cpython/Lib/test/string_tests.py

"""Common tests shared by test_string and test_userstring"""

import string
from test.test_support import verify, vereq, verbose, TestFailed, have_unicode

transtable = '\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037 !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`xyzdefghijklmnopqrstuvwxyz{|}~\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377'

from UserList import UserList

class Sequence:
    def __init__(self): self.seq = 'wxyz'
    def __len__(self): return len(self.seq)
    def __getitem__(self, i): return self.seq[i]

class BadSeq1(Sequence):
    def __init__(self): self.seq = [7, 'hello', 123L]

class BadSeq2(Sequence):
    def __init__(self): self.seq = ['a', 'b', 'c']
    def __len__(self): return 8

def run_module_tests(test):
    """Run all tests that exercise a function in the string module"""

    test('atoi', " 1 ", 1)
    test('atoi', " 1x", ValueError)
    test('atoi', " x1 ", ValueError)
    test('atol', "  1  ", 1L)
    test('atol', "  1x ", ValueError)
    test('atol', "  x1 ", ValueError)
    test('atof', "  1  ", 1.0)
    test('atof', "  1x ", ValueError)
    test('atof', "  x1 ", ValueError)

    test('maketrans', 'abc', transtable, 'xyz')
    test('maketrans', 'abc', ValueError, 'xyzq')

    # join now works with any sequence type
    test('join', ['a', 'b', 'c', 'd'], 'a b c d')
    test('join', ('a', 'b', 'c', 'd'), 'abcd', '')
    test('join', Sequence(), 'w x y z')
    test('join', 7, TypeError)

    test('join', BadSeq1(), TypeError)
    test('join', BadSeq2(), 'a b c')

    # try a few long ones
    print ":".join(['x' * 100] * 100)
    print ":".join(('x' * 100,) * 100)


def run_method_tests(test):
    """Run all tests that exercise a method of a string object"""

    test('capitalize', ' hello ', ' hello ')
    test('capitalize', 'hello ', 'Hello ')
    test('capitalize', 'aaaa', 'Aaaa')
    test('capitalize', 'AaAa', 'Aaaa')

    test('count', 'aaa', 3, 'a')
    test('count', 'aaa', 0, 'b')

    test('find', 'abcdefghiabc', 0, 'abc')
    test('find', 'abcdefghiabc', 9, 'abc', 1)
    test('find', 'abcdefghiabc', -1, 'def', 4)
    test('rfind', 'abcdefghiabc', 9, 'abc')
    test('lower', 'HeLLo', 'hello')
    test('lower', 'hello', 'hello')
    test('upper', 'HeLLo', 'HELLO')
    test('upper', 'HELLO', 'HELLO')

    test('title', ' hello ', ' Hello ')
    test('title', 'hello ', 'Hello ')
    test('title', "fOrMaT thIs aS titLe String", 'Format This As Title String')
    test('title', "fOrMaT,thIs-aS*titLe;String", 'Format,This-As*Title;String')
    test('title', "getInt", 'Getint')

    test('expandtabs', 'abc\rab\tdef\ng\thi', 'abc\rab      def\ng       hi')
    test('expandtabs', 'abc\rab\tdef\ng\thi', 'abc\rab      def\ng       hi', 8)
    test('expandtabs', 'abc\rab\tdef\ng\thi', 'abc\rab  def\ng   hi', 4)
    test('expandtabs', 'abc\r\nab\tdef\ng\thi', 'abc\r\nab  def\ng   hi', 4)

    test('islower', 'a', 1)
    test('islower', 'A', 0)
    test('islower', '\n', 0)
    test('islower', 'abc', 1)
    test('islower', 'aBc', 0)
    test('islower', 'abc\n', 1)

    test('isupper', 'a', 0)
    test('isupper', 'A', 1)
    test('isupper', '\n', 0)
    test('isupper', 'ABC', 1)
    test('isupper', 'AbC', 0)
    test('isupper', 'ABC\n', 1)

    test('istitle', 'a', 0)
    test('istitle', 'A', 1)
    test('istitle', '\n', 0)
    test('istitle', 'A Titlecased Line', 1)
    test('istitle', 'A\nTitlecased Line', 1)
    test('istitle', 'A Titlecased, Line', 1)
    test('istitle', 'Not a capitalized String', 0)
    test('istitle', 'Not\ta Titlecase String', 0)
    test('istitle', 'Not--a Titlecase String', 0)

