Lib/test/test_string.py

   1 import unittest, string
   2 from test import test_support, string_tests
   3 from UserList import UserList
   4
   5 class StringTest(
   6     string_tests.CommonTest,
   7     string_tests.MixinStrStringUserStringTest
   8     ):
   9
  10     type2test = str
  11
  12     def checkequal(self, result, object, methodname, *args):
  13         realresult = getattr(string, methodname)(object, *args)
  14         self.assertEqual(
  15             result,
  16             realresult
  17         )
  18
  19     def checkraises(self, exc, object, methodname, *args):
  20         self.assertRaises(
  21             exc,
  22             getattr(string, methodname),
  23             object,
  24             *args
  25         )
  26
  27     def checkcall(self, object, methodname, *args):
  28         getattr(string, methodname)(object, *args)
  29
  30     def test_join(self):
  31         # These are the same checks as in string_test.ObjectTest.test_join
  32         # but the argument order ist different
  33         self.checkequal('a b c d', ['a', 'b', 'c', 'd'], 'join', ' ')
  34         self.checkequal('abcd', ('a', 'b', 'c', 'd'), 'join', '')
  35         self.checkequal('w x y z', string_tests.Sequence(), 'join', ' ')
  36         self.checkequal('abc', ('abc',), 'join', 'a')
  37         self.checkequal('z', UserList(['z']), 'join', 'a')
  38         if test_support.have_unicode:
  39             self.checkequal(unicode('a.b.c'), ['a', 'b', 'c'], 'join', unicode('.'))
  40             self.checkequal(unicode('a.b.c'), [unicode('a'), 'b', 'c'], 'join', '.')
  41             self.checkequal(unicode('a.b.c'), ['a', unicode('b'), 'c'], 'join', '.')
  42             self.checkequal(unicode('a.b.c'), ['a', 'b', unicode('c')], 'join', '.')
  43             self.checkraises(TypeError, ['a', unicode('b'), 3], 'join', '.')
  44         for i in [5, 25, 125]:
  45             self.checkequal(
  46                 ((('a' * i) + '-') * i)[:-1],
  47                 ['a' * i] * i, 'join', '-')
  48             self.checkequal(
  49                 ((('a' * i) + '-') * i)[:-1],
  50                 ('a' * i,) * i, 'join', '-')
  51
  52         self.checkraises(TypeError, string_tests.BadSeq1(), 'join', ' ')
  53         self.checkequal('a b c', string_tests.BadSeq2(), 'join', ' ')
  54         try:
  55             def f():
  56                 yield 4 + ""
  57             self.fixtype(' ').join(f())
  58         except TypeError, e:
  59             if '+' not in str(e):
  60                 self.fail('join() ate exception message')
  61         else:
  62             self.fail('exception not raised')
  63
  64
  65
  66
  67 class ModuleTest(unittest.TestCase):
  68
  69     def test_attrs(self):
  70         string.whitespace
  71         string.lowercase
  72         string.uppercase
  73         string.letters
  74         string.digits
  75         string.hexdigits
  76         string.octdigits
  77         string.punctuation
  78         string.printable
  79
  80     def test_atoi(self):
  81         self.assertEqual(string.atoi(" 1 "), 1)
  82         self.assertRaises(ValueError, string.atoi, " 1x")
  83         self.assertRaises(ValueError, string.atoi, " x1 ")
  84
  85     def test_atol(self):
  86         self.assertEqual(string.atol("  1  "), 1L)
  87         self.assertRaises(ValueError, string.atol, "  1x ")
  88         self.assertRaises(ValueError, string.atol, "  x1 ")
  89
  90     def test_atof(self):
  91         self.assertAlmostEqual(string.atof("  1  "), 1.0)
  92         self.assertRaises(ValueError, string.atof, "  1x ")
  93         self.assertRaises(ValueError, string.atof, "  x1 ")
  94
  95     def test_maketrans(self):
  96         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'
  97
  98         self.assertEqual(string.maketrans('abc', 'xyz'), transtable)
  99         self.assertRaises(ValueError, string.maketrans, 'abc', 'xyzq')
 100
 101     def test_capwords(self):
 102         self.assertEqual(string.capwords('abc def ghi'), 'Abc Def Ghi')
 103         self.assertEqual(string.capwords('abc\tdef\nghi'), 'Abc Def Ghi')
 104         self.assertEqual(string.capwords('abc\t   def  \nghi'), 'Abc Def Ghi')
 105         self.assertEqual(string.capwords('ABC DEF GHI'), 'Abc Def Ghi')
 106         self.assertEqual(string.capwords('ABC-DEF-GHI', '-'), 'Abc-Def-Ghi')
 107         self.assertEqual(string.capwords('ABC-def DEF-ghi GHI'), 'Abc-def Def-ghi Ghi')
 108         self.assertEqual(string.capwords('   aBc  DeF   '), 'Abc Def')
 109         self.assertEqual(string.capwords('\taBc\tDeF\t'), 'Abc Def')
 110         self.assertEqual(string.capwords('\taBc\tDeF\t', '\t'), '\tAbc\tDef\t')
 111
 112     def test_formatter(self):
