AppPkg/Applications/Python/Python-2.7.2/Lib/test/string_tests.py

   1 """
   2 Common tests shared by test_str, test_unicode, test_userstring and test_string.
   3 """
   4
   5 import unittest, string, sys, struct
   6 from test import test_support
   7 from UserList import UserList
   8
   9 class Sequence:
  10     def __init__(self, seq='wxyz'): self.seq = seq
  11     def __len__(self): return len(self.seq)
  12     def __getitem__(self, i): return self.seq[i]
  13
  14 class BadSeq1(Sequence):
  15     def __init__(self): self.seq = [7, 'hello', 123L]
  16
  17 class BadSeq2(Sequence):
  18     def __init__(self): self.seq = ['a', 'b', 'c']
  19     def __len__(self): return 8
  20
  21 class CommonTest(unittest.TestCase):
  22     # This testcase contains test that can be used in all
  23     # stringlike classes. Currently this is str, unicode
  24     # UserString and the string module.
  25
  26     # The type to be tested
  27     # Change in subclasses to change the behaviour of fixtesttype()
  28     type2test = None
  29
  30     # All tests pass their arguments to the testing methods
  31     # as str objects. fixtesttype() can be used to propagate
  32     # these arguments to the appropriate type
  33     def fixtype(self, obj):
  34         if isinstance(obj, str):
  35             return self.__class__.type2test(obj)
  36         elif isinstance(obj, list):
  37             return [self.fixtype(x) for x in obj]
  38         elif isinstance(obj, tuple):
  39             return tuple([self.fixtype(x) for x in obj])
  40         elif isinstance(obj, dict):
  41             return dict([
  42                (self.fixtype(key), self.fixtype(value))
  43                for (key, value) in obj.iteritems()
  44             ])
  45         else:
  46             return obj
  47
  48     # check that object.method(*args) returns result
  49     def checkequal(self, result, object, methodname, *args):
  50         result = self.fixtype(result)
  51         object = self.fixtype(object)
  52         args = self.fixtype(args)
  53         realresult = getattr(object, methodname)(*args)
  54         self.assertEqual(
  55             result,
  56             realresult
  57         )
  58         # if the original is returned make sure that
  59         # this doesn't happen with subclasses
  60         if object == realresult:
  61             class subtype(self.__class__.type2test):
  62                 pass
  63             object = subtype(object)
  64             realresult = getattr(object, methodname)(*args)
  65             self.assertTrue(object is not realresult)
  66
  67     # check that object.method(*args) raises exc
  68     def checkraises(self, exc, object, methodname, *args):
  69         object = self.fixtype(object)
  70         args = self.fixtype(args)
  71         self.assertRaises(
  72             exc,
  73             getattr(object, methodname),
  74             *args
  75         )
  76
  77     # call object.method(*args) without any checks
  78     def checkcall(self, object, methodname, *args):
  79         object = self.fixtype(object)
  80         args = self.fixtype(args)
  81         getattr(object, methodname)(*args)
  82
  83     def test_hash(self):
  84         # SF bug 1054139:  += optimization was not invalidating cached hash value
  85         a = self.type2test('DNSSEC')
  86         b = self.type2test('')
  87         for c in a:
  88             b += c
  89             hash(b)
  90         self.assertEqual(hash(a), hash(b))
  91
  92     def test_capitalize(self):
  93         self.checkequal(' hello ', ' hello ', 'capitalize')
  94         self.checkequal('Hello ', 'Hello ','capitalize')
  95         self.checkequal('Hello ', 'hello ','capitalize')
  96         self.checkequal('Aaaa', 'aaaa', 'capitalize')
  97         self.checkequal('Aaaa', 'AaAa', 'capitalize')
  98
  99         self.checkraises(TypeError, 'hello', 'capitalize', 42)
 100
 101     def test_count(self):
 102         self.checkequal(3, 'aaa', 'count', 'a')
 103         self.checkequal(0, 'aaa', 'count', 'b')
 104         self.checkequal(3, 'aaa', 'count', 'a')
 105         self.checkequal(0, 'aaa', 'count', 'b')
 106         self.checkequal(3, 'aaa', 'count', 'a')
 107         self.checkequal(0, 'aaa', 'count', 'b')
 108         self.checkequal(0, 'aaa', 'count', 'b')
 109         self.checkequal(2, 'aaa', 'count', 'a', 1)
 110         self.checkequal(0, 'aaa', 'count', 'a', 10)
 111         self.checkequal(1, 'aaa', 'count', 'a', -1)
 112         self.checkequal(3, 'aaa', 'count', 'a', -10)
 113         self.checkequal(1, 'aaa', 'count', 'a', 0, 1)
 114         self.checkequal(3, 'aaa', 'count', 'a', 0, 10)
 115         self.checkequal(2, 'aaa', 'count', 'a', 0, -1)
 116         self.checkequal(0, 'aaa', 'count', 'a', 0, -10)
 117         self.checkequal(3, 'aaa', 'count', '', 1)
 118         self.checkequal(1, 'aaa', 'count', '', 3)
 119         self.checkequal(0, 'aaa', 'count', '', 10)
 120         self.checkequal(2, 'aaa', 'count', '', -1)
 121         self.checkequal(4, 'aaa', 'count', '', -10)
 122
 123         self.checkequal(1, '', 'count', '')
 124         self.checkequal(0, '', 'count', '', 1, 1)
 125         self.checkequal(0, '', 'count', '', sys.maxint, 0)
 126
 127         self.checkequal(0, '', 'count', 'xx')
 128         self.checkequal(0, '', 'count', 'xx', 1, 1)
 129         self.checkequal(0, '', 'count', 'xx', sys.maxint, 0)
 130
 131         self.checkraises(TypeError, 'hello', 'count')
 132         self.checkraises(TypeError, 'hello', 'count', 42)
 133
 134         # For a variety of combinations,
 135         #    verify that str.count() matches an equivalent function
 136         #    replacing all occurrences and then differencing the string lengths
 137         charset = ['', 'a', 'b']
 138         digits = 7
 139         base = len(charset)
 140         teststrings = set()
 141         for i in xrange(base ** digits):
 142             entry = []
 143             for j in xrange(digits):
 144                 i, m = divmod(i, base)
 145                 entry.append(charset[m])
 146             teststrings.add(''.join(entry))
 147         teststrings = list(teststrings)
 148         for i in teststrings:
 149             i = self.fixtype(i)
 150             n = len(i)
 151             for j in teststrings:
 152                 r1 = i.count(j)
 153                 if j:
 154                     r2, rem = divmod(n - len(i.replace(j, '')), len(j))
 155                 else:
 156                     r2, rem = len(i)+1, 0
 157                 if rem or r1 != r2:
 158                     self.assertEqual(rem, 0, '%s != 0 for %s' % (rem, i))
 159                     self.assertEqual(r1, r2, '%s != %s for %s' % (r1, r2, i))
 160
 161     def test_find(self):
 162         self.checkequal(0, 'abcdefghiabc', 'find', 'abc')
 163         self.checkequal(9, 'abcdefghiabc', 'find', 'abc', 1)
 164         self.checkequal(-1, 'abcdefghiabc', 'find', 'def', 4)
 165
 166         self.checkequal(0, 'abc', 'find', '', 0)
 167         self.checkequal(3, 'abc', 'find', '', 3)
 168         self.checkequal(-1, 'abc', 'find', '', 4)
 169
 170         # to check the ability to pass None as defaults
 171         self.checkequal( 2, 'rrarrrrrrrrra', 'find', 'a')
 172         self.checkequal(12, 'rrarrrrrrrrra', 'find', 'a', 4)
 173         self.checkequal(-1, 'rrarrrrrrrrra', 'find', 'a', 4, 6)
 174         self.checkequal(12, 'rrarrrrrrrrra', 'find', 'a', 4, None)
 175         self.checkequal( 2, 'rrarrrrrrrrra', 'find', 'a', None, 6)
 176
 177         self.checkraises(TypeError, 'hello', 'find')
 178         self.checkraises(TypeError, 'hello', 'find', 42)
 179
 180         self.checkequal(0, '', 'find', '')
 181         self.checkequal(-1, '', 'find', '', 1, 1)
 182         self.checkequal(-1, '', 'find', '', sys.maxint, 0)
 183
 184         self.checkequal(-1, '', 'find', 'xx')
 185         self.checkequal(-1, '', 'find', 'xx', 1, 1)
 186         self.checkequal(-1, '', 'find', 'xx', sys.maxint, 0)
 187
 188         # issue 7458
 189         self.checkequal(-1, 'ab', 'find', 'xxx', sys.maxsize + 1, 0)
 190
 191         # For a variety of combinations,
 192         #    verify that str.find() matches __contains__
