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1 |
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2 import struct |
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3 import sys |
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4 from test import test_support, string_tests |
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5 |
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6 |
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7 class StrTest( |
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8 string_tests.CommonTest, |
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9 string_tests.MixinStrUnicodeUserStringTest, |
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10 string_tests.MixinStrUserStringTest, |
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11 string_tests.MixinStrUnicodeTest, |
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12 ): |
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13 |
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14 type2test = str |
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15 |
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16 # We don't need to propagate to str |
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17 def fixtype(self, obj): |
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18 return obj |
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19 |
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20 def test_basic_creation(self): |
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21 self.assertEqual(str(''), '') |
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22 self.assertEqual(str(0), '0') |
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23 self.assertEqual(str(0L), '0') |
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24 self.assertEqual(str(()), '()') |
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25 self.assertEqual(str([]), '[]') |
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26 self.assertEqual(str({}), '{}') |
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27 a = [] |
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28 a.append(a) |
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29 self.assertEqual(str(a), '[[...]]') |
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30 a = {} |
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31 a[0] = a |
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32 self.assertEqual(str(a), '{0: {...}}') |
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33 |
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34 def test_formatting(self): |
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35 string_tests.MixinStrUnicodeUserStringTest.test_formatting(self) |
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36 self.assertRaises(OverflowError, '%c'.__mod__, 0x1234) |
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37 |
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38 def test_conversion(self): |
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39 # Make sure __str__() behaves properly |
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40 class Foo0: |
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41 def __unicode__(self): |
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42 return u"foo" |
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43 |
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44 class Foo1: |
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45 def __str__(self): |
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46 return "foo" |
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47 |
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48 class Foo2(object): |
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49 def __str__(self): |
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50 return "foo" |
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51 |
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52 class Foo3(object): |
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53 def __str__(self): |
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54 return u"foo" |
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55 |
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56 class Foo4(unicode): |
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57 def __str__(self): |
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58 return u"foo" |
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59 |
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60 class Foo5(str): |
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61 def __str__(self): |
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62 return u"foo" |
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63 |
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64 class Foo6(str): |
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65 def __str__(self): |
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66 return "foos" |
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67 |
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68 def __unicode__(self): |
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69 return u"foou" |
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70 |
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71 class Foo7(unicode): |
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72 def __str__(self): |
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73 return "foos" |
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74 def __unicode__(self): |
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75 return u"foou" |
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76 |
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77 class Foo8(str): |
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78 def __new__(cls, content=""): |
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79 return str.__new__(cls, 2*content) |
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80 def __str__(self): |
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81 return self |
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82 |
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83 class Foo9(str): |
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84 def __str__(self): |
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85 return "string" |
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86 def __unicode__(self): |
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87 return "not unicode" |
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88 |
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89 self.assert_(str(Foo0()).startswith("<")) # this is different from __unicode__ |
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90 self.assertEqual(str(Foo1()), "foo") |
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91 self.assertEqual(str(Foo2()), "foo") |
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92 self.assertEqual(str(Foo3()), "foo") |
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93 self.assertEqual(str(Foo4("bar")), "foo") |
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94 self.assertEqual(str(Foo5("bar")), "foo") |
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95 self.assertEqual(str(Foo6("bar")), "foos") |