    test('isalpha', 'a', 1)
    test('isalpha', 'A', 1)
    test('isalpha', '\n', 0)
    test('isalpha', 'abc', 1)
    test('isalpha', 'aBc123', 0)
    test('isalpha', 'abc\n', 0)

    test('isalnum', 'a', 1)
    test('isalnum', 'A', 1)
    test('isalnum', '\n', 0)
    test('isalnum', '123abc456', 1)
    test('isalnum', 'a1b3c', 1)
    test('isalnum', 'aBc000 ', 0)
    test('isalnum', 'abc\n', 0)

    # join now works with any sequence type
    test('join', ' ', 'a b c d', ['a', 'b', 'c', 'd'])
    test('join', '', 'abcd', ('a', 'b', 'c', 'd'))
    test('join', ' ', 'w x y z', Sequence())
    test('join', 'a', 'abc', ('abc',))
    test('join', 'a', 'z', UserList(['z']))
    if have_unicode:
        test('join', unicode('.'), unicode('a.b.c'), ['a', 'b', 'c'])
        test('join', '.', unicode('a.b.c'), [unicode('a'), 'b', 'c'])
        test('join', '.', unicode('a.b.c'), ['a', unicode('b'), 'c'])
        test('join', '.', unicode('a.b.c'), ['a', 'b', unicode('c')])
        test('join', '.', TypeError, ['a', unicode('b'), 3])
    for i in [5, 25, 125]:
        test('join', '-', ((('a' * i) + '-') * i)[:-1],
             ['a' * i] * i)

    test('join', ' ', TypeError, BadSeq1())
    test('join', ' ', 'a b c', BadSeq2())

    test('splitlines', "abc\ndef\n\rghi", ['abc', 'def', '', 'ghi'])
    test('splitlines', "abc\ndef\n\r\nghi", ['abc', 'def', '', 'ghi'])
    test('splitlines', "abc\ndef\r\nghi", ['abc', 'def', 'ghi'])
    test('splitlines', "abc\ndef\r\nghi\n", ['abc', 'def', 'ghi'])
    test('splitlines', "abc\ndef\r\nghi\n\r", ['abc', 'def', 'ghi', ''])
    test('splitlines', "\nabc\ndef\r\nghi\n\r", ['', 'abc', 'def', 'ghi', ''])
    test('splitlines', "\nabc\ndef\r\nghi\n\r", ['\n', 'abc\n', 'def\r\n', 'ghi\n', '\r'], 1)

    test('split', 'this is the split function',
         ['this', 'is', 'the', 'split', 'function'])
    test('split', 'a|b|c|d', ['a', 'b', 'c', 'd'], '|')
    test('split', 'a|b|c|d', ['a', 'b', 'c|d'], '|', 2)
    test('split', 'a b c d', ['a', 'b c d'], None, 1)
    test('split', 'a b c d', ['a', 'b', 'c d'], None, 2)
    test('split', 'a b c d', ['a', 'b', 'c', 'd'], None, 3)
    test('split', 'a b c d', ['a', 'b', 'c', 'd'], None, 4)
    test('split', 'a b c d', ['a b c d'], None, 0)
    test('split', 'a  b  c  d', ['a', 'b', 'c  d'], None, 2)
    test('split', 'a b c d ', ['a', 'b', 'c', 'd'])

    test('strip', '   hello   ', 'hello')
    test('lstrip', '   hello   ', 'hello   ')
    test('rstrip', '   hello   ', '   hello')
    test('strip', 'hello', 'hello')

    # strip/lstrip/rstrip with None arg
    test('strip', '   hello   ', 'hello', None)
    test('lstrip', '   hello   ', 'hello   ', None)
    test('rstrip', '   hello   ', '   hello', None)
    test('strip', 'hello', 'hello', None)

    # strip/lstrip/rstrip with str arg
    test('strip', 'xyzzyhelloxyzzy', 'hello', 'xyz')
    test('lstrip', 'xyzzyhelloxyzzy', 'helloxyzzy', 'xyz')
    test('rstrip', 'xyzzyhelloxyzzy', 'xyzzyhello', 'xyz')
    test('strip', 'hello', 'hello', 'xyz')

