from test import test_support

from test.test_support import bigmemtest, _1G, _2G, _4G, precisionbigmemtest



import unittest

import operator

import string

import sys



# Bigmem testing houserules:

#

#  - Try not to allocate too many large objects. It's okay to rely on

#    refcounting semantics, but 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 assertEquals or similar. It's a

#    lengty 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.

#

#  - 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.

#

#  - While the bigmemtest decorator speaks of 'minsize', 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.



class StrTest(unittest.TestCase):

    @bigmemtest(minsize=_2G, memuse=2)

    def test_capitalize(self, size):

        SUBSTR = ' abc def ghi'

        s = '-' * size + SUBSTR

        caps = s.capitalize()

        self.assertEquals(caps[-len(SUBSTR):],

                         SUBSTR.capitalize())

        self.assertEquals(caps.lstrip('-'), SUBSTR)



    @bigmemtest(minsize=_2G + 10, memuse=1)

    def test_center(self, size):

        SUBSTR = ' abc def ghi'

        s = SUBSTR.center(size)

        self.assertEquals(len(s), size)

        lpadsize = rpadsize = (len(s) - len(SUBSTR)) // 2

        if len(s) % 2:

            lpadsize += 1

        self.assertEquals(s[lpadsize:-rpadsize], SUBSTR)

        self.assertEquals(s.strip(), SUBSTR.strip())



    @precisionbigmemtest(size=_2G - 1, memuse=1)

    def test_center_unicode(self, size):

        SUBSTR = u' abc def ghi'

        try:

            s = SUBSTR.center(size)

        except OverflowError:

            pass # acceptable on 32-bit

        else:

            self.assertEquals(len(s), size)

            lpadsize = rpadsize = (len(s) - len(SUBSTR)) // 2

            if len(s) % 2:

                lpadsize += 1

            self.assertEquals(s[lpadsize:-rpadsize], SUBSTR)

            self.assertEquals(s.strip(), SUBSTR.strip())

            del s



    @bigmemtest(minsize=_2G, memuse=2)

    def test_count(self, size):

        SUBSTR = ' abc def ghi'

        s = '.' * size + SUBSTR

        self.assertEquals(s.count('.'), size)

        s += '.'

        self.assertEquals(s.count('.'), size + 1)

        self.assertEquals(s.count(' '), 3)

        self.assertEquals(s.count('i'), 1)

        self.assertEquals(s.count('j'), 0)



    @bigmemtest(minsize=_2G + 2, memuse=3)

    def test_decode(self, size):

        s = '.' * size

        self.assertEquals(len(s.decode('utf-8')), size)



    def basic_encode_test(self, size, enc, c=u'.', expectedsize=None):

        if expectedsize is None:

            expectedsize = size



        s = c * size

        self.assertEquals(len(s.encode(enc)), expectedsize)



    @bigmemtest(minsize=_2G + 2, memuse=3)

    def test_encode(self, size):

        return self.basic_encode_test(size, 'utf-8')



    @precisionbigmemtest(size=_4G / 6 + 2, memuse=2)

    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



    @precisionbigmemtest(size=_4G / 5 + 70, memuse=3)

    def test_encode_utf7(self, size):

        try:

            return self.basic_encode_test(size, 'utf7')

        except MemoryError:

            pass # acceptable on 32-bit



    @precisionbigmemtest(size=_4G / 4 + 5, memuse=6)

    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



    @precisionbigmemtest(size=_2G-1, memuse=2)

    def test_decodeascii(self, size):

        return self.basic_encode_test(size, 'ascii', c='A')



    @precisionbigmemtest(size=_4G / 5, memuse=6+2)

    def test_unicode_repr_oflw(self, size):

        try:

            s = u"\uAAAA"*size

            r = repr(s)

        except MemoryError:

            pass # acceptable on 32-bit

        else:

            self.failUnless(s == eval(r))



    @bigmemtest(minsize=_2G, memuse=2)

    def test_endswith(self, size):

        SUBSTR = ' abc def ghi'

        s = '-' * size + SUBSTR

        self.failUnless(s.endswith(SUBSTR))

        self.failUnless(s.endswith(s))

        s2 = '...' + s

        self.failUnless(s2.endswith(s))

        self.failIf(s.endswith('a' + SUBSTR))

        self.failIf(SUBSTR.endswith(s))



    @bigmemtest(minsize=_2G + 10, memuse=2)

    def test_expandtabs(self, size):

        s = '-' * size

        tabsize = 8

        self.assertEquals(s.expandtabs(), s)

        del s

        slen, remainder = divmod(size, tabsize)

        s = '       \t' * slen

        s = s.expandtabs(tabsize)

        self.assertEquals(len(s), size - remainder)

        self.assertEquals(len(s.strip(' ')), 0)



