + size) self.assertEqual(s.index(SUBSTR, sublen), sublen + size) self.assertEqual(s.index(_('i')), SUBSTR.index(_('i'))) self.assertEqual(s.index(_('i'), sublen), sublen + size + SUBSTR.index(_('i'))) self.assertEqual(s.index(_('i'), size), sublen + size + SUBSTR.index(_('i'))) self.assertRaises(ValueError, s.index, _('j')) @bigmemtest(size=_2G, memuse=2) def test_isalnum(self, size): _ = self.from_latin1 SUBSTR = _('123456') s = _('a') * size + SUBSTR self.assertTrue(s.isalnum()) s += _('.') self.assertFalse(s.isalnum()) @bigmemtest(size=_2G, memuse=2) def test_isalpha(self, size): _ = self.from_latin1 SUBSTR = _('zzzzzzz') s = _('a') * size + SUBSTR self.assertTrue(s.isalpha()) s += _('.') self.assertFalse(s.isalpha()) @bigmemtest(size=_2G, memuse=2) def test_isdigit(self, size): _ = self.from_latin1 SUBSTR = _('123456') s = _('9') * size + SUBSTR self.assertTrue(s.isdigit()) s += _('z') self.assertFalse(s.isdigit()) @bigmemtest(size=_2G, memuse=2) def test_islower(self, size): _ = self.from_latin1 chars = _(''.join( chr(c) for c in range(255) if not chr(c).isupper())) repeats = size // len(chars) + 2 s = chars * repeats self.assertTrue(s.islower()) s += _('A') self.assertFalse(s.islower()) @bigmemtest(size=_2G, memuse=2) def test_isspace(self, size): _ = self.from_latin1 whitespace = _(' \f\n\r\t\v') repeats = size // len(whitespace) + 2 s = whitespace * repeats self.assertTrue(s.isspace()) s += _('j') self.assertFalse(s.isspace()) @bigmemtest(size=_2G, memuse=2) def test_istitle(self, size): _ = self.from_latin1 SUBSTR = _('123456') s = _('').join([_('A'), _('a') * size, SUBSTR]) self.assertTrue(s.istitle()) s += _('A') self.assertTrue(s.istitle()) s += _('aA') self.assertFalse(s.istitle()) @bigmemtest(size=_2G, memuse=2) def test_isupper(self, size): _ = self.from_latin1 chars = _(''.join( chr(c) for c in range(255) if not chr(c).islower())) repeats = size // len(chars) + 2 s = chars * repeats self.assertTrue(s.isupper()) s += _('a') self.assertFalse(s.isupper()) @bigmemtest(size=_2G, memuse=2) def test_join(self, size): _ = self.from_latin1 s = _('A') * size x = s.join([_('aaaaa'), _('bbbbb')]) self.assertEqual(x.count(_('a')), 5) self.assertEqual(x.count(_('b')), 5) self.assertTrue(x.startswith(_('aaaaaA'))) self.assertTrue(x.endswith(_('Abbbbb'))) @bigmemtest(size=_2G + 10, memuse=1) def test_ljust(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') s = SUBSTR.ljust(size) self.assertTrue(s.startswith(SUBSTR + _(' '))) self.assertEqual(len(s), size) self.assertEqual(s.strip(), SUBSTR.strip()) @bigmemtest(size=_2G + 10, memuse=2) def test_lower(self, size): _ = self.from_latin1 s = _('A') * size s = s.lower() self.assertEqual(len(s), size) self.assertEqual(s.count(_('a')), size) @bigmemtest(size=_2G + 10, memuse=1) def test_lstrip(self, size): _ = self.from_latin1 SUBSTR = _('abc def ghi') s = SUBSTR.rjust(size) self.assertEqual(len(s), size) self.assertEqual(s.lstrip(), SUBSTR.lstrip()) del s s = SUBSTR.ljust(size) self.assertEqual(len(s), size) # Type-specific optimization if isinstance(s, (str, bytes)): stripped = s.lstrip() self.assertTrue(stripped is s) @bigmemtest(size=_2G + 10, memuse=2) def test_replace(self, size): _ = self.from_latin1 replacement = _('a') s = _(' ') * size s = s.replace(_(' '), replacement) self.assertEqual(len(s), size) self.assertEqual(s.count(replacement), size) s = s.replace(replacement, _(' '), size - 4) self.assertEqual(len(s), size) self.assertEqual(s.count(replacement), 4) self.assertEqual(s[-10:], _(' aaaa')) @bigmemtest(size=_2G, memuse=2) def test_rfind(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') sublen = len(SUBSTR) s = _('').join([SUBSTR, _('-') * size, SUBSTR]) self.assertEqual(s.rfind(_(' ')), sublen + size + SUBSTR.rfind(_(' '))) self.assertEqual(s.rfind(SUBSTR), sublen + size) self.assertEqual(s.rfind(_(' '), 0, size), SUBSTR.rfind(_(' '))) self.assertEqual(s.rfind(SUBSTR, 0, sublen + size), 0) self.assertEqual(s.rfind(_('i')), sublen + size + SUBSTR.rfind(_('i'))) self.assertEqual(s.rfind(_('i'), 