 193         #    and that the found substring is really at that location
 194         charset = ['', 'a', 'b', 'c']
 195         digits = 5
 196         base = len(charset)
 197         teststrings = set()
 198         for i in xrange(base ** digits):
 199             entry = []
 200             for j in xrange(digits):
 201                 i, m = divmod(i, base)
 202                 entry.append(charset[m])
 203             teststrings.add(''.join(entry))
 204         teststrings = list(teststrings)
 205         for i in teststrings:
 206             i = self.fixtype(i)
 207             for j in teststrings:
 208                 loc = i.find(j)
 209                 r1 = (loc != -1)
 210                 r2 = j in i
 211                 self.assertEqual(r1, r2)
 212                 if loc != -1:
 213                     self.assertEqual(i[loc:loc+len(j)], j)
 214
 215     def test_rfind(self):
 216         self.checkequal(9,  'abcdefghiabc', 'rfind', 'abc')
 217         self.checkequal(12, 'abcdefghiabc', 'rfind', '')
 218         self.checkequal(0, 'abcdefghiabc', 'rfind', 'abcd')
 219         self.checkequal(-1, 'abcdefghiabc', 'rfind', 'abcz')
 220
 221         self.checkequal(3, 'abc', 'rfind', '', 0)
 222         self.checkequal(3, 'abc', 'rfind', '', 3)
 223         self.checkequal(-1, 'abc', 'rfind', '', 4)
 224
 225         # to check the ability to pass None as defaults
 226         self.checkequal(12, 'rrarrrrrrrrra', 'rfind', 'a')
 227         self.checkequal(12, 'rrarrrrrrrrra', 'rfind', 'a', 4)
 228         self.checkequal(-1, 'rrarrrrrrrrra', 'rfind', 'a', 4, 6)
 229         self.checkequal(12, 'rrarrrrrrrrra', 'rfind', 'a', 4, None)
 230         self.checkequal( 2, 'rrarrrrrrrrra', 'rfind', 'a', None, 6)
 231
 232         self.checkraises(TypeError, 'hello', 'rfind')
 233         self.checkraises(TypeError, 'hello', 'rfind', 42)
 234
 235         # For a variety of combinations,
 236         #    verify that str.rfind() matches __contains__
 237         #    and that the found substring is really at that location
 238         charset = ['', 'a', 'b', 'c']
 239         digits = 5
 240         base = len(charset)
 241         teststrings = set()
 242         for i in xrange(base ** digits):
 243             entry = []
 244             for j in xrange(digits):
 245                 i, m = divmod(i, base)
 246                 entry.append(charset[m])
 247             teststrings.add(''.join(entry))
 248         teststrings = list(teststrings)
 249         for i in teststrings:
 250             i = self.fixtype(i)
 251             for j in teststrings:
 252                 loc = i.rfind(j)
 253                 r1 = (loc != -1)
 254                 r2 = j in i
 255                 self.assertEqual(r1, r2)
 256                 if loc != -1:
 257                     self.assertEqual(i[loc:loc+len(j)], self.fixtype(j))
 258
 259         # issue 7458
 260         self.checkequal(-1, 'ab', 'rfind', 'xxx', sys.maxsize + 1, 0)
 261
 262     def test_index(self):
 263         self.checkequal(0, 'abcdefghiabc', 'index', '')
 264         self.checkequal(3, 'abcdefghiabc', 'index', 'def')
 265         self.checkequal(0, 'abcdefghiabc', 'index', 'abc')
 266         self.checkequal(9, 'abcdefghiabc', 'index', 'abc', 1)
 267
 268         self.checkraises(ValueError, 'abcdefghiabc', 'index', 'hib')
 269         self.checkraises(ValueError, 'abcdefghiab', 'index', 'abc', 1)
 270         self.checkraises(ValueError, 'abcdefghi', 'index', 'ghi', 8)
 271         self.checkraises(ValueError, 'abcdefghi', 'index', 'ghi', -1)
 272
 273         # to check the ability to pass None as defaults
 274         self.checkequal( 2, 'rrarrrrrrrrra', 'index', 'a')
 275         self.checkequal(12, 'rrarrrrrrrrra', 'index', 'a', 4)
 276         self.checkraises(ValueError, 'rrarrrrrrrrra', 'index', 'a', 4, 6)
 277         self.checkequal(12, 'rrarrrrrrrrra', 'index', 'a', 4, None)
 278         self.checkequal( 2, 'rrarrrrrrrrra', 'index', 'a', None, 6)
 279
 280         self.checkraises(TypeError, 'hello', 'index')
 281         self.checkraises(TypeError, 'hello', 'index', 42)
 282
 283     def test_rindex(self):
 284         self.checkequal(12, 'abcdefghiabc', 'rindex', '')
 285         self.checkequal(3,  'abcdefghiabc', 'rindex', 'def')
 286         self.checkequal(9,  'abcdefghiabc', 'rindex', 'abc')
 287         self.checkequal(0,  'abcdefghiabc', 'rindex', 'abc', 0, -1)
 288
 289         self.checkraises(ValueError, 'abcdefghiabc', 'rindex', 'hib')
 290         self.checkraises(ValueError, 'defghiabc', 'rindex', 'def', 1)
 291         self.checkraises(ValueError, 'defghiabc', 'rindex', 'abc', 0, -1)
 292         self.checkraises(ValueError, 'abcdefghi', 'rindex', 'ghi', 0, 8)
 293         self.checkraises(ValueError, 'abcdefghi', 'rindex', 'ghi', 0, -1)
 294
 295         # to check the ability to pass None as defaults
 296         self.checkequal(12, 'rrarrrrrrrrra', 'rindex', 'a')
 297         self.checkequal(12, 'rrarrrrrrrrra', 'rindex', 'a', 4)
 298         self.checkraises(ValueError, 'rrarrrrrrrrra', 'rindex', 'a', 4, 6)
 299         self.checkequal(12, 'rrarrrrrrrrra', 'rindex', 'a', 4, None)
 300         self.checkequal( 2, 'rrarrrrrrrrra', 'rindex', 'a', None, 6)
 301
 302         self.checkraises(TypeError, 'hello', 'rindex')
 303         self.checkraises(TypeError, 'hello', 'rindex', 42)
 304
 305     def test_lower(self):
 306         self.checkequal('hello', 'HeLLo', 'lower')
 307         self.checkequal('hello', 'hello', 'lower')
 308         self.checkraises(TypeError, 'hello', 'lower', 42)
 309
 310     def test_upper(self):
 311         self.checkequal('HELLO', 'HeLLo', 'upper')
 312         self.checkequal('HELLO', 'HELLO', 'upper')
 313         self.checkraises(TypeError, 'hello', 'upper', 42)
 314
 315     def test_expandtabs(self):
 316         self.checkequal('abc\rab      def\ng       hi', 'abc\rab\tdef\ng\thi', 'expandtabs')
 317         self.checkequal('abc\rab      def\ng       hi', 'abc\rab\tdef\ng\thi', 'expandtabs', 8)
 318         self.checkequal('abc\rab  def\ng   hi', 'abc\rab\tdef\ng\thi', 'expandtabs', 4)
 319         self.checkequal('abc\r\nab  def\ng   hi', 'abc\r\nab\tdef\ng\thi', 'expandtabs', 4)
 320         self.checkequal('abc\rab      def\ng       hi', 'abc\rab\tdef\ng\thi', 'expandtabs')
 321         self.checkequal('abc\rab      def\ng       hi', 'abc\rab\tdef\ng\thi', 'expandtabs', 8)
 322         self.checkequal('abc\r\nab\r\ndef\ng\r\nhi', 'abc\r\nab\r\ndef\ng\r\nhi', 'expandtabs', 4)
 323         self.checkequal('  a\n b', ' \ta\n\tb', 'expandtabs', 1)
 324
 325         self.checkraises(TypeError, 'hello', 'expandtabs', 42, 42)
 326         # This test is only valid when sizeof(int) == sizeof(void*) == 4.
 327         if sys.maxint < (1 << 32) and struct.calcsize('P') == 4:
 328             self.checkraises(OverflowError,
 329                              '\ta\n\tb', 'expandtabs', sys.maxint)
 330
 331     def test_split(self):
 332         self.checkequal(['this', 'is', 'the', 'split', 'function'],
 333             'this is the split function', 'split')
 334
 335         # by whitespace
 336         self.checkequal(['a', 'b', 'c', 'd'], 'a b c d ', 'split')
 337         self.checkequal(['a', 'b c d'], 'a b c d', 'split', None, 1)
 338         self.checkequal(['a', 'b', 'c d'], 'a b c d', 'split', None, 2)
 339         self.checkequal(['a', 'b', 'c', 'd'], 'a b c d', 'split', None, 3)
 340         self.checkequal(['a', 'b', 'c', 'd'], 'a b c d', 'split', None, 4)
 341         self.checkequal(['a', 'b', 'c', 'd'], 'a b c d', 'split', None,
 342                         sys.maxint-1)
 343         self.checkequal(['a b c d'], 'a b c d', 'split', None, 0)
 344         self.checkequal(['a b c d'], '  a b c d', 'split', None, 0)
 345         self.checkequal(['a', 'b', 'c  d'], 'a  b  c  d', 'split', None, 2)
 346
 347         self.checkequal([], '         ', 'split')
 348         self.checkequal(['a'], '  a    ', 'split')
 349         self.checkequal(['a', 'b'], '  a    b   ', 'split')
 350         self.checkequal(['a', 'b   '], '  a    b   ', 'split', None, 1)
 351         self.checkequal(['a', 'b   c   '], '  a    b   c   ', 'split', None, 1)
 352         self.checkequal(['a', 'b', 'c   '], '  a    b   c   ', 'split', None, 2)
 353         self.checkequal(['a', 'b'], '\n\ta \t\r b \v ', 'split')