    @bigmemtest(minsize=_2G, memuse=2)

    def test_find(self, size):

        SUBSTR = ' abc def ghi'

        sublen = len(SUBSTR)

        s = ''.join([SUBSTR, '-' * size, SUBSTR])

        self.assertEquals(s.find(' '), 0)

        self.assertEquals(s.find(SUBSTR), 0)

        self.assertEquals(s.find(' ', sublen), sublen + size)

        self.assertEquals(s.find(SUBSTR, len(SUBSTR)), sublen + size)

        self.assertEquals(s.find('i'), SUBSTR.find('i'))

        self.assertEquals(s.find('i', sublen),

                         sublen + size + SUBSTR.find('i'))

        self.assertEquals(s.find('i', size),

                         sublen + size + SUBSTR.find('i'))

        self.assertEquals(s.find('j'), -1)



    @bigmemtest(minsize=_2G, memuse=2)

    def test_index(self, size):

        SUBSTR = ' abc def ghi'

        sublen = len(SUBSTR)

        s = ''.join([SUBSTR, '-' * size, SUBSTR])

        self.assertEquals(s.index(' '), 0)

        self.assertEquals(s.index(SUBSTR), 0)

        self.assertEquals(s.index(' ', sublen), sublen + size)

        self.assertEquals(s.index(SUBSTR, sublen), sublen + size)

        self.assertEquals(s.index('i'), SUBSTR.index('i'))

        self.assertEquals(s.index('i', sublen),

                         sublen + size + SUBSTR.index('i'))

        self.assertEquals(s.index('i', size),

                         sublen + size + SUBSTR.index('i'))

        self.assertRaises(ValueError, s.index, 'j')



    @bigmemtest(minsize=_2G, memuse=2)

    def test_isalnum(self, size):

        SUBSTR = '123456'

        s = 'a' * size + SUBSTR

        self.failUnless(s.isalnum())

        s += '.'

        self.failIf(s.isalnum())



    @bigmemtest(minsize=_2G, memuse=2)

    def test_isalpha(self, size):

        SUBSTR = 'zzzzzzz'

        s = 'a' * size + SUBSTR

        self.failUnless(s.isalpha())

        s += '.'

        self.failIf(s.isalpha())



    @bigmemtest(minsize=_2G, memuse=2)

    def test_isdigit(self, size):

        SUBSTR = '123456'

        s = '9' * size + SUBSTR

        self.failUnless(s.isdigit())

        s += 'z'

        self.failIf(s.isdigit())



    @bigmemtest(minsize=_2G, memuse=2)

    def test_islower(self, size):

        chars = ''.join([ chr(c) for c in range(255) if not chr(c).isupper() ])

        repeats = size // len(chars) + 2

        s = chars * repeats

        self.failUnless(s.islower())

        s += 'A'

        self.failIf(s.islower())



    @bigmemtest(minsize=_2G, memuse=2)

    def test_isspace(self, size):

        whitespace = ' \f\n\r\t\v'

        repeats = size // len(whitespace) + 2

        s = whitespace * repeats

        self.failUnless(s.isspace())

        s += 'j'

        self.failIf(s.isspace())



    @bigmemtest(minsize=_2G, memuse=2)

    def test_istitle(self, size):

        SUBSTR = '123456'

        s = ''.join(['A', 'a' * size, SUBSTR])

        self.failUnless(s.istitle())

        s += 'A'

        self.failUnless(s.istitle())

        s += 'aA'

        self.failIf(s.istitle())



    @bigmemtest(minsize=_2G, memuse=2)

    def test_isupper(self, size):

        chars = ''.join([ chr(c) for c in range(255) if not chr(c).islower() ])

        repeats = size // len(chars) + 2

        s = chars * repeats

        self.failUnless(s.isupper())

        s += 'a'

        self.failIf(s.isupper())



    @bigmemtest(minsize=_2G, memuse=2)

    def test_join(self, size):

        s = 'A' * size

        x = s.join(['aaaaa', 'bbbbb'])

        self.assertEquals(x.count('a'), 5)

        self.assertEquals(x.count('b'), 5)

        self.failUnless(x.startswith('aaaaaA'))

        self.failUnless(x.endswith('Abbbbb'))



    @bigmemtest(minsize=_2G + 10, memuse=1)

    def test_ljust(self, size):

        SUBSTR = ' abc def ghi'

        s = SUBSTR.ljust(size)

        self.failUnless(s.startswith(SUBSTR + '  '))

        self.assertEquals(len(s), size)

        self.assertEquals(s.strip(), SUBSTR.strip())