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96 self.assertEqual(str(Foo7("bar")), "foos") |
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97 self.assertEqual(str(Foo8("foo")), "foofoo") |
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98 self.assertEqual(str(Foo9("foo")), "string") |
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99 self.assertEqual(unicode(Foo9("foo")), u"not unicode") |
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100 |
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101 def test_expandtabs_overflows_gracefully(self): |
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102 # This test only affects 32-bit platforms because expandtabs can only take |
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103 # an int as the max value, not a 64-bit C long. If expandtabs is changed |
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104 # to take a 64-bit long, this test should apply to all platforms. |
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105 if sys.maxint > (1 << 32) or struct.calcsize('P') != 4: |
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106 return |
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107 self.assertRaises(OverflowError, 't\tt\t'.expandtabs, sys.maxint) |
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108 |
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109 def test__format__(self): |
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110 def test(value, format, expected): |
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111 # test both with and without the trailing 's' |
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112 self.assertEqual(value.__format__(format), expected) |
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113 self.assertEqual(value.__format__(format + 's'), expected) |
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114 |
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115 test('', '', '') |
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116 test('abc', '', 'abc') |
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117 test('abc', '.3', 'abc') |
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118 test('ab', '.3', 'ab') |
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119 test('abcdef', '.3', 'abc') |
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120 test('abcdef', '.0', '') |
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121 test('abc', '3.3', 'abc') |
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122 test('abc', '2.3', 'abc') |
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123 test('abc', '2.2', 'ab') |
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124 test('abc', '3.2', 'ab ') |
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125 test('result', 'x<0', 'result') |
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126 test('result', 'x<5', 'result') |
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127 test('result', 'x<6', 'result') |
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128 test('result', 'x<7', 'resultx') |
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129 test('result', 'x<8', 'resultxx') |
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130 test('result', ' <7', 'result ') |
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131 test('result', '<7', 'result ') |
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132 test('result', '>7', ' result') |
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133 test('result', '>8', ' result') |
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134 test('result', '^8', ' result ') |
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135 test('result', '^9', ' result ') |
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136 test('result', '^10', ' result ') |
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137 test('a', '10000', 'a' + ' ' * 9999) |
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138 test('', '10000', ' ' * 10000) |
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139 test('', '10000000', ' ' * 10000000) |
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140 |
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141 def test_format(self): |
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142 self.assertEqual(''.format(), '') |
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143 self.assertEqual('a'.format(), 'a') |
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144 self.assertEqual('ab'.format(), 'ab') |
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145 self.assertEqual('a{{'.format(), 'a{') |
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146 self.assertEqual('a}}'.format(), 'a}') |
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147 self.assertEqual('{{b'.format(), '{b') |
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148 self.assertEqual('}}b'.format(), '}b') |
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149 self.assertEqual('a{{b'.format(), 'a{b') |
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150 |
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151 # examples from the PEP: |
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152 import datetime |
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153 self.assertEqual("My name is {0}".format('Fred'), "My name is Fred") |
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154 self.assertEqual("My name is {0[name]}".format(dict(name='Fred')), |
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155 "My name is Fred") |
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156 self.assertEqual("My name is {0} :-{{}}".format('Fred'), |
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157 "My name is Fred :-{}") |
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158 |
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159 d = datetime.date(2007, 8, 18) |
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160 self.assertEqual("The year is {0.year}".format(d), |
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161 "The year is 2007") |
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162 |
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163 # classes we'll use for testing |
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164 class C: |
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165 def __init__(self, x=100): |
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166 self._x = x |
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167 def __format__(self, spec): |
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168 return spec |
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169 |
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170 class D: |
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171 def __init__(self, x): |
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172 self.x = x |
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173 def __format__(self, spec): |
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174 return str(self.x) |
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175 |
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176 # class with __str__, but no __format__ |
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177 class E: |
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178 def __init__(self, x): |