 113         fmt = string.Formatter()
 114         self.assertEqual(fmt.format("foo"), "foo")
 115
 116         self.assertEqual(fmt.format("foo{0}", "bar"), "foobar")
 117         self.assertEqual(fmt.format("foo{1}{0}-{1}", "bar", 6), "foo6bar-6")
 118         self.assertEqual(fmt.format("-{arg!r}-", arg='test'), "-'test'-")
 119
 120         # override get_value ############################################
 121         class NamespaceFormatter(string.Formatter):
 122             def __init__(self, namespace={}):
 123                 string.Formatter.__init__(self)
 124                 self.namespace = namespace
 125
 126             def get_value(self, key, args, kwds):
 127                 if isinstance(key, str):
 128                     try:
 129                         # Check explicitly passed arguments first
 130                         return kwds[key]
 131                     except KeyError:
 132                         return self.namespace[key]
 133                 else:
 134                     string.Formatter.get_value(key, args, kwds)
 135
 136         fmt = NamespaceFormatter({'greeting':'hello'})
 137         self.assertEqual(fmt.format("{greeting}, world!"), 'hello, world!')
 138
 139
 140         # override format_field #########################################
 141         class CallFormatter(string.Formatter):
 142             def format_field(self, value, format_spec):
 143                 return format(value(), format_spec)
 144
 145         fmt = CallFormatter()
 146         self.assertEqual(fmt.format('*{0}*', lambda : 'result'), '*result*')
 147
 148
 149         # override convert_field ########################################
 150         class XFormatter(string.Formatter):
 151             def convert_field(self, value, conversion):
 152                 if conversion == 'x':
 153                     return None
 154                 return super(XFormatter, self).convert_field(value, conversion)
 155
 156         fmt = XFormatter()
 157         self.assertEqual(fmt.format("{0!r}:{0!x}", 'foo', 'foo'), "'foo':None")
 158
 159
 160         # override parse ################################################
 161         class BarFormatter(string.Formatter):
 162             # returns an iterable that contains tuples of the form:
 163             # (literal_text, field_name, format_spec, conversion)
 164             def parse(self, format_string):
 165                 for field in format_string.split('|'):
 166                     if field[0] == '+':
 167                         # it's markup
 168                         field_name, _, format_spec = field[1:].partition(':')
 169                         yield '', field_name, format_spec, None
 170                     else:
 171                         yield field, None, None, None
 172
 173         fmt = BarFormatter()
 174         self.assertEqual(fmt.format('*|+0:^10s|*', 'foo'), '*   foo    *')
 175
 176         # test all parameters used
 177         class CheckAllUsedFormatter(string.Formatter):
 178             def check_unused_args(self, used_args, args, kwargs):
 179                 # Track which arguments actuallly got used
 180                 unused_args = set(kwargs.keys())
 181                 unused_args.update(range(0, len(args)))
 182
 183                 for arg in used_args:
 184                     unused_args.remove(arg)
 185
 186                 if unused_args:
 187                     raise ValueError("unused arguments")
 188
 189         fmt = CheckAllUsedFormatter()
 190         self.assertEqual(fmt.format("{0}", 10), "10")
 191         self.assertEqual(fmt.format("{0}{i}", 10, i=100), "10100")
 192         self.assertEqual(fmt.format("{0}{i}{1}", 10, 20, i=100), "1010020")
 193         self.assertRaises(ValueError, fmt.format, "{0}{i}{1}", 10, 20, i=100, j=0)
 194         self.assertRaises(ValueError, fmt.format, "{0}", 10, 20)
 195         self.assertRaises(ValueError, fmt.format, "{0}", 10, 20, i=100)
 196         self.assertRaises(ValueError, fmt.format, "{i}", 10, 20, i=100)
 197
 198         # Alternate formatting is not supported
 199         self.assertRaises(ValueError, format, '', '#')
 200         self.assertRaises(ValueError, format, '', '#20')
 201
 202 class BytesAliasTest(unittest.TestCase):
 203
 204     def test_builtin(self):
 205         self.assertTrue(str is bytes)
 206
 207     def test_syntax(self):
 208         self.assertEqual(b"spam", "spam")
 209         self.assertEqual(br"egg\foo", "egg\\foo")
 210         self.assertTrue(type(b""), str)
 211         self.assertTrue(type(br""), str)
 212
 213 def test_main():
 214     test_support.run_unittest(StringTest, ModuleTest, BytesAliasTest)
 215
 216 if __name__ == "__main__":
 217     test_main()