    @bigmemtest(minsize=_2G + 10, memuse=2)

    def test_lower(self, size):

        s = 'A' * size

        s = s.lower()

        self.assertEquals(len(s), size)

        self.assertEquals(s.count('a'), size)



    @bigmemtest(minsize=_2G + 10, memuse=1)

    def test_lstrip(self, size):

        SUBSTR = 'abc def ghi'

        s = SUBSTR.rjust(size)

        self.assertEquals(len(s), size)

        self.assertEquals(s.lstrip(), SUBSTR.lstrip())

        del s

        s = SUBSTR.ljust(size)

        self.assertEquals(len(s), size)

        stripped = s.lstrip()

        self.failUnless(stripped is s)



    @bigmemtest(minsize=_2G + 10, memuse=2)

    def test_replace(self, size):

        replacement = 'a'

        s = ' ' * size

        s = s.replace(' ', replacement)

        self.assertEquals(len(s), size)

        self.assertEquals(s.count(replacement), size)

        s = s.replace(replacement, ' ', size - 4)

        self.assertEquals(len(s), size)

        self.assertEquals(s.count(replacement), 4)

        self.assertEquals(s[-10:], '      aaaa')



    @bigmemtest(minsize=_2G, memuse=2)

    def test_rfind(self, size):

        SUBSTR = ' abc def ghi'

        sublen = len(SUBSTR)

        s = ''.join([SUBSTR, '-' * size, SUBSTR])

        self.assertEquals(s.rfind(' '), sublen + size + SUBSTR.rfind(' '))

        self.assertEquals(s.rfind(SUBSTR), sublen + size)

        self.assertEquals(s.rfind(' ', 0, size), SUBSTR.rfind(' '))

        self.assertEquals(s.rfind(SUBSTR, 0, sublen + size), 0)

        self.assertEquals(s.rfind('i'), sublen + size + SUBSTR.rfind('i'))

        self.assertEquals(s.rfind('i', 0, sublen), SUBSTR.rfind('i'))

        self.assertEquals(s.rfind('i', 0, sublen + size),

                          SUBSTR.rfind('i'))

        self.assertEquals(s.rfind('j'), -1)



    @bigmemtest(minsize=_2G, memuse=2)

    def test_rindex(self, size):

        SUBSTR = ' abc def ghi'

        sublen = len(SUBSTR)

        s = ''.join([SUBSTR, '-' * size, SUBSTR])

        self.assertEquals(s.rindex(' '),

                          sublen + size + SUBSTR.rindex(' '))

        self.assertEquals(s.rindex(SUBSTR), sublen + size)

        self.assertEquals(s.rindex(' ', 0, sublen + size - 1),

                          SUBSTR.rindex(' '))

        self.assertEquals(s.rindex(SUBSTR, 0, sublen + size), 0)

        self.assertEquals(s.rindex('i'),

                          sublen + size + SUBSTR.rindex('i'))

        self.assertEquals(s.rindex('i', 0, sublen), SUBSTR.rindex('i'))

        self.assertEquals(s.rindex('i', 0, sublen + size),

                          SUBSTR.rindex('i'))

        self.assertRaises(ValueError, s.rindex, 'j')



    @bigmemtest(minsize=_2G + 10, memuse=1)

    def test_rjust(self, size):

        SUBSTR = ' abc def ghi'

        s = SUBSTR.ljust(size)

        self.failUnless(s.startswith(SUBSTR + '  '))

        self.assertEquals(len(s), size)

        self.assertEquals(s.strip(), SUBSTR.strip())



    @bigmemtest(minsize=_2G + 10, memuse=1)

    def test_rstrip(self, size):

        SUBSTR = ' abc def ghi'

        s = SUBSTR.ljust(size)

        self.assertEquals(len(s), size)

        self.assertEquals(s.rstrip(), SUBSTR.rstrip())

        del s

        s = SUBSTR.rjust(size)

        self.assertEquals(len(s), size)

        stripped = s.rstrip()

        self.failUnless(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(minsize=_2G, memuse=2.1)

    def test_split_small(self, size):

        # 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.assertEquals(len(l), chunksize)

        self.assertEquals(set(l), set(['a']))

        del l

        l = s.split('a')

        self.assertEquals(len(l), chunksize + 1)

        self.assertEquals(set(l), set(['', ' ' * chunksize]))



    # 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(minsize=_2G + 5, memuse=10)

    def test_split_large(self, size):

        s = ' a' * size + ' '

        l = s.split()

        self.assertEquals(len(l), size)

        self.assertEquals(set(l), set(['a']))

        del l

        l = s.split('a')

        self.assertEquals(len(l), size + 1)

        self.assertEquals(set(l), set([' ']))