0, sublen), SUBSTR.rfind(_('i'))) self.assertEqual(s.rfind(_('i'), 0, sublen + size), SUBSTR.rfind(_('i'))) self.assertEqual(s.rfind(_('j')), -1) @bigmemtest(size=_2G, memuse=2) def test_rindex(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') sublen = len(SUBSTR) s = _('').join([SUBSTR, _('-') * size, SUBSTR]) self.assertEqual(s.rindex(_(' ')), sublen + size + SUBSTR.rindex(_(' '))) self.assertEqual(s.rindex(SUBSTR), sublen + size) self.assertEqual(s.rindex(_(' '), 0, sublen + size - 1), SUBSTR.rindex(_(' '))) self.assertEqual(s.rindex(SUBSTR, 0, sublen + size), 0) self.assertEqual(s.rindex(_('i')), sublen + size + SUBSTR.rindex(_('i'))) self.assertEqual(s.rindex(_('i'), 0, sublen), SUBSTR.rindex(_('i'))) self.assertEqual(s.rindex(_('i'), 0, sublen + size), SUBSTR.rindex(_('i'))) self.assertRaises(ValueError, s.rindex, _('j')) @bigmemtest(size=_2G + 10, memuse=1) def test_rjust(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') s = SUBSTR.ljust(size) self.assertTrue(s.startswith(SUBSTR + _(' '))) self.assertEqual(len(s), size) self.assertEqual(s.strip(), SUBSTR.strip()) @bigmemtest(size=_2G + 10, memuse=1) def test_rstrip(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') s = SUBSTR.ljust(size) self.assertEqual(len(s), size) self.assertEqual(s.rstrip(), SUBSTR.rstrip()) del s s = SUBSTR.rjust(size) self.assertEqual(len(s), size) # Type-specific optimization if isinstance(s, (str, bytes)): stripped = s.rstrip() self.assertTrue(stripped is s) # The test takes about size bytes to build a string, and then about # sqrt(size) substrings of sqrt(size) in size and a list to # hold sqrt(size) items. It's close but just over 2x size. @bigmemtest(size=_2G, memuse=2.1) def test_split_small(self, size): _ = self.from_latin1 # Crudely calculate an estimate so that the result of s.split won't # take up an inordinate amount of memory chunksize = int(size ** 0.5 + 2) SUBSTR = _('a') + _(' ') * chunksize s = SUBSTR * chunksize l = s.split() self.assertEqual(len(l), chunksize) expected = _('a') for item in l: self.assertEqual(item, expected) del l l = s.split(_('a')) self.assertEqual(len(l), chunksize + 1) expected = _(' ') * chunksize for item in filter(None, l): self.assertEqual(item, expected) # Allocates a string of twice size (and briefly two) and a list of # size. Because of internal affairs, the s.split() call produces a # list of size times the same one-character string, so we only # suffer for the list size. (Otherwise, it'd cost another 48 times # size in bytes!) Nevertheless, a list of size takes # 8*size bytes. @bigmemtest(size=_2G + 5, memuse=ascii_char_size * 2 + pointer_size) def test_split_large(self, size): _ = self.from_latin1 s = _(' a') * size + _(' ') l = s.split() self.assertEqual(len(l), size) self.assertEqual(set(l), set([_('a')])) del l l = s.split(_('a')) self.assertEqual(len(l), size + 1) self.assertEqual(set(l), set([_(' ')])) @bigmemtest(size=_2G, memuse=2.1) def test_splitlines(self, size): _ = self.from_latin1 # Crudely calculate an estimate so that the result of s.split won't # take up an inordinate amount of memory chunksize = int(size ** 0.5 + 2) // 2 SUBSTR = _(' ') * chunksize + _('\n') + _(' ') * chunksize + _('\r\n') s = SUBSTR * (chunksize * 2) l = s.splitlines() self.assertEqual(len(l), chunksize * 4) expected = _(' ') * chunksize for item in l: self.assertEqual(item, expected) @bigmemtest(size=_2G, memuse=2) def test_startswith(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi') s = _('-') * size + SUBSTR self.assertTrue(s.startswith(s)) self.assertTrue(s.startswith(_('-') * size)) self.assertFalse(s.startswith(SUBSTR)) @bigmemtest(size=_2G, memuse=1) def test_strip(self, size): _ = self.from_latin1 SUBSTR = _(' abc def ghi ') s = SUBSTR.rjust(size) self.assertEqual(len(s), size) self.assertEqual(s.strip(), SUBSTR.strip()) del s s = SUBSTR.ljust(size) self.assertEqual(len(s), size) self.assertEqual(s.strip(), SUBSTR.strip()) def _test_swapcase(self, size): _ = self.from_latin1 SUBSTR = _("aBcDeFG12.'