 354         aaa = ' a '*20
 355         self.checkequal(['a']*20, aaa, 'split')
 356         self.checkequal(['a'] + [aaa[4:]], aaa, 'split', None, 1)
 357         self.checkequal(['a']*19 + ['a '], aaa, 'split', None, 19)
 358
 359         # by a char
 360         self.checkequal(['a', 'b', 'c', 'd'], 'a|b|c|d', 'split', '|')
 361         self.checkequal(['a|b|c|d'], 'a|b|c|d', 'split', '|', 0)
 362         self.checkequal(['a', 'b|c|d'], 'a|b|c|d', 'split', '|', 1)
 363         self.checkequal(['a', 'b', 'c|d'], 'a|b|c|d', 'split', '|', 2)
 364         self.checkequal(['a', 'b', 'c', 'd'], 'a|b|c|d', 'split', '|', 3)
 365         self.checkequal(['a', 'b', 'c', 'd'], 'a|b|c|d', 'split', '|', 4)
 366         self.checkequal(['a', 'b', 'c', 'd'], 'a|b|c|d', 'split', '|',
 367                         sys.maxint-2)
 368         self.checkequal(['a|b|c|d'], 'a|b|c|d', 'split', '|', 0)
 369         self.checkequal(['a', '', 'b||c||d'], 'a||b||c||d', 'split', '|', 2)
 370         self.checkequal(['endcase ', ''], 'endcase |', 'split', '|')
 371         self.checkequal(['', ' startcase'], '| startcase', 'split', '|')
 372         self.checkequal(['', 'bothcase', ''], '|bothcase|', 'split', '|')
 373         self.checkequal(['a', '', 'b\x00c\x00d'], 'a\x00\x00b\x00c\x00d', 'split', '\x00', 2)
 374
 375         self.checkequal(['a']*20, ('a|'*20)[:-1], 'split', '|')
 376         self.checkequal(['a']*15 +['a|a|a|a|a'],
 377                                    ('a|'*20)[:-1], 'split', '|', 15)
 378
 379         # by string
 380         self.checkequal(['a', 'b', 'c', 'd'], 'a//b//c//d', 'split', '//')
 381         self.checkequal(['a', 'b//c//d'], 'a//b//c//d', 'split', '//', 1)
 382         self.checkequal(['a', 'b', 'c//d'], 'a//b//c//d', 'split', '//', 2)
 383         self.checkequal(['a', 'b', 'c', 'd'], 'a//b//c//d', 'split', '//', 3)
 384         self.checkequal(['a', 'b', 'c', 'd'], 'a//b//c//d', 'split', '//', 4)
 385         self.checkequal(['a', 'b', 'c', 'd'], 'a//b//c//d', 'split', '//',
 386                         sys.maxint-10)
 387         self.checkequal(['a//b//c//d'], 'a//b//c//d', 'split', '//', 0)
 388         self.checkequal(['a', '', 'b////c////d'], 'a////b////c////d', 'split', '//', 2)
 389         self.checkequal(['endcase ', ''], 'endcase test', 'split', 'test')
 390         self.checkequal(['', ' begincase'], 'test begincase', 'split', 'test')
 391         self.checkequal(['', ' bothcase ', ''], 'test bothcase test',
 392                         'split', 'test')
 393         self.checkequal(['a', 'bc'], 'abbbc', 'split', 'bb')
 394         self.checkequal(['', ''], 'aaa', 'split', 'aaa')
 395         self.checkequal(['aaa'], 'aaa', 'split', 'aaa', 0)
 396         self.checkequal(['ab', 'ab'], 'abbaab', 'split', 'ba')
 397         self.checkequal(['aaaa'], 'aaaa', 'split', 'aab')
 398         self.checkequal([''], '', 'split', 'aaa')
 399         self.checkequal(['aa'], 'aa', 'split', 'aaa')
 400         self.checkequal(['A', 'bobb'], 'Abbobbbobb', 'split', 'bbobb')
 401         self.checkequal(['A', 'B', ''], 'AbbobbBbbobb', 'split', 'bbobb')
 402
 403         self.checkequal(['a']*20, ('aBLAH'*20)[:-4], 'split', 'BLAH')
 404         self.checkequal(['a']*20, ('aBLAH'*20)[:-4], 'split', 'BLAH', 19)
 405         self.checkequal(['a']*18 + ['aBLAHa'], ('aBLAH'*20)[:-4],
 406                         'split', 'BLAH', 18)
 407
 408         # mixed use of str and unicode
 409         self.checkequal([u'a', u'b', u'c d'], 'a b c d', 'split', u' ', 2)
 410
 411         # argument type
 412         self.checkraises(TypeError, 'hello', 'split', 42, 42, 42)
 413
 414         # null case
 415         self.checkraises(ValueError, 'hello', 'split', '')
 416         self.checkraises(ValueError, 'hello', 'split', '', 0)
 417
 418     def test_rsplit(self):
 419         self.checkequal(['this', 'is', 'the', 'rsplit', 'function'],
 420                          'this is the rsplit function', 'rsplit')
 421
 422         # by whitespace
 423         self.checkequal(['a', 'b', 'c', 'd'], 'a b c d ', 'rsplit')
 424         self.checkequal(['a b c', 'd'], 'a b c d', 'rsplit', None, 1)
 425         self.checkequal(['a b', 'c', 'd'], 'a b c d', 'rsplit', None, 2)
 426         self.checkequal(['a', 'b', 'c', 'd'], 'a b c d', 'rsplit', None, 3)
 427         self.checkequal(['a', 'b', 'c', 'd'], 'a b c d', 'rsplit', None, 4)
 428         self.checkequal(['a', 'b', 'c', 'd'], 'a b c d', 'rsplit', None,
 429                         sys.maxint-20)
 430         self.checkequal(['a b c d'], 'a b c d', 'rsplit', None, 0)
 431         self.checkequal(['a b c d'], 'a b c d  ', 'rsplit', None, 0)
 432         self.checkequal(['a  b', 'c', 'd'], 'a  b  c  d', 'rsplit', None, 2)
 433
 434         self.checkequal([], '         ', 'rsplit')
 435         self.checkequal(['a'], '  a    ', 'rsplit')
 436         self.checkequal(['a', 'b'], '  a    b   ', 'rsplit')
 437         self.checkequal(['  a', 'b'], '  a    b   ', 'rsplit', None, 1)
 438         self.checkequal(['  a    b','c'], '  a    b   c   ', 'rsplit',
 439                         None, 1)
 440         self.checkequal(['  a', 'b', 'c'], '  a    b   c   ', 'rsplit',
 441                         None, 2)
 442         self.checkequal(['a', 'b'], '\n\ta \t\r b \v ', 'rsplit', None, 88)
 443         aaa = ' a '*20
 444         self.checkequal(['a']*20, aaa, 'rsplit')
 445         self.checkequal([aaa[:-4]] + ['a'], aaa, 'rsplit', None, 1)
 446         self.checkequal([' a  a'] + ['a']*18, aaa, 'rsplit', None, 18)
 447
 448
 449         # by a char
 450         self.checkequal(['a', 'b', 'c', 'd'], 'a|b|c|d', 'rsplit', '|')
 451         self.checkequal(['a|b|c', 'd'], 'a|b|c|d', 'rsplit', '|', 1)
 452         self.checkequal(['a|b', 'c', 'd'], 'a|b|c|d', 'rsplit', '|', 2)
 453         self.checkequal(['a', 'b', 'c', 'd'], 'a|b|c|d', 'rsplit', '|', 3)
 454         self.checkequal(['a', 'b', 'c', 'd'], 'a|b|c|d', 'rsplit', '|', 4)
 455         self.checkequal(['a', 'b', 'c', 'd'], 'a|b|c|d', 'rsplit', '|',
 456                         sys.maxint-100)
 457         self.checkequal(['a|b|c|d'], 'a|b|c|d', 'rsplit', '|', 0)
 458         self.checkequal(['a||b||c', '', 'd'], 'a||b||c||d', 'rsplit', '|', 2)
 459         self.checkequal(['', ' begincase'], '| begincase', 'rsplit', '|')
 460         self.checkequal(['endcase ', ''], 'endcase |', 'rsplit', '|')
 461         self.checkequal(['', 'bothcase', ''], '|bothcase|', 'rsplit', '|')
 462
 463         self.checkequal(['a\x00\x00b', 'c', 'd'], 'a\x00\x00b\x00c\x00d', 'rsplit', '\x00', 2)
 464
 465         self.checkequal(['a']*20, ('a|'*20)[:-1], 'rsplit', '|')
 466         self.checkequal(['a|a|a|a|a']+['a']*15,
 467                         ('a|'*20)[:-1], 'rsplit', '|', 15)
 468
 469         # by string
 470         self.checkequal(['a', 'b', 'c', 'd'], 'a//b//c//d', 'rsplit', '//')
 471         self.checkequal(['a//b//c', 'd'], 'a//b//c//d', 'rsplit', '//', 1)
 472         self.checkequal(['a//b', 'c', 'd'], 'a//b//c//d', 'rsplit', '//', 2)
 473         self.checkequal(['a', 'b', 'c', 'd'], 'a//b//c//d', 'rsplit', '//', 3)
 474         self.checkequal(['a', 'b', 'c', 'd'], 'a//b//c//d', 'rsplit', '//', 4)
 475         self.checkequal(['a', 'b', 'c', 'd'], 'a//b//c//d', 'rsplit', '//',
 476                         sys.maxint-5)
 477         self.checkequal(['a//b//c//d'], 'a//b//c//d', 'rsplit', '//', 0)
 478         self.checkequal(['a////b////c', '', 'd'], 'a////b////c////d', 'rsplit', '//', 2)
 479         self.checkequal(['', ' begincase'], 'test begincase', 'rsplit', 'test')
 480         self.checkequal(['endcase ', ''], 'endcase test', 'rsplit', 'test')
 481         self.checkequal(['', ' bothcase ', ''], 'test bothcase test',
 482                         'rsplit', 'test')
 483         self.checkequal(['ab', 'c'], 'abbbc', 'rsplit', 'bb')
 484         self.checkequal(['', ''], 'aaa', 'rsplit', 'aaa')
 485         self.checkequal(['aaa'], 'aaa', 'rsplit', 'aaa', 0)
 486         self.checkequal(['ab', 'ab'], 'abbaab', 'rsplit', 'ba')
 487         self.checkequal(['aaaa'], 'aaaa', 'rsplit', 'aab')
 488         self.checkequal([''], '', 'rsplit', 'aaa')
 489         self.checkequal(['aa'], 'aa', 'rsplit', 'aaa')