    @bigmemtest(minsize=_2G, memuse=2.1)

    def test_splitlines(self, size):

        # 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

        l = s.splitlines()

        self.assertEquals(len(l), chunksize * 2)

        self.assertEquals(set(l), set([' ' * chunksize]))



    @bigmemtest(minsize=_2G, memuse=2)

    def test_startswith(self, size):

        SUBSTR = ' abc def ghi'

        s = '-' * size + SUBSTR

        self.failUnless(s.startswith(s))

        self.failUnless(s.startswith('-' * size))

        self.failIf(s.startswith(SUBSTR))



    @bigmemtest(minsize=_2G, memuse=1)

    def test_strip(self, size):

        SUBSTR = '   abc def ghi   '

        s = SUBSTR.rjust(size)

        self.assertEquals(len(s), size)

        self.assertEquals(s.strip(), SUBSTR.strip())

        del s

        s = SUBSTR.ljust(size)

        self.assertEquals(len(s), size)

        self.assertEquals(s.strip(), SUBSTR.strip())



    @bigmemtest(minsize=_2G, memuse=2)

    def test_swapcase(self, size):

        SUBSTR = "aBcDeFG12.'\xa9\x00"

        sublen = len(SUBSTR)

        repeats = size // sublen + 2

        s = SUBSTR * repeats

        s = s.swapcase()

        self.assertEquals(len(s), sublen * repeats)

        self.assertEquals(s[:sublen * 3], SUBSTR.swapcase() * 3)

        self.assertEquals(s[-sublen * 3:], SUBSTR.swapcase() * 3)



    @bigmemtest(minsize=_2G, memuse=2)

    def test_title(self, size):

        SUBSTR = 'SpaaHAaaAaham'

        s = SUBSTR * (size // len(SUBSTR) + 2)

        s = s.title()

        self.failUnless(s.startswith((SUBSTR * 3).title()))

        self.failUnless(s.endswith(SUBSTR.lower() * 3))



    @bigmemtest(minsize=_2G, memuse=2)

    def test_translate(self, size):

        trans = string.maketrans('.aZ', '-!$')

        SUBSTR = 'aZz.z.Aaz.'

        sublen = len(SUBSTR)

        repeats = size // sublen + 2

        s = SUBSTR * repeats

        s = s.translate(trans)

        self.assertEquals(len(s), repeats * sublen)

        self.assertEquals(s[:sublen], SUBSTR.translate(trans))

        self.assertEquals(s[-sublen:], SUBSTR.translate(trans))

        self.assertEquals(s.count('.'), 0)

        self.assertEquals(s.count('!'), repeats * 2)

        self.assertEquals(s.count('z'), repeats * 3)



    @bigmemtest(minsize=_2G + 5, memuse=2)

    def test_upper(self, size):

        s = 'a' * size

        s = s.upper()

        self.assertEquals(len(s), size)

        self.assertEquals(s.count('A'), size)



    @bigmemtest(minsize=_2G + 20, memuse=1)

    def test_zfill(self, size):

        SUBSTR = '-568324723598234'

        s = SUBSTR.zfill(size)

        self.failUnless(s.endswith('0' + SUBSTR[1:]))

        self.failUnless(s.startswith('-0'))

        self.assertEquals(len(s), size)

        self.assertEquals(s.count('0'), size - len(SUBSTR))



    @bigmemtest(minsize=_2G + 10, memuse=2)

    def test_format(self, size):

        s = '-' * size

        sf = '%s' % (s,)

        self.failUnless(s == sf)

        del sf

        sf = '..%s..' % (s,)

        self.assertEquals(len(sf), len(s) + 4)

        self.failUnless(sf.startswith('..-'))

        self.failUnless(sf.endswith('-..'))

        del s, sf



        size //= 2

        edge = '-' * size

        s = ''.join([edge, '%s', edge])

        del edge

        s = s % '...'

        self.assertEquals(len(s), size * 2 + 3)

        self.assertEquals(s.count('.'), 3)

        self.assertEquals(s.count('-'), size * 2)



    @bigmemtest(minsize=_2G + 10, memuse=2)

    def test_repr_small(self, size):

        s = '-' * size

        s = repr(s)

        self.assertEquals(len(s), size + 2)

        self.assertEquals(s[0], "'")

        self.assertEquals(s[-1], "'")

        self.assertEquals(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.assertEquals(len(s), size * 4 + 2)

        self.assertEquals(s[0], "'")

        self.assertEquals(s[-1], "'")

        self.assertEquals(s.count('\\'), size)

        self.assertEquals(s.count('0'), size * 2)