\xa9\x00") sublen = len(SUBSTR) repeats = size // sublen + 2 s = SUBSTR * repeats s = s.swapcase() self.assertEqual(len(s), sublen * repeats) self.assertEqual(s[:sublen * 3], SUBSTR.swapcase() * 3) self.assertEqual(s[-sublen * 3:], SUBSTR.swapcase() * 3) def _test_title(self, size): _ = self.from_latin1 SUBSTR = _('SpaaHAaaAaham') s = SUBSTR * (size // len(SUBSTR) + 2) s = s.title() self.assertTrue(s.startswith((SUBSTR * 3).title())) self.assertTrue(s.endswith(SUBSTR.lower() * 3)) @bigmemtest(size=_2G, memuse=2) def test_translate(self, size): _ = self.from_latin1 SUBSTR = _('aZz.z.Aaz.') trans = bytes.maketrans(b'.aZ', b'-!$') sublen = len(SUBSTR) repeats = size // sublen + 2 s = SUBSTR * repeats s = s.translate(trans) self.assertEqual(len(s), repeats * sublen) self.assertEqual(s[:sublen], SUBSTR.translate(trans)) self.assertEqual(s[-sublen:], SUBSTR.translate(trans)) self.assertEqual(s.count(_('.')), 0) self.assertEqual(s.count(_('!')), repeats * 2) self.assertEqual(s.count(_('z')), repeats * 3) @bigmemtest(size=_2G + 5, memuse=2) def test_upper(self, size): _ = self.from_latin1 s = _('a') * size s = s.upper() self.assertEqual(len(s), size) self.assertEqual(s.count(_('A')), size) @bigmemtest(size=_2G + 20, memuse=1) def test_zfill(self, size): _ = self.from_latin1 SUBSTR = _('-568324723598234') s = SUBSTR.zfill(size) self.assertTrue(s.endswith(_('0') + SUBSTR[1:])) self.assertTrue(s.startswith(_('-0'))) self.assertEqual(len(s), size) self.assertEqual(s.count(_('0')), size - len(SUBSTR)) # This test is meaningful even with size < 2G, as long as the # doubled string is > 2G (but it tests more if both are > 2G :) @bigmemtest(size=_1G + 2, memuse=3) def test_concat(self, size): _ = self.from_latin1 s = _('.') * size self.assertEqual(len(s), size) s = s + s self.assertEqual(len(s), size * 2) self.assertEqual(s.count(_('.')), size * 2) # This test is meaningful even with size < 2G, as long as the # repeated string is > 2G (but it tests more if both are > 2G :) @bigmemtest(size=_1G + 2, memuse=3) def test_repeat(self, size): _ = self.from_latin1 s = _('.') * size self.assertEqual(len(s), size) s = s * 2 self.assertEqual(len(s), size * 2) self.assertEqual(s.count(_('.')), size * 2) @bigmemtest(size=_2G + 20, memuse=2) def test_slice_and_getitem(self, size): _ = self.from_latin1 SUBSTR = _('0123456789') sublen = len(SUBSTR) s = SUBSTR * (size // sublen) stepsize = len(s) // 100 stepsize = stepsize - (stepsize % sublen) for i in range(0, len(s) - stepsize, stepsize): self.assertEqual(s[i], SUBSTR[0]) self.assertEqual(s[i:i + sublen], SUBSTR) self.assertEqual(s[i:i + sublen:2], SUBSTR[::2]) if i > 0: self.assertEqual(s[i + sublen - 1:i - 1:-3], SUBSTR[sublen::-3]) # Make sure we do some slicing and indexing near the end of the # string, too. self.assertEqual(s[len(s) - 1], SUBSTR[-1]) self.assertEqual(s[-1], SUBSTR[-1]) self.assertEqual(s[len(s) - 10], SUBSTR[0]) self.assertEqual(s[-sublen], SUBSTR[0]) self.assertEqual(s[len(s):], _('')) self.assertEqual(s[len(s) - 1:], SUBSTR[-1:]) self.assertEqual(s[-1:], SUBSTR[-1:]) self.assertEqual(s[len(s) - sublen:], SUBSTR) self.assertEqual(s[-sublen:], SUBSTR) self.assertEqual(len(s[:]), len(s)) self.assertEqual(len(s[:len(s) - 5]), len(s) - 5) self.assertEqual(len(s[5:-5]), len(s) - 10) self.assertRaises(IndexError, operator.getitem, s, len(s)) self.assertRaises(IndexError, operator.getitem, s, len(s) + 1) self.assertRaises(IndexError, operator.getitem, s, len(s) + 1<<31) @bigmemtest(size=_2G, memuse=2) def test_contains(self, size): _ = self.from_latin1 SUBSTR = _('0123456789') edge = _('-') * (size // 2) s = _('').join([edge, SUBSTR, edge]) del edge self.assertTrue(SUBSTR in s) self.assertFalse(SUBSTR * 2 in s) self.assertTrue(_('-') in s) self.assertFalse(_('a') in s) s += _('a') self.assertTrue(_('a') in s) @bigmemtest(size=_2G + 10, memuse=2) def test_compare(self, size): _ = self.from_latin1 s1 = _('-') * size s2 = _('-') * size self.assertTrue(s1 == s2) del s2 s2 = s1 + _('a') self.assertFalse(s1 == s2) del s2 s2 = _('.') * size self.assertFalse(s1 == s2) @bigmemtest(size=_2G + 10, memuse=1) def test_hash(self, size): # Not sure if we can do any meaningful tests here... Even if we # start relying on the exact algorithm used, the result will be # different depending on the size of the C 'long int'. Even this # test is dodgy (there's no *guarantee* that the two things should # have a different hash, even if they, in the current # implementation, almost always do.) _ = self.from_latin1 s = _('\x00') * size h1 = hash(s) del s s = _('\x00') * (size + 1) self.assertNotEqual(h1, hash(s)) class StrTest(unittest.TestCase, BaseStrTest): def from_latin1(self, s): return s def basic_encode_test(self, size, enc, c='.', expectedsize=None): if expectedsize is None: expectedsize = size try: s = c * size self.assertEqual(len(s.encode(enc)), expectedsize) finally: s = None def setUp(self): # HACK: adjust memory use of tests inherited from BaseStrTest # according to character size. self._adjusted = {} for name in dir(BaseStrTest): if not name.startswith('test_'): continue meth = getattr(type(self), name) try: memuse = meth.memuse except AttributeError: continue meth.memuse = ascii_char_size * memuse self._adjusted[name] = memuse def tearDown(self): for name, memuse in self._adjusted.items(): getattr(type(self), name).memuse = memuse @bigmemtest(size=_2G, memuse=ucs4_char_size * 3 + ascii_char_size * 2) def test_capitalize(self, size): self._test_capitalize(size) @bigmemtest(size=_2G, memuse=ucs4_char_size * 3 + ascii_char_size * 2) def test_title(self, size): self._test_title(size) @bigmemtest(size=_2G, memuse=ucs4_char_size * 3 + ascii_char_size * 2) def test_swapcase(self, size): self._test_swapcase(size) # Many codecs convert to the legacy representation first, explaining # why we add 'ucs4_char_size' to the 'memuse' below. @bigmemtest(size=_2G + 2, memuse=ascii_char_size + 1) def test_encode(self, size): return self.basic_encode_test(size, 'utf-8') @bigmemtest(size=_4G // 6 + 2, memuse=ascii_char_size + ucs4_char_size + 1) def test_encode_raw_unicode_escape(self, size): try: return self.basic_encode_test(size, 'raw_unicode_escape') except MemoryError: pass # acceptable on 32-bit @bigmemtest(size=_4G // 5 + 70, memuse=ascii_char_size + 8 + 1) def test_encode_utf7(self, size): try: return self.basic_encode_test(size, 'utf7') except MemoryError: pass # acceptable on 32-bit @bigmemtest(size=_4G // 4 + 5, memuse=ascii_char_size + ucs4_char_size + 4) def test_encode_utf32(self, size): try: return self.basic_encode_test(size, 'utf32', expectedsize=4 * size + 4) except MemoryError: pass # acceptable on 32-bit @bigmemtest(size=_2G - 1, memuse=ascii_char_size + 1) def test_encode_ascii(self, size): return self.basic_encode_test(size, 'ascii', c='A') # str % (...) uses a Py_UCS4 intermediate representation @bigmemtest(size=_2G + 10, memuse=ascii_char_size * 2 + ucs4_char_size) def test_format(self, size): s = '-' * size sf = '%s' % (s,) self.assertTrue(s == sf) del sf sf = '..%s..' % (s,) self.assertEqual(len(sf), len(s) + 4) self.assertTrue(sf.startswith('..-')) self.assertTrue(sf.endswith('-..')) del s, sf size //= 2 edge = '-' * size s = ''.join([edge, '%s', edge]) del edge s = s % '...' self.assertEqual(len(s), size * 2 + 3) self.assertEqual(s.count('.'), 3) self.assertEqual(s.count('-'), size * 2) @bigmemtest(size=_2G + 10, memuse=ascii_char_size * 2) def test_repr_small(self, size): s = '-' * size s = repr(s) self.assertEqual(len(s), size + 2) self.assertEqual(s[0], "'") self.assertEqual(s[-1], "'") self.assertEqual(s.count('-'), size) del s # repr() will create a string four times as large as this 'binary # string', but we don't want to allocate much more than twice # size in total. (We do extra testing in test_repr_large()) size = size // 5 * 2 s = '\x00' * size s = repr(s) self.assertEqual(len(s), size * 4 + 2) self.assertEqual(s[0], "'") self.assertEqual(s[-1], "'") self.assertEqual(s.count('\\'), size) self.assertEqual(s.count('0'), size * 2) @bigmemtest(size=_2G + 10, memuse=ascii_char_size * 5) def test_repr_large(self, size): s = '\x00' * size s = repr(s) self.assertEqual(len(s), size * 4 + 2) self.assertEqual(s[0], "'") self.assertEqual(s[-1], "'") self.assertEqual(s.count('\\'), size) self.assertEqual(s.count('0'), size * 2) # ascii() calls encode('ascii', 'backslashreplace'), which itself # creates a temporary Py_UNICODE representation in addition to the # original (Py_UCS2) one # There's also some overallocation when resizing the ascii() result # that isn't taken into account here. @bigmemtest(size=_2G // 5 + 1, memuse=ucs2_char_size + ucs4_char_size + ascii_char_size * 6) def test_unicode_repr(self, size): # Use an assigned, but not printable code point. # It is in the range of the low surrogates \uDC00-\uDFFF. char = "\uDCBA" s = char * size try: for f in (repr, ascii): r = f(s) self.assertEqual(len(r), 2 + (len(f(char)) - 2) * size) self.assertTrue(r.endswith(r"\udcba'"), r[-10:]) r = None finally: r = s = None @bigmemtest(size=_2G // 5 + 1, memuse=ucs4_char_size * 2 + ascii_char_size * 10) def test_unicode_repr_wide(self, size): char = "\U0001DCBA" s = char * size try: for f in (repr, ascii): r = f(s) self.assertEqual(len(r), 2 + (len(f(char)) - 2) * size) self.assertTrue(r.endswith(r"\U0001dcba'"), r[-12:]) r = None finally: r = s = None # The original test_translate is overridden here, so as to get the # correct size estimate: str.translate() uses an intermediate Py_UCS4 # representation. @bigmemtest(size=_2G, memuse=ascii_char_size * 2 + ucs4_char_size) def test_translate(self, size): _ = self.from_latin1 SUBSTR = _('aZz.z.Aaz.') trans = { ord(_('.')): _('-'), ord(_('a')): _('!'), ord(_('Z')): _('$'), } sublen = len(SUBSTR) repeats = size // sublen + 2 s = SUBSTR * repeats s = s.translate(trans) self.assertEqual(len(s), repeats * sublen) self.assertEqual(s[:sublen], SUBSTR.translate(trans)) self.assertEqual(s[-sublen:], SUBSTR.translate(trans)) self.assertEqual(s.count(_('.')), 0) self.assertEqual(s.count(_('!')), repeats * 2) self.assertEqual(s.count(_('z')), repeats * 3) class BytesTest(unittest.TestCase, BaseStrTest): def from_latin1(self, s): return s.encode("latin-1") @bigmemtest(size=_2G + 2, memuse=1 + ascii_char_size) def test_decode(self, size): s = self.from_latin1('.') * size self.assertEqual(len(s.decode('utf-8')), size) @bigmemtest(size=_2G, memuse=2) def test_capitalize(self, size): self._test_capitalize(size) @bigmemtest(size=_2G, memuse=2) def test_title(self, size): self._test_title(size) @bigmemtest(size=_2G, memuse=2) def test_swapcase(self, size): self._test_swapcase(size) class BytearrayTest(unittest.TestCase, BaseStrTest): def from_latin1(self, s): return bytearray(s.encode("latin-1")) @bigmemtest(size=_2G + 2, memuse=1 + ascii_char_size) def test_decode(self, size): s = self.from_latin1('.') * size self.assertEqual(len(s.decode('utf-8')), size) @bigmemtest(size=_2G, memuse=2) def test_capitalize(self, size): self._test_capitalize(size) @bigmemtest(size=_2G, memuse=2) def test_title(self, size): self._test_title(size) @bigmemtest(size=_2G, memuse=2) def test_swapcase(self, size): self._test_swapcase(size) test_hash = None test_split_large = None class TupleTest(unittest.TestCase): # Tuples have a small, fixed-sized head and an array of pointers to # data. Since we're testing 64-bit addressing, we can assume that the # pointers are 8 bytes, and that thus that the tuples take up 8 bytes # per size. # As a side-effect of testing long tuples, these tests happen to test # having more than 2<<31 references to any given object. Hence the # use of different types of objects as contents in different tests. @bigmemtest(size=_2G + 2, memuse=pointer_size * 2) def test_compare(self, size): t1 = ('',) * size t2 = ('',) * size self.assertTrue(t1 == t2) del t2 t2 = ('',) * (size + 1) self.assertFalse(t1 == t2) del t2 t2 = (1,) * size self.assertFalse(t1 == t2) # Test concatenating into a single tuple of more than 2G in length, # and concatenating a tuple of more than 2G in length separately, so # the smaller test still gets run even if there isn't memory for the # larger