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179 self.x = x |
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180 def __str__(self): |
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181 return 'E(' + self.x + ')' |
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182 |
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183 # class with __repr__, but no __format__ or __str__ |
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184 class F: |
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185 def __init__(self, x): |
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186 self.x = x |
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187 def __repr__(self): |
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188 return 'F(' + self.x + ')' |
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189 |
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190 # class with __format__ that forwards to string, for some format_spec's |
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191 class G: |
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192 def __init__(self, x): |
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193 self.x = x |
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194 def __str__(self): |
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195 return "string is " + self.x |
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196 def __format__(self, format_spec): |
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197 if format_spec == 'd': |
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198 return 'G(' + self.x + ')' |
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199 return object.__format__(self, format_spec) |
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200 |
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201 # class that returns a bad type from __format__ |
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202 class H: |
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203 def __format__(self, format_spec): |
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204 return 1.0 |
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205 |
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206 class I(datetime.date): |
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207 def __format__(self, format_spec): |
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208 return self.strftime(format_spec) |
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209 |
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210 class J(int): |
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211 def __format__(self, format_spec): |
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212 return int.__format__(self * 2, format_spec) |
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213 |
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214 |
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215 self.assertEqual(''.format(), '') |
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216 self.assertEqual('abc'.format(), 'abc') |
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217 self.assertEqual('{0}'.format('abc'), 'abc') |
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218 self.assertEqual('{0:}'.format('abc'), 'abc') |
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219 self.assertEqual('X{0}'.format('abc'), 'Xabc') |
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220 self.assertEqual('{0}X'.format('abc'), 'abcX') |
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221 self.assertEqual('X{0}Y'.format('abc'), 'XabcY') |
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222 self.assertEqual('{1}'.format(1, 'abc'), 'abc') |
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223 self.assertEqual('X{1}'.format(1, 'abc'), 'Xabc') |
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224 self.assertEqual('{1}X'.format(1, 'abc'), 'abcX') |
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225 self.assertEqual('X{1}Y'.format(1, 'abc'), 'XabcY') |
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226 self.assertEqual('{0}'.format(-15), '-15') |
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227 self.assertEqual('{0}{1}'.format(-15, 'abc'), '-15abc') |
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228 self.assertEqual('{0}X{1}'.format(-15, 'abc'), '-15Xabc') |
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229 self.assertEqual('{{'.format(), '{') |
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230 self.assertEqual('}}'.format(), '}') |
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231 self.assertEqual('{{}}'.format(), '{}') |
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232 self.assertEqual('{{x}}'.format(), '{x}') |
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233 self.assertEqual('{{{0}}}'.format(123), '{123}') |
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234 self.assertEqual('{{{{0}}}}'.format(), '{{0}}') |
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235 self.assertEqual('}}{{'.format(), '}{') |
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236 self.assertEqual('}}x{{'.format(), '}x{') |
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237 |
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238 # weird field names |
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239 self.assertEqual("{0[foo-bar]}".format({'foo-bar':'baz'}), 'baz') |
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240 self.assertEqual("{0[foo bar]}".format({'foo bar':'baz'}), 'baz') |
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241 self.assertEqual("{0[ ]}".format({' ':3}), '3') |
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242 |
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243 self.assertEqual('{foo._x}'.format(foo=C(20)), '20') |
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244 self.assertEqual('{1}{0}'.format(D(10), D(20)), '2010') |
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245 self.assertEqual('{0._x.x}'.format(C(D('abc'))), 'abc') |
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246 self.assertEqual('{0[0]}'.format(['abc', 'def']), 'abc') |
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247 self.assertEqual('{0[1]}'.format(['abc', 'def']), 'def') |
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248 self.assertEqual('{0[1][0]}'.format(['abc', ['def']]), 'def') |
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249 self.assertEqual('{0[1][0].x}'.format(['abc', [D('def')]]), 'def') |
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250 |
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251 # strings |
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252 self.assertEqual('{0:.3s}'.format('abc'), 'abc') |
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253 self.assertEqual('{0:.3s}'.format('ab'), 'ab') |
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254 self.assertEqual('{0:.3s}'.format('abcdef'), 'abc') |
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255 self.assertEqual('{0:.0s}'.format('abcdef'), '') |
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256 self.assertEqual('{0:3.3s}'.format('abc'), 'abc') |
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257 self.assertEqual('{0:2.3s}'.format('abc'), 'abc') |
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258 self.assertEqual('{0:2.2s}'.format('abc'), 'ab') |