    @bigmemtest(minsize=_2G + 10, memuse=5)

    def test_repr_large(self, size):

        s = '\x00' * size

        s = repr(s)

        self.assertEquals(len(s), size * 4 + 2)

        self.assertEquals(s[0], "'")

        self.assertEquals(s[-1], "'")

        self.assertEquals(s.count('\\'), size)

        self.assertEquals(s.count('0'), size * 2)



    @bigmemtest(minsize=2**32 / 5, memuse=6+2)

    def test_unicode_repr(self, size):

        s = u"\uAAAA" * size

        self.failUnless(len(repr(s)) > size)



    # 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(minsize=_1G + 2, memuse=3)

    def test_concat(self, size):

        s = '.' * size

        self.assertEquals(len(s), size)

        s = s + s

        self.assertEquals(len(s), size * 2)

        self.assertEquals(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(minsize=_1G + 2, memuse=3)

    def test_repeat(self, size):

        s = '.' * size

        self.assertEquals(len(s), size)

        s = s * 2

        self.assertEquals(len(s), size * 2)

        self.assertEquals(s.count('.'), size * 2)



    @bigmemtest(minsize=_2G + 20, memuse=1)

    def test_slice_and_getitem(self, size):

        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.assertEquals(s[i], SUBSTR[0])

            self.assertEquals(s[i:i + sublen], SUBSTR)

            self.assertEquals(s[i:i + sublen:2], SUBSTR[::2])

            if i > 0:

                self.assertEquals(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.assertEquals(s[len(s) - 1], SUBSTR[-1])

        self.assertEquals(s[-1], SUBSTR[-1])

        self.assertEquals(s[len(s) - 10], SUBSTR[0])

        self.assertEquals(s[-sublen], SUBSTR[0])

        self.assertEquals(s[len(s):], '')

        self.assertEquals(s[len(s) - 1:], SUBSTR[-1])

        self.assertEquals(s[-1:], SUBSTR[-1])

        self.assertEquals(s[len(s) - sublen:], SUBSTR)

        self.assertEquals(s[-sublen:], SUBSTR)

        self.assertEquals(len(s[:]), len(s))

        self.assertEquals(len(s[:len(s) - 5]), len(s) - 5)

        self.assertEquals(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(minsize=_2G, memuse=2)

    def test_contains(self, size):

        SUBSTR = '0123456789'

        edge = '-' * (size // 2)

        s = ''.join([edge, SUBSTR, edge])

        del edge

        self.failUnless(SUBSTR in s)

        self.failIf(SUBSTR * 2 in s)

        self.failUnless('-' in s)

        self.failIf('a' in s)

        s += 'a'

        self.failUnless('a' in s)



    @bigmemtest(minsize=_2G + 10, memuse=2)

    def test_compare(self, size):

        s1 = '-' * size

        s2 = '-' * size

        self.failUnless(s1 == s2)

        del s2

        s2 = s1 + 'a'

        self.failIf(s1 == s2)

        del s2

        s2 = '.' * size

        self.failIf(s1 == s2)



    @bigmemtest(minsize=_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.)

        s = '\x00' * size

        h1 = hash(s)

        del s

        s = '\x00' * (size + 1)

        self.failIf(h1 == hash(s))



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(minsize=_2G + 2, memuse=16)

    def test_compare(self, size):

        t1 = (u'',) * size

        t2 = (u'',) * size

        self.failUnless(t1 == t2)

        del t2

        t2 = (u'',) * (size + 1)

        self.failIf(t1 == t2)

        del t2

        t2 = (1,) * size

        self.failIf(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.assertEquals(len(t), size)

        t = t + t

        self.assertEquals(len(t), size * 2)



    @bigmemtest(minsize=_2G // 2 + 2, memuse=24)

    def test_concat_small(self, size):

        return self.basic_concat_test(size)



    @bigmemtest(minsize=_2G + 2, memuse=24)

    def test_concat_large(self, size):

        return self.basic_concat_test(size)



    @bigmemtest(minsize=_2G // 5 + 10, memuse=8 * 5)

    def test_contains(self, size):

        t = (1, 2, 3, 4, 5) * size

        self.assertEquals(len(t), size * 5)

        self.failUnless(5 in t)

        self.failIf((1, 2, 3, 4, 5) in t)

        self.failIf(0 in t)



    @bigmemtest(minsize=_2G + 10, memuse=8)

    def test_hash(self, size):

        t1 = (0,) * size

        h1 = hash(t1)

        del t1

        t2 = (0,) * (size + 1)

        self.failIf(h1 == hash(t2))