test (but we still let the tester know the larger test is # skipped, in verbose mode.) def basic_concat_test(self, size): t = ((),) * size self.assertEqual(len(t), size) t = t + t self.assertEqual(len(t), size * 2) @bigmemtest(size=_2G // 2 + 2, memuse=pointer_size * 3) def test_concat_small(self, size): return self.basic_concat_test(size) @bigmemtest(size=_2G + 2, memuse=pointer_size * 3) def test_concat_large(self, size): return self.basic_concat_test(size) @bigmemtest(size=_2G // 5 + 10, memuse=pointer_size * 5) def test_contains(self, size): t = (1, 2, 3, 4, 5) * size self.assertEqual(len(t), size * 5) self.assertTrue(5 in t) self.assertFalse((1, 2, 3, 4, 5) in t) self.assertFalse(0 in t) @bigmemtest(size=_2G + 10, memuse=pointer_size) def test_hash(self, size): t1 = (0,) * size h1 = hash(t1) del t1 t2 = (0,) * (size + 1) self.assertFalse(h1 == hash(t2)) @bigmemtest(size=_2G + 10, memuse=pointer_size) def test_index_and_slice(self, size): t = (None,) * size self.assertEqual(len(t), size) self.assertEqual(t[-1], None) self.assertEqual(t[5], None) self.assertEqual(t[size - 1], None) self.assertRaises(IndexError, operator.getitem, t, size) self.assertEqual(t[:5], (None,) * 5) self.assertEqual(t[-5:], (None,) * 5) self.assertEqual(t[20:25], (None,) * 5) self.assertEqual(t[-25:-20], (None,) * 5) self.assertEqual(t[size - 5:], (None,) * 5) self.assertEqual(t[size - 5:size], (None,) * 5) self.assertEqual(t[size - 6:size - 2], (None,) * 4) self.assertEqual(t[size:size], ()) self.assertEqual(t[size:size+5], ()) # Like test_concat, split in two. def basic_test_repeat(self, size): t = ('',) * size self.assertEqual(len(t), size) t = t * 2 self.assertEqual(len(t), size * 2) @bigmemtest(size=_2G // 2 + 2, memuse=pointer_size * 3) def test_repeat_small(self, size): return self.basic_test_repeat(size) @bigmemtest(size=_2G + 2, memuse=pointer_size * 3) def test_repeat_large(self, size): return self.basic_test_repeat(size) @bigmemtest(size=_1G - 1, memuse=12) def test_repeat_large_2(self, size): return self.basic_test_repeat(size) @bigmemtest(size=_1G - 1, memuse=pointer_size * 2) def test_from_2G_generator(self, size): try: t = tuple(iter([42]*size)) except MemoryError: pass # acceptable on 32-bit else: self.assertEqual(len(t), size) self.assertEqual(t[:10], (42,) * 10) self.assertEqual(t[-10:], (42,) * 10) @bigmemtest(size=_1G - 25, memuse=pointer_size * 2) def test_from_almost_2G_generator(self, size): try: t = tuple(iter([42]*size)) except MemoryError: pass # acceptable on 32-bit else: self.assertEqual(len(t), size) self.assertEqual(t[:10], (42,) * 10) self.assertEqual(t[-10:], (42,) * 10) # Like test_concat, split in two. def basic_test_repr(self, size): t = (False,) * size s = repr(t) # The repr of a tuple of Falses is exactly 7 times the tuple length. self.assertEqual(len(s), size * 7) self.assertEqual(s[:10], '(False, Fa') self.assertEqual(s[-10:], 'se, False)') @bigmemtest(size=_2G // 7 + 2, memuse=pointer_size + ascii_char_size * 7) def test_repr_small(self, size): return self.basic_test_repr(size) @bigmemtest(size=_2G + 2, memuse=pointer_size + ascii_char_size * 7) def test_repr_large(self, size): return self.basic_test_repr(size) class ListTest(unittest.TestCase): # Like tuples, lists have a small, fixed-sized head and an array of # pointers to data, so 8 bytes per size. Also like tuples, we make the # lists hold references to various objects to test their refcount # limits. @bigmemtest(size=_2G + 2, memuse=pointer_size * 2) def test_compare(self, size): l1 = [''] * size l2 = [''] * size self.assertTrue(l1 == l2) del l2 l2 = [''] * (size + 1) self.assertFalse(l1 == l2) del l2 l2 = [2] * size self.assertFalse(l1 == l2) # Test concatenating into a single list of more than 2G in length, # and concatenating a list of more than 2G in length separately, so # the smaller test still gets run even if there isn't memory for the # larger test (but we still let the tester know the larger test is # skipped, in verbose mode.) def basic_test_concat(self, size): l = [[]] * size