 490         self.checkequal(['bbob', 'A'], 'bbobbbobbA', 'rsplit', 'bbobb')
 491         self.checkequal(['', 'B', 'A'], 'bbobbBbbobbA', 'rsplit', 'bbobb')
 492
 493         self.checkequal(['a']*20, ('aBLAH'*20)[:-4], 'rsplit', 'BLAH')
 494         self.checkequal(['a']*20, ('aBLAH'*20)[:-4], 'rsplit', 'BLAH', 19)
 495         self.checkequal(['aBLAHa'] + ['a']*18, ('aBLAH'*20)[:-4],
 496                         'rsplit', 'BLAH', 18)
 497
 498         # mixed use of str and unicode
 499         self.checkequal([u'a b', u'c', u'd'], 'a b c d', 'rsplit', u' ', 2)
 500
 501         # argument type
 502         self.checkraises(TypeError, 'hello', 'rsplit', 42, 42, 42)
 503
 504         # null case
 505         self.checkraises(ValueError, 'hello', 'rsplit', '')
 506         self.checkraises(ValueError, 'hello', 'rsplit', '', 0)
 507
 508     def test_strip(self):
 509         self.checkequal('hello', '   hello   ', 'strip')
 510         self.checkequal('hello   ', '   hello   ', 'lstrip')
 511         self.checkequal('   hello', '   hello   ', 'rstrip')
 512         self.checkequal('hello', 'hello', 'strip')
 513
 514         # strip/lstrip/rstrip with None arg
 515         self.checkequal('hello', '   hello   ', 'strip', None)
 516         self.checkequal('hello   ', '   hello   ', 'lstrip', None)
 517         self.checkequal('   hello', '   hello   ', 'rstrip', None)
 518         self.checkequal('hello', 'hello', 'strip', None)
 519
 520         # strip/lstrip/rstrip with str arg
 521         self.checkequal('hello', 'xyzzyhelloxyzzy', 'strip', 'xyz')
 522         self.checkequal('helloxyzzy', 'xyzzyhelloxyzzy', 'lstrip', 'xyz')
 523         self.checkequal('xyzzyhello', 'xyzzyhelloxyzzy', 'rstrip', 'xyz')
 524         self.checkequal('hello', 'hello', 'strip', 'xyz')
 525
 526         # strip/lstrip/rstrip with unicode arg
 527         if test_support.have_unicode:
 528             self.checkequal(unicode('hello', 'ascii'), 'xyzzyhelloxyzzy',
 529                  'strip', unicode('xyz', 'ascii'))
 530             self.checkequal(unicode('helloxyzzy', 'ascii'), 'xyzzyhelloxyzzy',
 531                  'lstrip', unicode('xyz', 'ascii'))
 532             self.checkequal(unicode('xyzzyhello', 'ascii'), 'xyzzyhelloxyzzy',
 533                  'rstrip', unicode('xyz', 'ascii'))
 534             # XXX
 535             #self.checkequal(unicode('hello', 'ascii'), 'hello',
 536             #     'strip', unicode('xyz', 'ascii'))
 537
 538         self.checkraises(TypeError, 'hello', 'strip', 42, 42)
 539         self.checkraises(TypeError, 'hello', 'lstrip', 42, 42)
 540         self.checkraises(TypeError, 'hello', 'rstrip', 42, 42)
 541
 542     def test_ljust(self):
 543         self.checkequal('abc       ', 'abc', 'ljust', 10)
 544         self.checkequal('abc   ', 'abc', 'ljust', 6)
 545         self.checkequal('abc', 'abc', 'ljust', 3)
 546         self.checkequal('abc', 'abc', 'ljust', 2)
 547         self.checkequal('abc*******', 'abc', 'ljust', 10, '*')
 548         self.checkraises(TypeError, 'abc', 'ljust')
 549
 550     def test_rjust(self):
 551         self.checkequal('       abc', 'abc', 'rjust', 10)
 552         self.checkequal('   abc', 'abc', 'rjust', 6)
 553         self.checkequal('abc', 'abc', 'rjust', 3)
 554         self.checkequal('abc', 'abc', 'rjust', 2)
 555         self.checkequal('*******abc', 'abc', 'rjust', 10, '*')
 556         self.checkraises(TypeError, 'abc', 'rjust')
 557
 558     def test_center(self):
 559         self.checkequal('   abc    ', 'abc', 'center', 10)
 560         self.checkequal(' abc  ', 'abc', 'center', 6)
 561         self.checkequal('abc', 'abc', 'center', 3)
 562         self.checkequal('abc', 'abc', 'center', 2)
 563         self.checkequal('***abc****', 'abc', 'center', 10, '*')
 564         self.checkraises(TypeError, 'abc', 'center')
 565
 566     def test_swapcase(self):
 567         self.checkequal('hEllO CoMPuTErS', 'HeLLo cOmpUteRs', 'swapcase')
 568
 569         self.checkraises(TypeError, 'hello', 'swapcase', 42)
 570
 571     def test_replace(self):
 572         EQ = self.checkequal
 573
 574         # Operations on the empty string
 575         EQ("", "", "replace", "", "")
 576         EQ("A", "", "replace", "", "A")
 577         EQ("", "", "replace", "A", "")
 578         EQ("", "", "replace", "A", "A")
 579         EQ("", "", "replace", "", "", 100)
 580         EQ("", "", "replace", "", "", sys.maxint)
 581
 582         # interleave (from=="", 'to' gets inserted everywhere)
 583         EQ("A", "A", "replace", "", "")
 584         EQ("*A*", "A", "replace", "", "*")
 585         EQ("*1A*1", "A", "replace", "", "*1")
 586         EQ("*-#A*-#", "A", "replace", "", "*-#")
 587         EQ("*-A*-A*-", "AA", "replace", "", "*-")
 588         EQ("*-A*-A*-", "AA", "replace", "", "*-", -1)
 589         EQ("*-A*-A*-", "AA", "replace", "", "*-", sys.maxint)
 590         EQ("*-A*-A*-", "AA", "replace", "", "*-", 4)
 591         EQ("*-A*-A*-", "AA", "replace", "", "*-", 3)
 592         EQ("*-A*-A", "AA", "replace", "", "*-", 2)
 593         EQ("*-AA", "AA", "replace", "", "*-", 1)
 594         EQ("AA", "AA", "replace", "", "*-", 0)
 595
 596         # single character deletion (from=="A", to=="")
 597         EQ("", "A", "replace", "A", "")
 598         EQ("", "AAA", "replace", "A", "")
 599         EQ("", "AAA", "replace", "A", "", -1)
 600         EQ("", "AAA", "replace", "A", "", sys.maxint)
 601         EQ("", "AAA", "replace", "A", "", 4)
 602         EQ("", "AAA", "replace", "A", "", 3)
 603         EQ("A", "AAA", "replace", "A", "", 2)
 604         EQ("AA", "AAA", "replace", "A", "", 1)
 605         EQ("AAA", "AAA", "replace", "A", "", 0)
 606         EQ("", "AAAAAAAAAA", "replace", "A", "")
 607         EQ("BCD", "ABACADA", "replace", "A", "")
 608         EQ("BCD", "ABACADA", "replace", "A", "", -1)
 609         EQ("BCD", "ABACADA", "replace", "A", "", sys.maxint)
 610         EQ("BCD", "ABACADA", "replace", "A", "", 5)
 611         EQ("BCD", "ABACADA", "replace", "A", "", 4)
 612         EQ("BCDA", "ABACADA", "replace", "A", "", 3)
 613         EQ("BCADA", "ABACADA", "replace", "A", "", 2)
 614         EQ("BACADA", "ABACADA", "replace", "A", "", 1)
 615         EQ("ABACADA", "ABACADA", "replace", "A", "", 0)
 616         EQ("BCD", "ABCAD", "replace", "A", "")
 617         EQ("BCD", "ABCADAA", "replace", "A", "")
 618         EQ("BCD", "BCD", "replace", "A", "")
 619         EQ("*************", "*************", "replace", "A", "")
 620         EQ("^A^", "^"+"A"*1000+"^", "replace", "A", "", 999)
 621
 622         # substring deletion (from=="the", to=="")
 623         EQ("", "the", "replace", "the", "")
 624         EQ("ater", "theater", "replace", "the", "")
 625         EQ("", "thethe", "replace", "the", "")
 626         EQ("", "thethethethe", "replace", "the", "")
 627         EQ("aaaa", "theatheatheathea", "replace", "the", "")
 628         EQ("that", "that", "replace", "the", "")
 629         EQ("thaet", "thaet", "replace", "the", "")
 630         EQ("here and re", "here and there", "replace", "the", "")
 631         EQ("here and re and re", "here and there and there",
 632            "replace", "the", "", sys.maxint)
 633         EQ("here and re and re", "here and there and there",
 634            "replace", "the", "", -1)
 635         EQ("here and re and re", "here and there and there",
 636            "replace", "the", "", 3)
 637         EQ("here and re and re", "here and there and there",
 638            "replace", "the", "", 2)
 639         EQ("here and re and there", "here and there and there",
 640            "replace", "the", "", 1)
 641         EQ("here and there and there", "here and there and there",
 642            "replace", "the", "", 0)
 643         EQ("here and re and re", "here and there and there", "replace", "the", "")
 644
 645         EQ("abc", "abc", "replace", "the", "")
 646         EQ("abcdefg", "abcdefg", "replace", "the", "")
 647
 648         # substring deletion (from=="bob", to=="")
 649         EQ("bob", "bbobob", "replace", "bob", "")
 650         EQ("bobXbob", "bbobobXbbobob", "replace", "bob", "")
 651         EQ("aaaaaaa", "aaaaaaabob", "replace", "bob", "")
 652         EQ("aaaaaaa", "aaaaaaa", "replace", "bob", "")
 653
 654         # single character replace in place (len(from)==len(to)==1)