    # strip/lstrip/rstrip with unicode arg
    if have_unicode:
        test('strip', 'xyzzyhelloxyzzy',
             unicode('hello', 'ascii'), unicode('xyz', 'ascii'))
        test('lstrip', 'xyzzyhelloxyzzy',
             unicode('helloxyzzy', 'ascii'), unicode('xyz', 'ascii'))
        test('rstrip', 'xyzzyhelloxyzzy',
             unicode('xyzzyhello', 'ascii'), unicode('xyz', 'ascii'))
        test('strip', 'hello',
             unicode('hello', 'ascii'), unicode('xyz', 'ascii'))

    test('swapcase', 'HeLLo cOmpUteRs', 'hEllO CoMPuTErS')
    test('translate', 'xyzabcdef', 'xyzxyz', transtable, 'def')

    table = string.maketrans('a', 'A')
    test('translate', 'abc', 'Abc', table)
    test('translate', 'xyz', 'xyz', table)

    test('replace', 'one!two!three!', 'one@two!three!', '!', '@', 1)
    test('replace', 'one!two!three!', 'onetwothree', '!', '')
    test('replace', 'one!two!three!', 'one@two@three!', '!', '@', 2)
    test('replace', 'one!two!three!', 'one@two@three@', '!', '@', 3)
    test('replace', 'one!two!three!', 'one@two@three@', '!', '@', 4)
    test('replace', 'one!two!three!', 'one!two!three!', '!', '@', 0)
    test('replace', 'one!two!three!', 'one@two@three@', '!', '@')
    test('replace', 'one!two!three!', 'one!two!three!', 'x', '@')
    test('replace', 'one!two!three!', 'one!two!three!', 'x', '@', 2)
    test('replace', 'abc', '-a-b-c-', '', '-')
    test('replace', 'abc', '-a-b-c', '', '-', 3)
    test('replace', 'abc', 'abc', '', '-', 0)
    test('replace', '', '', '', '')
    # Next three for SF bug 422088: [OSF1 alpha] string.replace(); died with
    # MemoryError due to empty result (platform malloc issue when requesting
    # 0 bytes).
    test('replace', '123', '', '123', '')
    test('replace', '123123', '', '123', '')
    test('replace', '123x123', 'x', '123', '')

    test('startswith', 'hello', 1, 'he')
    test('startswith', 'hello', 1, 'hello')
    test('startswith', 'hello', 0, 'hello world')
    test('startswith', 'hello', 1, '')
    test('startswith', 'hello', 0, 'ello')
    test('startswith', 'hello', 1, 'ello', 1)
    test('startswith', 'hello', 1, 'o', 4)
    test('startswith', 'hello', 0, 'o', 5)
    test('startswith', 'hello', 1, '', 5)
    test('startswith', 'hello', 0, 'lo', 6)
    test('startswith', 'helloworld', 1, 'lowo', 3)
    test('startswith', 'helloworld', 1, 'lowo', 3, 7)
    test('startswith', 'helloworld', 0, 'lowo', 3, 6)

    # test negative indices in startswith
    test('startswith', 'hello', 1, 'he', 0, -1)
    test('startswith', 'hello', 1, 'he', -53, -1)
    test('startswith', 'hello', 0, 'hello', 0, -1)
    test('startswith', 'hello', 0, 'hello world', -1, -10)
    test('startswith', 'hello', 0, 'ello', -5)
    test('startswith', 'hello', 1, 'ello', -4)
    test('startswith', 'hello', 0, 'o', -2)
    test('startswith', 'hello', 1, 'o', -1)
    test('startswith', 'hello', 1, '', -3, -3)
    test('startswith', 'hello', 0, 'lo', -9)

    test('endswith', 'hello', 1, 'lo')
    test('endswith', 'hello', 0, 'he')
    test('endswith', 'hello', 1, '')
    test('endswith', 'hello', 0, 'hello world')
    test('endswith', 'helloworld', 0, 'worl')
    test('endswith', 'helloworld', 1, 'worl', 3, 9)
    test('endswith', 'helloworld', 1, 'world', 3, 12)
    test('endswith', 'helloworld', 1, 'lowo', 1, 7)
    test('endswith', 'helloworld', 1, 'lowo', 2, 7)
    test('endswith', 'helloworld', 1, 'lowo', 3, 7)
    test('endswith', 'helloworld', 0, 'lowo', 4, 7)
    test('endswith', 'helloworld', 0, 'lowo', 3, 8)
    test('endswith', 'ab', 0, 'ab', 0, 1)
    test('endswith', 'ab', 0, 'ab', 0, 0)