self.assertEqual(len(l), size) l = l + l self.assertEqual(len(l), size * 2) @bigmemtest(size=_2G // 2 + 2, memuse=pointer_size * 3) def test_concat_small(self, size): return self.basic_test_concat(size) @bigmemtest(size=_2G + 2, memuse=pointer_size * 3) def test_concat_large(self, size): return self.basic_test_concat(size) # XXX This tests suffers from overallocation, just like test_append. # This should be fixed in future. def basic_test_inplace_concat(self, size): l = [sys.stdout] * size l += l self.assertEqual(len(l), size * 2) self.assertTrue(l[0] is l[-1]) self.assertTrue(l[size - 1] is l[size + 1]) @bigmemtest(size=_2G // 2 + 2, memuse=pointer_size * 2 * 9/8) def test_inplace_concat_small(self, size): return self.basic_test_inplace_concat(size) @bigmemtest(size=_2G + 2, memuse=pointer_size * 2 * 9/8) def test_inplace_concat_large(self, size): return self.basic_test_inplace_concat(size) @bigmemtest(size=_2G // 5 + 10, memuse=pointer_size * 5) def test_contains(self, size): l = [1, 2, 3, 4, 5] * size self.assertEqual(len(l), size * 5) self.assertTrue(5 in l) self.assertFalse([1, 2, 3, 4, 5] in l) self.assertFalse(0 in l) @bigmemtest(size=_2G + 10, memuse=pointer_size) def test_hash(self, size): l = [0] * size self.assertRaises(TypeError, hash, l) @bigmemtest(size=_2G + 10, memuse=pointer_size) def test_index_and_slice(self, size): l = [None] * size self.assertEqual(len(l), size) self.assertEqual(l[-1], None) self.assertEqual(l[5], None) self.assertEqual(l[size - 1], None) self.assertRaises(IndexError, operator.getitem, l, size) self.assertEqual(l[:5], [None] * 5) self.assertEqual(l[-5:], [None] * 5) self.assertEqual(l[20:25], [None] * 5) self.assertEqual(l[-25:-20], [None] * 5) self.assertEqual(l[size - 5:], [None] * 5) self.assertEqual(l[size - 5:size], [None] * 5) self.assertEqual(l[size - 6:size - 2], [None] * 4) self.assertEqual(l[size:size], []) self.assertEqual(l[size:size+5], []) l[size - 2] = 5 self.assertEqual(len(l), size) self.assertEqual(l[-3:], [None, 5, None]) self.assertEqual(l.count(5), 1) self.assertRaises(IndexError, operator.setitem, l, size, 6) self.assertEqual(len(l), size) l[size - 7:] = [1, 2, 3, 4, 5] size -= 2 self.assertEqual(len(l), size) self.assertEqual(l[-7:], [None, None, 1, 2, 3, 4, 5]) l[:7] = [1, 2, 3, 4, 5] size -= 2 self.assertEqual(len(l), size) self.assertEqual(l[:7], [1, 2, 3, 4, 5, None, None]) del l[size - 1] size -= 1 self.assertEqual(len(l), size) self.assertEqual(l[-1], 4) del l[-2:] size -= 2 self.assertEqual(len(l), size) self.assertEqual(l[-1], 2) del l[0] size -= 1 self.assertEqual(len(l), size) self.assertEqual(l[0], 2) del l[:2] size -= 2 self.assertEqual(len(l), size) self.assertEqual(l[0], 4) # Like test_concat, split in two. def basic_test_repeat(self, size): l = [] * size self.assertFalse(l) l = [''] * size self.assertEqual(len(l), size) l = l * 2 self.assertEqual(len(l), size * 2) @bigmemtest(size=_2G // 2 + 2, memuse=pointer_size * 3) def test_repeat_small(self, size): return self.basic_test_repeat(size) @bigmemtest(size=_2G + 2, memuse=pointer_size * 3) def test_repeat_large(self, size): return self.basic_test_repeat(size) # XXX This tests suffers from overallocation, just like test_append. # This should be fixed in future. def basic_test_inplace_repeat(self, size): l = [''] l *= size self.assertEqual(len(l), size) self.assertTrue(l[0] is l[-1]) del l l = [''] * size l *= 2 self.assertEqual(len(l), size * 2) self.assertTrue(l[size - 1] is l[-1]) @bigmemtest(size=_2G // 2 + 2, memuse=pointer_size * 2 * 9/8) def test_inplace_repeat_small(self, size): return self.basic_test_inplace_repeat(size) @bigmemtest(size=_2G + 2, memuse=pointer_size * 2 * 9/8) def test_inplace_repeat_large(self, size): return self.basic_test_inplace_repeat(size) def basic_test_repr(self, size): l = [False] * size s = repr(l) # The repr of a list of Falses is exactly 7 times the list length. self.assertEqual(len(s), size * 7) self.assertEqual(s[:10], '[False, Fa') self.assertEqual(s[-10:], 'se, False]') self.assertEqual(s.count('F'), size) @bigmemtest(size=_2G // 7 + 2, memuse=pointer_size + ascii_char_size * 7) def test_repr_small(self, size): return self.basic_test_repr(size) @bigmemtest(size=_2G + 2, memuse=pointer_size + ascii_char_size * 7) def test_repr_large(self, size): return self.basic_test_repr(size) # list overallocates ~1/8th of the total size (on first expansion) so # the single list.append call puts memuse at 9 bytes per size. @bigmemtest(size=_2G, memuse=pointer_size * 9/8) def test_append(self, size): l = [object()] * size l.append(object()) self.assertEqual(len(l), size+1) self.assertTrue(l[-3] is l[-2]) self.assertFalse(l[-2] is l[-1]) @bigmemtest(size=_2G // 5 + 2, memuse=pointer_size * 5) def test_count(self, size): l = [1, 2, 3, 4, 5] * size self.assertEqual(l.count(1), size) self.assertEqual(l.count("1"), 0) # XXX This tests suffers from overallocation, just like test_append. # This should be fixed in future. def basic_test_extend(self, size): l = [object] * size l.extend(l) self.assertEqual(len(l), size * 2) self.assertTrue(l[0] is l[-1]) self.assertTrue(l[size - 1] is l[size + 1]) @bigmemtest(size=_2G // 2 + 2, memuse=pointer_size * 2 * 9/8) def test_extend_small(self, size): return self.basic_test_extend(size) @bigmemtest(size=_2G + 2, memuse=pointer_size * 2 * 9/8) def test_extend_large(self, size): return self.basic_test_extend(size) @bigmemtest(size=_2G // 5 + 2, memuse=pointer_size * 5) def test_index(self, size): l = [1, 2, 3, 4, 5] * size size *= 5 self.assertEqual(l.index(1), 0) self.assertEqual(l.index(5, size - 5), size - 1) self.assertEqual(l.index(5, size - 5, size), size - 1) self.assertRaises(ValueError, l.index, 1, size - 4, size) self.assertRaises(ValueError, l.index, 6) # This tests suffers from overallocation, just like test_append. @bigmemtest(size=_2G + 10, memuse=pointer_size * 9/8) def test_insert(self, size): l = [1.0] * size l.insert(size - 1, "A") size += 1 self.assertEqual(len(l), size) self.assertEqual(l[-3:], [1.0, "A", 1.0]) l.insert(size + 1, "B") size += 1 self.assertEqual(len(l), size) self.assertEqual(l[-3:], ["A", 1.0, "B"]) l.insert(1, "C") size += 1 self.assertEqual(len(l), size) self.assertEqual(l[:3], [1.0, "C", 1.0]) self.assertEqual(l[size - 3:], ["A", 1.0, "B"]) @bigmemtest(size=_2G // 5 + 4, memuse=pointer_size * 5) def test_pop(self, size): l = ["a", "b", "c", "d", "e"] * size size *= 5 self.assertEqual(len(l), size) item = l.pop() size -= 1 self.assertEqual(len(l), size) self.assertEqual(item, "e") self.assertEqual(l[-2:], ["c", "d"]) item = l.pop(0) size -= 1 self.assertEqual(len(l), size) self.assertEqual(item, "a") self.assertEqual(l[:2], ["b", "c"]) item = l.pop(size - 2) size -= 1 self.assertEqual(len(l), size) self.assertEqual(item, "c") self.assertEqual(l[-2:], ["b", "d"]) @bigmemtest(size=_2G + 10, memuse=pointer_size) def test_remove(self, size): l = [10] * size self.assertEqual(len(l), size) l.remove(10) size -= 1 self.assertEqual(len(l), size) # Because of the earlier l.remove(), this append doesn't trigger # a resize. l.append(5) size += 1 self.assertEqual(len(l), size) self.assertEqual(l[-2:], [10, 5]) l.remove(5) size -= 1 self.assertEqual(len(l), size) self.assertEqual(l[-2:], [10, 10]) @bigmemtest(size=_2G // 5 + 2, memuse=pointer_size * 5) def test_reverse(self, size): l = [1, 2, 3, 4, 5] * size l.reverse() self.assertEqual(len(l), size * 5) self.assertEqual(l[-5:], [5, 4, 3, 2, 1]) self.assertEqual(l[:5], [5, 4, 3, 2, 1]) @bigmemtest(size=_2G // 5 + 2, memuse=pointer_size * 5 * 1.5) def test_sort(self, size): l = [1, 2, 3, 4, 5] * size l.sort() self.assertEqual(len(l), size * 5) self.assertEqual(l.count(1), size) self.assertEqual(l[:10], [1] * 10) self.assertEqual(l[-10:], [5] * 10) class DictTest(unittest.TestCase): @bigmemtest(size=357913941, memuse=160) def test_dict(self, size): # https://github.com/python/cpython/issues/102701 d = dict.fromkeys(range(size)) d[size] = 1 if __name__ == '__main__': if len(sys.argv) > 1: support.set_memlimit(sys.argv[1]) unittest.main()
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