 655         EQ("Who goes there?", "Who goes there?", "replace", "o", "o")
 656         EQ("WhO gOes there?", "Who goes there?", "replace", "o", "O")
 657         EQ("WhO gOes there?", "Who goes there?", "replace", "o", "O", sys.maxint)
 658         EQ("WhO gOes there?", "Who goes there?", "replace", "o", "O", -1)
 659         EQ("WhO gOes there?", "Who goes there?", "replace", "o", "O", 3)
 660         EQ("WhO gOes there?", "Who goes there?", "replace", "o", "O", 2)
 661         EQ("WhO goes there?", "Who goes there?", "replace", "o", "O", 1)
 662         EQ("Who goes there?", "Who goes there?", "replace", "o", "O", 0)
 663
 664         EQ("Who goes there?", "Who goes there?", "replace", "a", "q")
 665         EQ("who goes there?", "Who goes there?", "replace", "W", "w")
 666         EQ("wwho goes there?ww", "WWho goes there?WW", "replace", "W", "w")
 667         EQ("Who goes there!", "Who goes there?", "replace", "?", "!")
 668         EQ("Who goes there!!", "Who goes there??", "replace", "?", "!")
 669
 670         EQ("Who goes there?", "Who goes there?", "replace", ".", "!")
 671
 672         # substring replace in place (len(from)==len(to) > 1)
 673         EQ("Th** ** a t**sue", "This is a tissue", "replace", "is", "**")
 674         EQ("Th** ** a t**sue", "This is a tissue", "replace", "is", "**", sys.maxint)
 675         EQ("Th** ** a t**sue", "This is a tissue", "replace", "is", "**", -1)
 676         EQ("Th** ** a t**sue", "This is a tissue", "replace", "is", "**", 4)
 677         EQ("Th** ** a t**sue", "This is a tissue", "replace", "is", "**", 3)
 678         EQ("Th** ** a tissue", "This is a tissue", "replace", "is", "**", 2)
 679         EQ("Th** is a tissue", "This is a tissue", "replace", "is", "**", 1)
 680         EQ("This is a tissue", "This is a tissue", "replace", "is", "**", 0)
 681         EQ("cobob", "bobob", "replace", "bob", "cob")
 682         EQ("cobobXcobocob", "bobobXbobobob", "replace", "bob", "cob")
 683         EQ("bobob", "bobob", "replace", "bot", "bot")
 684
 685         # replace single character (len(from)==1, len(to)>1)
 686         EQ("ReyKKjaviKK", "Reykjavik", "replace", "k", "KK")
 687         EQ("ReyKKjaviKK", "Reykjavik", "replace", "k", "KK", -1)
 688         EQ("ReyKKjaviKK", "Reykjavik", "replace", "k", "KK", sys.maxint)
 689         EQ("ReyKKjaviKK", "Reykjavik", "replace", "k", "KK", 2)
 690         EQ("ReyKKjavik", "Reykjavik", "replace", "k", "KK", 1)
 691         EQ("Reykjavik", "Reykjavik", "replace", "k", "KK", 0)
 692         EQ("A----B----C----", "A.B.C.", "replace", ".", "----")
 693
 694         EQ("Reykjavik", "Reykjavik", "replace", "q", "KK")
 695
 696         # replace substring (len(from)>1, len(to)!=len(from))
 697         EQ("ham, ham, eggs and ham", "spam, spam, eggs and spam",
 698            "replace", "spam", "ham")
 699         EQ("ham, ham, eggs and ham", "spam, spam, eggs and spam",
 700            "replace", "spam", "ham", sys.maxint)
 701         EQ("ham, ham, eggs and ham", "spam, spam, eggs and spam",
 702            "replace", "spam", "ham", -1)
 703         EQ("ham, ham, eggs and ham", "spam, spam, eggs and spam",
 704            "replace", "spam", "ham", 4)
 705         EQ("ham, ham, eggs and ham", "spam, spam, eggs and spam",
 706            "replace", "spam", "ham", 3)
 707         EQ("ham, ham, eggs and spam", "spam, spam, eggs and spam",
 708            "replace", "spam", "ham", 2)
 709         EQ("ham, spam, eggs and spam", "spam, spam, eggs and spam",
 710            "replace", "spam", "ham", 1)
 711         EQ("spam, spam, eggs and spam", "spam, spam, eggs and spam",
 712            "replace", "spam", "ham", 0)
 713
 714         EQ("bobob", "bobobob", "replace", "bobob", "bob")
 715         EQ("bobobXbobob", "bobobobXbobobob", "replace", "bobob", "bob")
 716         EQ("BOBOBOB", "BOBOBOB", "replace", "bob", "bobby")
 717
 718         with test_support.check_py3k_warnings():
 719             ba = buffer('a')
 720             bb = buffer('b')
 721         EQ("bbc", "abc", "replace", ba, bb)
 722         EQ("aac", "abc", "replace", bb, ba)
 723
 724         #
 725         self.checkequal('one@two!three!', 'one!two!three!', 'replace', '!', '@', 1)
 726         self.checkequal('onetwothree', 'one!two!three!', 'replace', '!', '')
 727         self.checkequal('one@two@three!', 'one!two!three!', 'replace', '!', '@', 2)
 728         self.checkequal('one@two@three@', 'one!two!three!', 'replace', '!', '@', 3)
 729         self.checkequal('one@two@three@', 'one!two!three!', 'replace', '!', '@', 4)
 730         self.checkequal('one!two!three!', 'one!two!three!', 'replace', '!', '@', 0)
 731         self.checkequal('one@two@three@', 'one!two!three!', 'replace', '!', '@')
 732         self.checkequal('one!two!three!', 'one!two!three!', 'replace', 'x', '@')
 733         self.checkequal('one!two!three!', 'one!two!three!', 'replace', 'x', '@', 2)
 734         self.checkequal('-a-b-c-', 'abc', 'replace', '', '-')
 735         self.checkequal('-a-b-c', 'abc', 'replace', '', '-', 3)
 736         self.checkequal('abc', 'abc', 'replace', '', '-', 0)
 737         self.checkequal('', '', 'replace', '', '')
 738         self.checkequal('abc', 'abc', 'replace', 'ab', '--', 0)
 739         self.checkequal('abc', 'abc', 'replace', 'xy', '--')
 740         # Next three for SF bug 422088: [OSF1 alpha] string.replace(); died with
 741         # MemoryError due to empty result (platform malloc issue when requesting
 742         # 0 bytes).
 743         self.checkequal('', '123', 'replace', '123', '')
 744         self.checkequal('', '123123', 'replace', '123', '')
 745         self.checkequal('x', '123x123', 'replace', '123', '')
 746
 747         self.checkraises(TypeError, 'hello', 'replace')
 748         self.checkraises(TypeError, 'hello', 'replace', 42)
 749         self.checkraises(TypeError, 'hello', 'replace', 42, 'h')
 750         self.checkraises(TypeError, 'hello', 'replace', 'h', 42)
 751
 752     def test_replace_overflow(self):
 753         # Check for overflow checking on 32 bit machines
 754         if sys.maxint != 2147483647 or struct.calcsize("P") > 4:
 755             return
 756         A2_16 = "A" * (2**16)
 757         self.checkraises(OverflowError, A2_16, "replace", "", A2_16)
 758         self.checkraises(OverflowError, A2_16, "replace", "A", A2_16)
 759         self.checkraises(OverflowError, A2_16, "replace", "AA", A2_16+A2_16)
 760
 761     def test_zfill(self):
 762         self.checkequal('123', '123', 'zfill', 2)
 763         self.checkequal('123', '123', 'zfill', 3)
 764         self.checkequal('0123', '123', 'zfill', 4)
 765         self.checkequal('+123', '+123', 'zfill', 3)
 766         self.checkequal('+123', '+123', 'zfill', 4)
 767         self.checkequal('+0123', '+123', 'zfill', 5)
 768         self.checkequal('-123', '-123', 'zfill', 3)
 769         self.checkequal('-123', '-123', 'zfill', 4)
 770         self.checkequal('-0123', '-123', 'zfill', 5)
 771         self.checkequal('000', '', 'zfill', 3)
 772         self.checkequal('34', '34', 'zfill', 1)
 773         self.checkequal('0034', '34', 'zfill', 4)
 774
 775         self.checkraises(TypeError, '123', 'zfill')
 776
 777 # XXX alias for py3k forward compatibility
 778 BaseTest = CommonTest
 779
 780 class MixinStrUnicodeUserStringTest:
 781     # additional tests that only work for
 782     # stringlike objects, i.e. str, unicode, UserString
 783     # (but not the string module)
 784
 785     def test_islower(self):
 786         self.checkequal(False, '', 'islower')
 787         self.checkequal(True, 'a', 'islower')
 788         self.checkequal(False, 'A', 'islower')
 789         self.checkequal(False, '\n', 'islower')
 790         self.checkequal(True, 'abc', 'islower')
 791         self.checkequal(False, 'aBc', 'islower')
 792         self.checkequal(True, 'abc\n', 'islower')
 793         self.checkraises(TypeError, 'abc', 'islower', 42)
 794
 795     def test_isupper(self):
 796         self.checkequal(False, '', 'isupper')
 797         self.checkequal(False, 'a', 'isupper')
 798         self.checkequal(True, 'A', 'isupper')
 799         self.checkequal(False, '\n', 'isupper')
 800         self.checkequal(True, 'ABC', 'isupper')
 801         self.checkequal(False, 'AbC', 'isupper')
 802         self.checkequal(True, 'ABC\n', 'isupper')
 803         self.checkraises(TypeError, 'abc', 'isupper', 42)
 804
 805     def test_istitle(self):
 806         self.checkequal(False, '', 'istitle')
 807         self.checkequal(False, 'a', 'istitle')
 808         self.checkequal(True, 'A', 'istitle')
 809         self.checkequal(False, '\n', 'istitle')