    @bigmemtest(minsize=_2G + 10, memuse=8)

    def test_index_and_slice(self, size):

        t = (None,) * size

        self.assertEquals(len(t), size)

        self.assertEquals(t[-1], None)

        self.assertEquals(t[5], None)

        self.assertEquals(t[size - 1], None)

        self.assertRaises(IndexError, operator.getitem, t, size)

        self.assertEquals(t[:5], (None,) * 5)

        self.assertEquals(t[-5:], (None,) * 5)

        self.assertEquals(t[20:25], (None,) * 5)

        self.assertEquals(t[-25:-20], (None,) * 5)

        self.assertEquals(t[size - 5:], (None,) * 5)

        self.assertEquals(t[size - 5:size], (None,) * 5)

        self.assertEquals(t[size - 6:size - 2], (None,) * 4)

        self.assertEquals(t[size:size], ())

        self.assertEquals(t[size:size+5], ())



    # Like test_concat, split in two.

    def basic_test_repeat(self, size):

        t = ('',) * size

        self.assertEquals(len(t), size)

        t = t * 2

        self.assertEquals(len(t), size * 2)



    @bigmemtest(minsize=_2G // 2 + 2, memuse=24)

    def test_repeat_small(self, size):

        return self.basic_test_repeat(size)



    @bigmemtest(minsize=_2G + 2, memuse=24)

    def test_repeat_large(self, size):

        return self.basic_test_repeat(size)



    @bigmemtest(minsize=_1G - 1, memuse=12)

    def test_repeat_large_2(self, size):

        return self.basic_test_repeat(size)



    @precisionbigmemtest(size=_1G - 1, memuse=9)

    def test_from_2G_generator(self, size):

        try:

            t = tuple(xrange(size))

        except MemoryError:

            pass # acceptable on 32-bit

        else:

            count = 0

            for item in t:

                self.assertEquals(item, count)

                count += 1

            self.assertEquals(count, size)



    @precisionbigmemtest(size=_1G - 25, memuse=9)

    def test_from_almost_2G_generator(self, size):

        try:

            t = tuple(xrange(size))

            count = 0

            for item in t:

                self.assertEquals(item, count)

                count += 1

            self.assertEquals(count, size)

        except MemoryError:

            pass # acceptable, expected on 32-bit



    # Like test_concat, split in two.

    def basic_test_repr(self, size):

        t = (0,) * size

        s = repr(t)

        # The repr of a tuple of 0's is exactly three times the tuple length.

        self.assertEquals(len(s), size * 3)

        self.assertEquals(s[:5], '(0, 0')

        self.assertEquals(s[-5:], '0, 0)')

        self.assertEquals(s.count('0'), size)



    @bigmemtest(minsize=_2G // 3 + 2, memuse=8 + 3)

    def test_repr_small(self, size):

        return self.basic_test_repr(size)



    @bigmemtest(minsize=_2G + 2, memuse=8 + 3)

    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(minsize=_2G + 2, memuse=16)

    def test_compare(self, size):

        l1 = [u''] * size

        l2 = [u''] * size

        self.failUnless(l1 == l2)

        del l2

        l2 = [u''] * (size + 1)

        self.failIf(l1 == l2)

        del l2

        l2 = [2] * size

        self.failIf(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.assertEquals(len(l), size)

        l = l + l

        self.assertEquals(len(l), size * 2)



    @bigmemtest(minsize=_2G // 2 + 2, memuse=24)

    def test_concat_small(self, size):

        return self.basic_test_concat(size)



    @bigmemtest(minsize=_2G + 2, memuse=24)

    def test_concat_large(self, size):

        return self.basic_test_concat(size)



    def basic_test_inplace_concat(self, size):

        l = [sys.stdout] * size

        l += l

        self.assertEquals(len(l), size * 2)

        self.failUnless(l[0] is l[-1])

        self.failUnless(l[size - 1] is l[size + 1])



    @bigmemtest(minsize=_2G // 2 + 2, memuse=24)

    def test_inplace_concat_small(self, size):

        return self.basic_test_inplace_concat(size)



    @bigmemtest(minsize=_2G + 2, memuse=24)

    def test_inplace_concat_large(self, size):

        return self.basic_test_inplace_concat(size)



    @bigmemtest(minsize=_2G // 5 + 10, memuse=8 * 5)

    def test_contains(self, size):

        l = [1, 2, 3, 4, 5] * size

        self.assertEquals(len(l), size * 5)

        self.failUnless(5 in l)

        self.failIf([1, 2, 3, 4, 5] in l)

        self.failIf(0 in l)