    # test negative indices in endswith
    test('endswith', 'hello', 1, 'lo', -2)
    test('endswith', 'hello', 0, 'he', -2)
    test('endswith', 'hello', 1, '', -3, -3)
    test('endswith', 'hello', 0, 'hello world', -10, -2)
    test('endswith', 'helloworld', 0, 'worl', -6)
    test('endswith', 'helloworld', 1, 'worl', -5, -1)
    test('endswith', 'helloworld', 1, 'worl', -5, 9)
    test('endswith', 'helloworld', 1, 'world', -7, 12)
    test('endswith', 'helloworld', 1, 'lowo', -99, -3)
    test('endswith', 'helloworld', 1, 'lowo', -8, -3)
    test('endswith', 'helloworld', 1, 'lowo', -7, -3)
    test('endswith', 'helloworld', 0, 'lowo', 3, -4)
    test('endswith', 'helloworld', 0, 'lowo', -8, -2)

    test('zfill', '123', '123', 2)
    test('zfill', '123', '123', 3)
    test('zfill', '123', '0123', 4)
    test('zfill', '+123', '+123', 3)
    test('zfill', '+123', '+123', 4)
    test('zfill', '+123', '+0123', 5)
    test('zfill', '-123', '-123', 3)
    test('zfill', '-123', '-123', 4)
    test('zfill', '-123', '-0123', 5)
    test('zfill', '', '000', 3)
    test('zfill', '34', '34', 1)
    test('zfill', '34', '0034', 4)

    test('__mod__', '+%s+', '+hello+', 'hello')
    test('__mod__', '+%d+', '+10+', 10)

    # Encoding/decoding
    codecs = [('rot13', 'uryyb jbeyq'),
              ('base64', 'aGVsbG8gd29ybGQ=\n'),
              ('hex', '68656c6c6f20776f726c64'),
              ('uu', 'begin 666 <data>\n+:&5L;&\\@=V]R;&0 \n \nend\n')]
    for encoding, data in codecs:
        test('encode', 'hello world', data, encoding)
        test('decode', data, 'hello world', encoding)
    # zlib is optional, so we make the test optional too...
    try:
        import zlib
    except ImportError:
        pass
    else:
        data = 'x\x9c\xcbH\xcd\xc9\xc9W(\xcf/\xcaI\x01\x00\x1a\x0b\x04]'
        verify('hello world'.encode('zlib') == data)
        verify(data.decode('zlib') == 'hello world')

def test_exception(lhs, rhs, msg):
    try:
        lhs in rhs
    except TypeError:
        pass
    else:
        raise TestFailed, msg

def run_contains_tests(test):
    test('__contains__', '', True, '')         # vereq('' in '', True)
    test('__contains__', 'abc', True, '')      # vereq('' in 'abc', True)
    test('__contains__', 'abc', False, '\0')   # vereq('\0' in 'abc', False)
    test('__contains__', '\0abc', True, '\0')  # vereq('\0' in '\0abc', True)
    test('__contains__', 'abc\0', True, '\0')  # vereq('\0' in 'abc\0', True)
    test('__contains__', '\0abc', True, 'a')   # vereq('a' in '\0abc', True)
    test('__contains__', 'asdf', True, 'asdf') # vereq('asdf' in 'asdf', True)
    test('__contains__', 'asd', False, 'asdf') # vereq('asdf' in 'asd', False)
    test('__contains__', '', False, 'asdf')    # vereq('asdf' in '', False)

def run_inplace_tests(constructor):
    # Verify clearing of SF bug #592573
    s = t = constructor('abc')
    s += constructor('def')
    verify(s != t, 'in-place concatenate should create a new object')