 810         self.checkequal(True, 'A Titlecased Line', 'istitle')
 811         self.checkequal(True, 'A\nTitlecased Line', 'istitle')
 812         self.checkequal(True, 'A Titlecased, Line', 'istitle')
 813         self.checkequal(False, 'Not a capitalized String', 'istitle')
 814         self.checkequal(False, 'Not\ta Titlecase String', 'istitle')
 815         self.checkequal(False, 'Not--a Titlecase String', 'istitle')
 816         self.checkequal(False, 'NOT', 'istitle')
 817         self.checkraises(TypeError, 'abc', 'istitle', 42)
 818
 819     def test_isspace(self):
 820         self.checkequal(False, '', 'isspace')
 821         self.checkequal(False, 'a', 'isspace')
 822         self.checkequal(True, ' ', 'isspace')
 823         self.checkequal(True, '\t', 'isspace')
 824         self.checkequal(True, '\r', 'isspace')
 825         self.checkequal(True, '\n', 'isspace')
 826         self.checkequal(True, ' \t\r\n', 'isspace')
 827         self.checkequal(False, ' \t\r\na', 'isspace')
 828         self.checkraises(TypeError, 'abc', 'isspace', 42)
 829
 830     def test_isalpha(self):
 831         self.checkequal(False, '', 'isalpha')
 832         self.checkequal(True, 'a', 'isalpha')
 833         self.checkequal(True, 'A', 'isalpha')
 834         self.checkequal(False, '\n', 'isalpha')
 835         self.checkequal(True, 'abc', 'isalpha')
 836         self.checkequal(False, 'aBc123', 'isalpha')
 837         self.checkequal(False, 'abc\n', 'isalpha')
 838         self.checkraises(TypeError, 'abc', 'isalpha', 42)
 839
 840     def test_isalnum(self):
 841         self.checkequal(False, '', 'isalnum')
 842         self.checkequal(True, 'a', 'isalnum')
 843         self.checkequal(True, 'A', 'isalnum')
 844         self.checkequal(False, '\n', 'isalnum')
 845         self.checkequal(True, '123abc456', 'isalnum')
 846         self.checkequal(True, 'a1b3c', 'isalnum')
 847         self.checkequal(False, 'aBc000 ', 'isalnum')
 848         self.checkequal(False, 'abc\n', 'isalnum')
 849         self.checkraises(TypeError, 'abc', 'isalnum', 42)
 850
 851     def test_isdigit(self):
 852         self.checkequal(False, '', 'isdigit')
 853         self.checkequal(False, 'a', 'isdigit')
 854         self.checkequal(True, '0', 'isdigit')
 855         self.checkequal(True, '0123456789', 'isdigit')
 856         self.checkequal(False, '0123456789a', 'isdigit')
 857
 858         self.checkraises(TypeError, 'abc', 'isdigit', 42)
 859
 860     def test_title(self):
 861         self.checkequal(' Hello ', ' hello ', 'title')
 862         self.checkequal('Hello ', 'hello ', 'title')
 863         self.checkequal('Hello ', 'Hello ', 'title')
 864         self.checkequal('Format This As Title String', "fOrMaT thIs aS titLe String", 'title')
 865         self.checkequal('Format,This-As*Title;String', "fOrMaT,thIs-aS*titLe;String", 'title', )
 866         self.checkequal('Getint', "getInt", 'title')
 867         self.checkraises(TypeError, 'hello', 'title', 42)
 868
 869     def test_splitlines(self):
 870         self.checkequal(['abc', 'def', '', 'ghi'], "abc\ndef\n\rghi", 'splitlines')
 871         self.checkequal(['abc', 'def', '', 'ghi'], "abc\ndef\n\r\nghi", 'splitlines')
 872         self.checkequal(['abc', 'def', 'ghi'], "abc\ndef\r\nghi", 'splitlines')
 873         self.checkequal(['abc', 'def', 'ghi'], "abc\ndef\r\nghi\n", 'splitlines')
 874         self.checkequal(['abc', 'def', 'ghi', ''], "abc\ndef\r\nghi\n\r", 'splitlines')
 875         self.checkequal(['', 'abc', 'def', 'ghi', ''], "\nabc\ndef\r\nghi\n\r", 'splitlines')
 876         self.checkequal(['\n', 'abc\n', 'def\r\n', 'ghi\n', '\r'], "\nabc\ndef\r\nghi\n\r", 'splitlines', 1)
 877
 878         self.checkraises(TypeError, 'abc', 'splitlines', 42, 42)
 879
 880     def test_startswith(self):
 881         self.checkequal(True, 'hello', 'startswith', 'he')
 882         self.checkequal(True, 'hello', 'startswith', 'hello')
 883         self.checkequal(False, 'hello', 'startswith', 'hello world')
 884         self.checkequal(True, 'hello', 'startswith', '')
 885         self.checkequal(False, 'hello', 'startswith', 'ello')
 886         self.checkequal(True, 'hello', 'startswith', 'ello', 1)
 887         self.checkequal(True, 'hello', 'startswith', 'o', 4)
 888         self.checkequal(False, 'hello', 'startswith', 'o', 5)
 889         self.checkequal(True, 'hello', 'startswith', '', 5)
 890         self.checkequal(False, 'hello', 'startswith', 'lo', 6)
 891         self.checkequal(True, 'helloworld', 'startswith', 'lowo', 3)
 892         self.checkequal(True, 'helloworld', 'startswith', 'lowo', 3, 7)
 893         self.checkequal(False, 'helloworld', 'startswith', 'lowo', 3, 6)
 894
 895         # test negative indices
 896         self.checkequal(True, 'hello', 'startswith', 'he', 0, -1)
 897         self.checkequal(True, 'hello', 'startswith', 'he', -53, -1)
 898         self.checkequal(False, 'hello', 'startswith', 'hello', 0, -1)
 899         self.checkequal(False, 'hello', 'startswith', 'hello world', -1, -10)
 900         self.checkequal(False, 'hello', 'startswith', 'ello', -5)
 901         self.checkequal(True, 'hello', 'startswith', 'ello', -4)
 902         self.checkequal(False, 'hello', 'startswith', 'o', -2)
 903         self.checkequal(True, 'hello', 'startswith', 'o', -1)
 904         self.checkequal(True, 'hello', 'startswith', '', -3, -3)
 905         self.checkequal(False, 'hello', 'startswith', 'lo', -9)
 906
 907         self.checkraises(TypeError, 'hello', 'startswith')
 908         self.checkraises(TypeError, 'hello', 'startswith', 42)
 909
 910         # test tuple arguments
 911         self.checkequal(True, 'hello', 'startswith', ('he', 'ha'))
 912         self.checkequal(False, 'hello', 'startswith', ('lo', 'llo'))
 913         self.checkequal(True, 'hello', 'startswith', ('hellox', 'hello'))
 914         self.checkequal(False, 'hello', 'startswith', ())
 915         self.checkequal(True, 'helloworld', 'startswith', ('hellowo',
 916                                                            'rld', 'lowo'), 3)
 917         self.checkequal(False, 'helloworld', 'startswith', ('hellowo', 'ello',
 918                                                             'rld'), 3)
 919         self.checkequal(True, 'hello', 'startswith', ('lo', 'he'), 0, -1)
 920         self.checkequal(False, 'hello', 'startswith', ('he', 'hel'), 0, 1)
 921         self.checkequal(True, 'hello', 'startswith', ('he', 'hel'), 0, 2)
 922
 923         self.checkraises(TypeError, 'hello', 'startswith', (42,))
 924
 925     def test_endswith(self):
 926         self.checkequal(True, 'hello', 'endswith', 'lo')
 927         self.checkequal(False, 'hello', 'endswith', 'he')
 928         self.checkequal(True, 'hello', 'endswith', '')
 929         self.checkequal(False, 'hello', 'endswith', 'hello world')
 930         self.checkequal(False, 'helloworld', 'endswith', 'worl')
 931         self.checkequal(True, 'helloworld', 'endswith', 'worl', 3, 9)
 932         self.checkequal(True, 'helloworld', 'endswith', 'world', 3, 12)
 933         self.checkequal(True, 'helloworld', 'endswith', 'lowo', 1, 7)
 934         self.checkequal(True, 'helloworld', 'endswith', 'lowo', 2, 7)
 935         self.checkequal(True, 'helloworld', 'endswith', 'lowo', 3, 7)
 936         self.checkequal(False, 'helloworld', 'endswith', 'lowo', 4, 7)
 937         self.checkequal(False, 'helloworld', 'endswith', 'lowo', 3, 8)
 938         self.checkequal(False, 'ab', 'endswith', 'ab', 0, 1)
 939         self.checkequal(False, 'ab', 'endswith', 'ab', 0, 0)
 940
 941         # test negative indices
 942         self.checkequal(True, 'hello', 'endswith', 'lo', -2)
 943         self.checkequal(False, 'hello', 'endswith', 'he', -2)
 944         self.checkequal(True, 'hello', 'endswith', '', -3, -3)
 945         self.checkequal(False, 'hello', 'endswith', 'hello world', -10, -2)
 946         self.checkequal(False, 'helloworld', 'endswith', 'worl', -6)
 947         self.checkequal(True, 'helloworld', 'endswith', 'worl', -5, -1)
 948         self.checkequal(True, 'helloworld', 'endswith', 'worl', -5, 9)
 949         self.checkequal(True, 'helloworld', 'endswith', 'world', -7, 12)
 950         self.checkequal(True, 'helloworld', 'endswith', 'lowo', -99, -3)
 951         self.checkequal(True, 'helloworld', 'endswith', 'lowo', -8, -3)
 952         self.checkequal(True, 'helloworld', 'endswith', 'lowo', -7, -3)
 953         self.checkequal(False, 'helloworld', 'endswith', 'lowo', 3, -4)
 954         self.checkequal(False, 'helloworld', 'endswith', 'lowo', -8, -2)
 955
 956         self.checkraises(TypeError, 'hello', 'endswith')