    @bigmemtest(minsize=_2G + 10, memuse=8)

    def test_hash(self, size):

        l = [0] * size

        self.failUnlessRaises(TypeError, hash, l)



    @bigmemtest(minsize=_2G + 10, memuse=8)

    def test_index_and_slice(self, size):

        l = [None] * size

        self.assertEquals(len(l), size)

        self.assertEquals(l[-1], None)

        self.assertEquals(l[5], None)

        self.assertEquals(l[size - 1], None)

        self.assertRaises(IndexError, operator.getitem, l, size)

        self.assertEquals(l[:5], [None] * 5)

        self.assertEquals(l[-5:], [None] * 5)

        self.assertEquals(l[20:25], [None] * 5)

        self.assertEquals(l[-25:-20], [None] * 5)

        self.assertEquals(l[size - 5:], [None] * 5)

        self.assertEquals(l[size - 5:size], [None] * 5)

        self.assertEquals(l[size - 6:size - 2], [None] * 4)

        self.assertEquals(l[size:size], [])

        self.assertEquals(l[size:size+5], [])



        l[size - 2] = 5

        self.assertEquals(len(l), size)

        self.assertEquals(l[-3:], [None, 5, None])

        self.assertEquals(l.count(5), 1)

        self.assertRaises(IndexError, operator.setitem, l, size, 6)

        self.assertEquals(len(l), size)



        l[size - 7:] = [1, 2, 3, 4, 5]

        size -= 2

        self.assertEquals(len(l), size)

        self.assertEquals(l[-7:], [None, None, 1, 2, 3, 4, 5])



        l[:7] = [1, 2, 3, 4, 5]

        size -= 2

        self.assertEquals(len(l), size)

        self.assertEquals(l[:7], [1, 2, 3, 4, 5, None, None])



        del l[size - 1]

        size -= 1

        self.assertEquals(len(l), size)

        self.assertEquals(l[-1], 4)



        del l[-2:]

        size -= 2

        self.assertEquals(len(l), size)

        self.assertEquals(l[-1], 2)



        del l[0]

        size -= 1

        self.assertEquals(len(l), size)

        self.assertEquals(l[0], 2)



        del l[:2]

        size -= 2

        self.assertEquals(len(l), size)

        self.assertEquals(l[0], 4)



    # Like test_concat, split in two.

    def basic_test_repeat(self, size):

        l = [] * size

        self.failIf(l)

        l = [''] * size

        self.assertEquals(len(l), size)

        l = l * 2

        self.assertEquals(len(l), size * 2)



    @bigmemtest(minsize=_2G // 2 + 2, memuse=24)

    def test_repeat_small(self, size):

        return self.basic_test_repeat(size)



    @bigmemtest(minsize=_2G + 2, memuse=24)

    def test_repeat_large(self, size):

        return self.basic_test_repeat(size)



    def basic_test_inplace_repeat(self, size):

        l = ['']

        l *= size

        self.assertEquals(len(l), size)

        self.failUnless(l[0] is l[-1])

        del l



        l = [''] * size

        l *= 2

        self.assertEquals(len(l), size * 2)

        self.failUnless(l[size - 1] is l[-1])



    @bigmemtest(minsize=_2G // 2 + 2, memuse=16)

    def test_inplace_repeat_small(self, size):

        return self.basic_test_inplace_repeat(size)



    @bigmemtest(minsize=_2G + 2, memuse=16)

    def test_inplace_repeat_large(self, size):

        return self.basic_test_inplace_repeat(size)



    def basic_test_repr(self, size):

        l = [0] * size

        s = repr(l)

        # The repr of a list of 0's is exactly three times the list length.

        self.assertEquals(len(s), size * 3)

        self.assertEquals(s[:5], '[0, 0')

        self.assertEquals(s[-5:], '0, 0]')

        self.assertEquals(s.count('0'), size)



    @bigmemtest(minsize=_2G // 3 + 2, memuse=8 + 3)

    def test_repr_small(self, size):

        return self.basic_test_repr(size)



    @bigmemtest(minsize=_2G + 2, memuse=8 + 3)

    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(minsize=_2G, memuse=9)

    def test_append(self, size):

        l = [object()] * size

        l.append(object())

        self.assertEquals(len(l), size+1)

        self.failUnless(l[-3] is l[-2])

        self.failIf(l[-2] is l[-1])