 957         self.checkraises(TypeError, 'hello', 'endswith', 42)
 958
 959         # test tuple arguments
 960         self.checkequal(False, 'hello', 'endswith', ('he', 'ha'))
 961         self.checkequal(True, 'hello', 'endswith', ('lo', 'llo'))
 962         self.checkequal(True, 'hello', 'endswith', ('hellox', 'hello'))
 963         self.checkequal(False, 'hello', 'endswith', ())
 964         self.checkequal(True, 'helloworld', 'endswith', ('hellowo',
 965                                                            'rld', 'lowo'), 3)
 966         self.checkequal(False, 'helloworld', 'endswith', ('hellowo', 'ello',
 967                                                             'rld'), 3, -1)
 968         self.checkequal(True, 'hello', 'endswith', ('hell', 'ell'), 0, -1)
 969         self.checkequal(False, 'hello', 'endswith', ('he', 'hel'), 0, 1)
 970         self.checkequal(True, 'hello', 'endswith', ('he', 'hell'), 0, 4)
 971
 972         self.checkraises(TypeError, 'hello', 'endswith', (42,))
 973
 974     def test___contains__(self):
 975         self.checkequal(True, '', '__contains__', '')
 976         self.checkequal(True, 'abc', '__contains__', '')
 977         self.checkequal(False, 'abc', '__contains__', '\0')
 978         self.checkequal(True, '\0abc', '__contains__', '\0')
 979         self.checkequal(True, 'abc\0', '__contains__', '\0')
 980         self.checkequal(True, '\0abc', '__contains__', 'a')
 981         self.checkequal(True, 'asdf', '__contains__', 'asdf')
 982         self.checkequal(False, 'asd', '__contains__', 'asdf')
 983         self.checkequal(False, '', '__contains__', 'asdf')
 984
 985     def test_subscript(self):
 986         self.checkequal(u'a', 'abc', '__getitem__', 0)
 987         self.checkequal(u'c', 'abc', '__getitem__', -1)
 988         self.checkequal(u'a', 'abc', '__getitem__', 0L)
 989         self.checkequal(u'abc', 'abc', '__getitem__', slice(0, 3))
 990         self.checkequal(u'abc', 'abc', '__getitem__', slice(0, 1000))
 991         self.checkequal(u'a', 'abc', '__getitem__', slice(0, 1))
 992         self.checkequal(u'', 'abc', '__getitem__', slice(0, 0))
 993
 994         self.checkraises(TypeError, 'abc', '__getitem__', 'def')
 995
 996     def test_slice(self):
 997         self.checkequal('abc', 'abc', '__getslice__', 0, 1000)
 998         self.checkequal('abc', 'abc', '__getslice__', 0, 3)
 999         self.checkequal('ab', 'abc', '__getslice__', 0, 2)
1000         self.checkequal('bc', 'abc', '__getslice__', 1, 3)
1001         self.checkequal('b', 'abc', '__getslice__', 1, 2)
1002         self.checkequal('', 'abc', '__getslice__', 2, 2)
1003         self.checkequal('', 'abc', '__getslice__', 1000, 1000)
1004         self.checkequal('', 'abc', '__getslice__', 2000, 1000)
1005         self.checkequal('', 'abc', '__getslice__', 2, 1)
1006
1007         self.checkraises(TypeError, 'abc', '__getslice__', 'def')
1008
1009     def test_extended_getslice(self):
1010         # Test extended slicing by comparing with list slicing.
1011         s = string.ascii_letters + string.digits
1012         indices = (0, None, 1, 3, 41, -1, -2, -37)
1013         for start in indices:
1014             for stop in indices:
1015                 # Skip step 0 (invalid)
1016                 for step in indices[1:]:
1017                     L = list(s)[start:stop:step]
1018                     self.checkequal(u"".join(L), s, '__getitem__',
1019                                     slice(start, stop, step))
1020
1021     def test_mul(self):
1022         self.checkequal('', 'abc', '__mul__', -1)
1023         self.checkequal('', 'abc', '__mul__', 0)
1024         self.checkequal('abc', 'abc', '__mul__', 1)
1025         self.checkequal('abcabcabc', 'abc', '__mul__', 3)
1026         self.checkraises(TypeError, 'abc', '__mul__')
1027         self.checkraises(TypeError, 'abc', '__mul__', '')
1028         # XXX: on a 64-bit system, this doesn't raise an overflow error,
1029         # but either raises a MemoryError, or succeeds (if you have 54TiB)
1030         #self.checkraises(OverflowError, 10000*'abc', '__mul__', 2000000000)
1031
1032     def test_join(self):
1033         # join now works with any sequence type
1034         # moved here, because the argument order is
1035         # different in string.join (see the test in
1036         # test.test_string.StringTest.test_join)
1037         self.checkequal('a b c d', ' ', 'join', ['a', 'b', 'c', 'd'])
1038         self.checkequal('abcd', '', 'join', ('a', 'b', 'c', 'd'))
1039         self.checkequal('bd', '', 'join', ('', 'b', '', 'd'))
1040         self.checkequal('ac', '', 'join', ('a', '', 'c', ''))
1041         self.checkequal('w x y z', ' ', 'join', Sequence())
1042         self.checkequal('abc', 'a', 'join', ('abc',))
1043         self.checkequal('z', 'a', 'join', UserList(['z']))
1044         if test_support.have_unicode:
1045             self.checkequal(unicode('a.b.c'), unicode('.'), 'join', ['a', 'b', 'c'])
1046             self.checkequal(unicode('a.b.c'), '.', 'join', [unicode('a'), 'b', 'c'])
1047             self.checkequal(unicode('a.b.c'), '.', 'join', ['a', unicode('b'), 'c'])
1048             self.checkequal(unicode('a.b.c'), '.', 'join', ['a', 'b', unicode('c')])
1049             self.checkraises(TypeError, '.', 'join', ['a', unicode('b'), 3])
1050         for i in [5, 25, 125]:
1051             self.checkequal(((('a' * i) + '-') * i)[:-1], '-', 'join',
1052                  ['a' * i] * i)
1053             self.checkequal(((('a' * i) + '-') * i)[:-1], '-', 'join',
1054                  ('a' * i,) * i)
1055
1056         self.checkraises(TypeError, ' ', 'join', BadSeq1())
1057         self.checkequal('a b c', ' ', 'join', BadSeq2())
1058
1059         self.checkraises(TypeError, ' ', 'join')
1060         self.checkraises(TypeError, ' ', 'join', 7)
1061         self.checkraises(TypeError, ' ', 'join', Sequence([7, 'hello', 123L]))
1062         try:
1063             def f():
1064                 yield 4 + ""
1065             self.fixtype(' ').join(f())
1066         except TypeError, e:
1067             if '+' not in str(e):
1068                 self.fail('join() ate exception message')
1069         else:
1070             self.fail('exception not raised')
1071
1072     def test_formatting(self):
1073         self.checkequal('+hello+', '+%s+', '__mod__', 'hello')
1074         self.checkequal('+10+', '+%d+', '__mod__', 10)
1075         self.checkequal('a', "%c", '__mod__', "a")
1076         self.checkequal('a', "%c", '__mod__', "a")
1077         self.checkequal('"', "%c", '__mod__', 34)
1078         self.checkequal('$', "%c", '__mod__', 36)
1079         self.checkequal('10', "%d", '__mod__', 10)
1080         self.checkequal('\x7f', "%c", '__mod__', 0x7f)
1081
1082         for ordinal in (-100, 0x200000):
1083             # unicode raises ValueError, str raises OverflowError
1084             self.checkraises((ValueError, OverflowError), '%c', '__mod__', ordinal)
1085
1086         longvalue = sys.maxint + 10L
1087         slongvalue = str(longvalue)
1088         if slongvalue[-1] in ("L","l"): slongvalue = slongvalue[:-1]
1089         self.checkequal(' 42', '%3ld', '__mod__', 42)
1090         self.checkequal('42', '%d', '__mod__', 42L)
1091         self.checkequal('42', '%d', '__mod__', 42.0)
1092         self.checkequal(slongvalue, '%d', '__mod__', longvalue)
1093         self.checkcall('%d', '__mod__', float(longvalue))
1094         self.checkequal('0042.00', '%07.2f', '__mod__', 42)
1095         self.checkequal('0042.00', '%07.2F', '__mod__', 42)
1096
1097         self.checkraises(TypeError, 'abc', '__mod__')
1098         self.checkraises(TypeError, '%(foo)s', '__mod__', 42)
1099         self.checkraises(TypeError, '%s%s', '__mod__', (42,))
1100         self.checkraises(TypeError, '%c', '__mod__', (None,))
1101         self.checkraises(ValueError, '%(foo', '__mod__', {})
1102         self.checkraises(TypeError, '%(foo)s %(bar)s', '__mod__', ('foo', 42))
1103         self.checkraises(TypeError, '%d', '__mod__', "42") # not numeric
1104         self.checkraises(TypeError, '%d', '__mod__', (42+0j)) # no int/long conversion provided
1105
1106         # argument names with properly nested brackets are supported
1107         self.checkequal('bar', '%((foo))s', '__mod__', {'(foo)': 'bar'})
1108
1109         # 100 is a magic number in PyUnicode_Format, this forces a resize
1110         self.checkequal(103*'a'+'x', '%sx', '__mod__', 103*'a')
1111
1112         self.checkraises(TypeError, '%*s', '__mod__', ('foo', 'bar'))
1113         self.checkraises(TypeError, '%10.*f', '__mod__', ('foo', 42.))