    @bigmemtest(minsize=_2G // 5 + 2, memuse=8 * 5)

    def test_count(self, size):

        l = [1, 2, 3, 4, 5] * size

        self.assertEquals(l.count(1), size)

        self.assertEquals(l.count("1"), 0)



    def basic_test_extend(self, size):

        l = [file] * size

        l.extend(l)

        self.assertEquals(len(l), size * 2)

        self.failUnless(l[0] is l[-1])

        self.failUnless(l[size - 1] is l[size + 1])



    @bigmemtest(minsize=_2G // 2 + 2, memuse=16)

    def test_extend_small(self, size):

        return self.basic_test_extend(size)



    @bigmemtest(minsize=_2G + 2, memuse=16)

    def test_extend_large(self, size):

        return self.basic_test_extend(size)



    @bigmemtest(minsize=_2G // 5 + 2, memuse=8 * 5)

    def test_index(self, size):

        l = [1L, 2L, 3L, 4L, 5L] * size

        size *= 5

        self.assertEquals(l.index(1), 0)

        self.assertEquals(l.index(5, size - 5), size - 1)

        self.assertEquals(l.index(5, size - 5, size), size - 1)

        self.assertRaises(ValueError, l.index, 1, size - 4, size)

        self.assertRaises(ValueError, l.index, 6L)



    # This tests suffers from overallocation, just like test_append.

    @bigmemtest(minsize=_2G + 10, memuse=9)

    def test_insert(self, size):

        l = [1.0] * size

        l.insert(size - 1, "A")

        size += 1

        self.assertEquals(len(l), size)

        self.assertEquals(l[-3:], [1.0, "A", 1.0])



        l.insert(size + 1, "B")

        size += 1

        self.assertEquals(len(l), size)

        self.assertEquals(l[-3:], ["A", 1.0, "B"])



        l.insert(1, "C")

        size += 1

        self.assertEquals(len(l), size)

        self.assertEquals(l[:3], [1.0, "C", 1.0])

        self.assertEquals(l[size - 3:], ["A", 1.0, "B"])



    @bigmemtest(minsize=_2G // 5 + 4, memuse=8 * 5)

    def test_pop(self, size):

        l = [u"a", u"b", u"c", u"d", u"e"] * size

        size *= 5

        self.assertEquals(len(l), size)



        item = l.pop()

        size -= 1

        self.assertEquals(len(l), size)

        self.assertEquals(item, u"e")

        self.assertEquals(l[-2:], [u"c", u"d"])



        item = l.pop(0)

        size -= 1

        self.assertEquals(len(l), size)

        self.assertEquals(item, u"a")

        self.assertEquals(l[:2], [u"b", u"c"])



        item = l.pop(size - 2)

        size -= 1

        self.assertEquals(len(l), size)

        self.assertEquals(item, u"c")

        self.assertEquals(l[-2:], [u"b", u"d"])



    @bigmemtest(minsize=_2G + 10, memuse=8)

    def test_remove(self, size):

        l = [10] * size

        self.assertEquals(len(l), size)



        l.remove(10)

        size -= 1

        self.assertEquals(len(l), size)



        # Because of the earlier l.remove(), this append doesn't trigger

        # a resize.

        l.append(5)

        size += 1

        self.assertEquals(len(l), size)

        self.assertEquals(l[-2:], [10, 5])

        l.remove(5)

        size -= 1

        self.assertEquals(len(l), size)

        self.assertEquals(l[-2:], [10, 10])



    @bigmemtest(minsize=_2G // 5 + 2, memuse=8 * 5)

    def test_reverse(self, size):

        l = [1, 2, 3, 4, 5] * size

        l.reverse()

        self.assertEquals(len(l), size * 5)

        self.assertEquals(l[-5:], [5, 4, 3, 2, 1])

        self.assertEquals(l[:5], [5, 4, 3, 2, 1])



    @bigmemtest(minsize=_2G // 5 + 2, memuse=8 * 5)

    def test_sort(self, size):

        l = [1, 2, 3, 4, 5] * size

        l.sort()

        self.assertEquals(len(l), size * 5)

        self.assertEquals(l.count(1), size)

        self.assertEquals(l[:10], [1] * 10)

        self.assertEquals(l[-10:], [5] * 10)



class BufferTest(unittest.TestCase):



    @precisionbigmemtest(size=_1G, memuse=4)

    def test_repeat(self, size):

        try:

            b = buffer("AAAA")*size

        except MemoryError:

            pass # acceptable on 32-bit

        else:

            count = 0

            for c in b:

                self.assertEquals(c, 'A')

                count += 1

            self.assertEquals(count, size*4)



def test_main():

    test_support.run_unittest(StrTest, TupleTest, ListTest, BufferTest)



if __name__ == '__main__':

    if len(sys.argv) > 1:

        test_support.set_memlimit(sys.argv[1])

    test_main()