1114         self.checkraises(ValueError, '%10', '__mod__', (42,))
1115
1116     def test_floatformatting(self):
1117         # float formatting
1118         for prec in xrange(100):
1119             format = '%%.%if' % prec
1120             value = 0.01
1121             for x in xrange(60):
1122                 value = value * 3.14159265359 / 3.0 * 10.0
1123                 self.checkcall(format, "__mod__", value)
1124
1125     def test_inplace_rewrites(self):
1126         # Check that strings don't copy and modify cached single-character strings
1127         self.checkequal('a', 'A', 'lower')
1128         self.checkequal(True, 'A', 'isupper')
1129         self.checkequal('A', 'a', 'upper')
1130         self.checkequal(True, 'a', 'islower')
1131
1132         self.checkequal('a', 'A', 'replace', 'A', 'a')
1133         self.checkequal(True, 'A', 'isupper')
1134
1135         self.checkequal('A', 'a', 'capitalize')
1136         self.checkequal(True, 'a', 'islower')
1137
1138         self.checkequal('A', 'a', 'swapcase')
1139         self.checkequal(True, 'a', 'islower')
1140
1141         self.checkequal('A', 'a', 'title')
1142         self.checkequal(True, 'a', 'islower')
1143
1144     def test_partition(self):
1145
1146         self.checkequal(('this is the par', 'ti', 'tion method'),
1147             'this is the partition method', 'partition', 'ti')
1148
1149         # from raymond's original specification
1150         S = 'http://www.python.org'
1151         self.checkequal(('http', '://', 'www.python.org'), S, 'partition', '://')
1152         self.checkequal(('http://www.python.org', '', ''), S, 'partition', '?')
1153         self.checkequal(('', 'http://', 'www.python.org'), S, 'partition', 'http://')
1154         self.checkequal(('http://www.python.', 'org', ''), S, 'partition', 'org')
1155
1156         self.checkraises(ValueError, S, 'partition', '')
1157         self.checkraises(TypeError, S, 'partition', None)
1158
1159         # mixed use of str and unicode
1160         self.assertEqual('a/b/c'.partition(u'/'), ('a', '/', 'b/c'))
1161
1162     def test_rpartition(self):
1163
1164         self.checkequal(('this is the rparti', 'ti', 'on method'),
1165             'this is the rpartition method', 'rpartition', 'ti')
1166
1167         # from raymond's original specification
1168         S = 'http://www.python.org'
1169         self.checkequal(('http', '://', 'www.python.org'), S, 'rpartition', '://')
1170         self.checkequal(('', '', 'http://www.python.org'), S, 'rpartition', '?')
1171         self.checkequal(('', 'http://', 'www.python.org'), S, 'rpartition', 'http://')
1172         self.checkequal(('http://www.python.', 'org', ''), S, 'rpartition', 'org')
1173
1174         self.checkraises(ValueError, S, 'rpartition', '')
1175         self.checkraises(TypeError, S, 'rpartition', None)
1176
1177         # mixed use of str and unicode
1178         self.assertEqual('a/b/c'.rpartition(u'/'), ('a/b', '/', 'c'))
1179
1180     def test_none_arguments(self):
1181         # issue 11828
1182         s = 'hello'
1183         self.checkequal(2, s, 'find', 'l', None)
1184         self.checkequal(3, s, 'find', 'l', -2, None)
1185         self.checkequal(2, s, 'find', 'l', None, -2)
1186         self.checkequal(0, s, 'find', 'h', None, None)
1187
1188         self.checkequal(3, s, 'rfind', 'l', None)
1189         self.checkequal(3, s, 'rfind', 'l', -2, None)
1190         self.checkequal(2, s, 'rfind', 'l', None, -2)
1191         self.checkequal(0, s, 'rfind', 'h', None, None)
1192
1193         self.checkequal(2, s, 'index', 'l', None)
1194         self.checkequal(3, s, 'index', 'l', -2, None)
1195         self.checkequal(2, s, 'index', 'l', None, -2)
1196         self.checkequal(0, s, 'index', 'h', None, None)
1197
1198         self.checkequal(3, s, 'rindex', 'l', None)
1199         self.checkequal(3, s, 'rindex', 'l', -2, None)
1200         self.checkequal(2, s, 'rindex', 'l', None, -2)
1201         self.checkequal(0, s, 'rindex', 'h', None, None)
1202
1203         self.checkequal(2, s, 'count', 'l', None)
1204         self.checkequal(1, s, 'count', 'l', -2, None)
1205         self.checkequal(1, s, 'count', 'l', None, -2)
1206         self.checkequal(0, s, 'count', 'x', None, None)
1207
1208         self.checkequal(True, s, 'endswith', 'o', None)
1209         self.checkequal(True, s, 'endswith', 'lo', -2, None)
1210         self.checkequal(True, s, 'endswith', 'l', None, -2)
1211         self.checkequal(False, s, 'endswith', 'x', None, None)
1212
1213         self.checkequal(True, s, 'startswith', 'h', None)
1214         self.checkequal(True, s, 'startswith', 'l', -2, None)
1215         self.checkequal(True, s, 'startswith', 'h', None, -2)
1216         self.checkequal(False, s, 'startswith', 'x', None, None)
1217
1218     def test_find_etc_raise_correct_error_messages(self):
1219         # issue 11828
1220         s = 'hello'
1221         x = 'x'
1222         self.assertRaisesRegexp(TypeError, r'\bfind\b', s.find,
1223                                 x, None, None, None)
1224         self.assertRaisesRegexp(TypeError, r'\brfind\b', s.rfind,
1225                                 x, None, None, None)
1226         self.assertRaisesRegexp(TypeError, r'\bindex\b', s.index,
1227                                 x, None, None, None)
1228         self.assertRaisesRegexp(TypeError, r'\brindex\b', s.rindex,
1229                                 x, None, None, None)
1230         self.assertRaisesRegexp(TypeError, r'^count\(', s.count,
1231                                 x, None, None, None)
1232         self.assertRaisesRegexp(TypeError, r'^startswith\(', s.startswith,
1233                                 x, None, None, None)
1234         self.assertRaisesRegexp(TypeError, r'^endswith\(', s.endswith,
1235                                 x, None, None, None)
1236
1237 class MixinStrStringUserStringTest:
1238     # Additional tests for 8bit strings, i.e. str, UserString and
1239     # the string module
1240
1241     def test_maketrans(self):
1242         self.assertEqual(
1243            ''.join(map(chr, xrange(256))).replace('abc', 'xyz'),
1244            string.maketrans('abc', 'xyz')
1245         )
1246         self.assertRaises(ValueError, string.maketrans, 'abc', 'xyzw')
1247
1248     def test_translate(self):
1249         table = string.maketrans('abc', 'xyz')
1250         self.checkequal('xyzxyz', 'xyzabcdef', 'translate', table, 'def')
1251
1252         table = string.maketrans('a', 'A')
1253         self.checkequal('Abc', 'abc', 'translate', table)
1254         self.checkequal('xyz', 'xyz', 'translate', table)
1255         self.checkequal('yz', 'xyz', 'translate', table, 'x')
1256         self.checkequal('yx', 'zyzzx', 'translate', None, 'z')
1257         self.checkequal('zyzzx', 'zyzzx', 'translate', None, '')
1258         self.checkequal('zyzzx', 'zyzzx', 'translate', None)
1259         self.checkraises(ValueError, 'xyz', 'translate', 'too short', 'strip')
1260         self.checkraises(ValueError, 'xyz', 'translate', 'too short')
1261
1262
1263 class MixinStrUserStringTest:
1264     # Additional tests that only work with
1265     # 8bit compatible object, i.e. str and UserString
1266
1267     if test_support.have_unicode:
1268         def test_encoding_decoding(self):
1269             codecs = [('rot13', 'uryyb jbeyq'),
1270                       ('base64', 'aGVsbG8gd29ybGQ=\n'),
1271                       ('hex', '68656c6c6f20776f726c64'),
1272                       ('uu', 'begin 666 <data>\n+:&5L;&\\@=V]R;&0 \n \nend\n')]
1273             for encoding, data in codecs:
1274                 self.checkequal(data, 'hello world', 'encode', encoding)
1275                 self.checkequal('hello world', data, 'decode', encoding)
1276             # zlib is optional, so we make the test optional too...
1277             try:
1278                 import zlib
1279             except ImportError:
1280                 pass
1281             else:
1282                 data = 'x\x9c\xcbH\xcd\xc9\xc9W(\xcf/\xcaI\x01\x00\x1a\x0b\x04]'
1283                 self.checkequal(data, 'hello world', 'encode', 'zlib')
1284                 self.checkequal('hello world', data, 'decode', 'zlib')
1285
1286             self.checkraises(TypeError, 'xyz', 'decode', 42)
1287             self.checkraises(TypeError, 'xyz', 'encode', 42)
1288
1289
1290 class MixinStrUnicodeTest:
1291     # Additional tests that only work with str and unicode.
1292
1293     def test_bug1001011(self):
1294         # Make sure join returns a NEW object for single item sequences
1295         # involving a subclass.
1296         # Make sure that it is of the appropriate type.
1297         # Check the optimisation still occurs for standard objects.
1298         t = self.type2test
1299         class subclass(t):
1300             pass
1301         s1 = subclass("abcd")
1302         s2 = t().join([s1])
1303         self.assertTrue(s1 is not s2)
1304         self.assertTrue(type(s2) is t)
1305
1306         s1 = t("abcd")
1307         s2 = t().join([s1])
1308         self.assertTrue(s1 is s2)
1309
1310         # Should also test mixed-type join.
1311         if t is unicode:
1312             s1 = subclass("abcd")
1313             s2 = "".join([s1])
1314             self.assertTrue(s1 is not s2)
1315             self.assertTrue(type(s2) is t)
1316
1317             s1 = t("abcd")
1318             s2 = "".join([s1])
1319             self.assertTrue(s1 is s2)
1320
1321         elif t is str:
1322             s1 = subclass("abcd")
1323             s2 = u"".join([s1])
1324             self.assertTrue(s1 is not s2)
1325             self.assertTrue(type(s2) is unicode) # promotes!
1326
1327             s1 = t("abcd")
1328             s2 = u"".join([s1])
1329             self.assertTrue(s1 is not s2)
1330             self.assertTrue(type(s2) is unicode) # promotes!
1331
1332         else:
1333             self.fail("unexpected type for MixinStrUnicodeTest %r" % t)