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259 self.assertEqual('{0:3.2s}'.format('abc'), 'ab ') |
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260 self.assertEqual('{0:x<0s}'.format('result'), 'result') |
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261 self.assertEqual('{0:x<5s}'.format('result'), 'result') |
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262 self.assertEqual('{0:x<6s}'.format('result'), 'result') |
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263 self.assertEqual('{0:x<7s}'.format('result'), 'resultx') |
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264 self.assertEqual('{0:x<8s}'.format('result'), 'resultxx') |
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265 self.assertEqual('{0: <7s}'.format('result'), 'result ') |
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266 self.assertEqual('{0:<7s}'.format('result'), 'result ') |
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267 self.assertEqual('{0:>7s}'.format('result'), ' result') |
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268 self.assertEqual('{0:>8s}'.format('result'), ' result') |
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269 self.assertEqual('{0:^8s}'.format('result'), ' result ') |
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270 self.assertEqual('{0:^9s}'.format('result'), ' result ') |
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271 self.assertEqual('{0:^10s}'.format('result'), ' result ') |
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272 self.assertEqual('{0:10000}'.format('a'), 'a' + ' ' * 9999) |
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273 self.assertEqual('{0:10000}'.format(''), ' ' * 10000) |
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274 self.assertEqual('{0:10000000}'.format(''), ' ' * 10000000) |
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275 |
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276 # format specifiers for user defined type |
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277 self.assertEqual('{0:abc}'.format(C()), 'abc') |
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278 |
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279 # !r and !s coersions |
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280 self.assertEqual('{0!s}'.format('Hello'), 'Hello') |
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281 self.assertEqual('{0!s:}'.format('Hello'), 'Hello') |
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282 self.assertEqual('{0!s:15}'.format('Hello'), 'Hello ') |
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283 self.assertEqual('{0!s:15s}'.format('Hello'), 'Hello ') |
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284 self.assertEqual('{0!r}'.format('Hello'), "'Hello'") |
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285 self.assertEqual('{0!r:}'.format('Hello'), "'Hello'") |
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286 self.assertEqual('{0!r}'.format(F('Hello')), 'F(Hello)') |
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287 |
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288 # test fallback to object.__format__ |
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289 self.assertEqual('{0}'.format({}), '{}') |
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290 self.assertEqual('{0}'.format([]), '[]') |
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291 self.assertEqual('{0}'.format([1]), '[1]') |
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292 self.assertEqual('{0}'.format(E('data')), 'E(data)') |
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293 self.assertEqual('{0:^10}'.format(E('data')), ' E(data) ') |
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294 self.assertEqual('{0:^10s}'.format(E('data')), ' E(data) ') |
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295 self.assertEqual('{0:d}'.format(G('data')), 'G(data)') |
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296 self.assertEqual('{0:>15s}'.format(G('data')), ' string is data') |
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297 self.assertEqual('{0!s}'.format(G('data')), 'string is data') |
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298 |
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299 self.assertEqual("{0:date: %Y-%m-%d}".format(I(year=2007, |
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300 month=8, |
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301 day=27)), |
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302 "date: 2007-08-27") |
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303 |
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304 # test deriving from a builtin type and overriding __format__ |
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305 self.assertEqual("{0}".format(J(10)), "20") |
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306 |
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307 |
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308 # string format specifiers |
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309 self.assertEqual('{0:}'.format('a'), 'a') |
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310 |
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311 # computed format specifiers |
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312 self.assertEqual("{0:.{1}}".format('hello world', 5), 'hello') |
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313 self.assertEqual("{0:.{1}s}".format('hello world', 5), 'hello') |
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314 self.assertEqual("{0:.{precision}s}".format('hello world', precision=5), 'hello') |
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315 self.assertEqual("{0:{width}.{precision}s}".format('hello world', width=10, precision=5), 'hello ') |
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316 self.assertEqual("{0:{width}.{precision}s}".format('hello world', width='10', precision='5'), 'hello ') |
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317 |
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318 # test various errors |
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319 self.assertRaises(ValueError, '{'.format) |
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320 self.assertRaises(ValueError, '}'.format) |
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321 self.assertRaises(ValueError, 'a{'.format) |
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322 self.assertRaises(ValueError, 'a}'.format) |
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323 self.assertRaises(ValueError, '{a'.format) |
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324 self.assertRaises(ValueError, '}a'.format) |
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325 self.assertRaises(IndexError, '{0}'.format) |
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326 self.assertRaises(IndexError, '{1}'.format, 'abc') |
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327 self.assertRaises(KeyError, '{x}'.format) |
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328 self.assertRaises(ValueError, "}{".format) |
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329 self.assertRaises(ValueError, "{".format) |
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330 self.assertRaises(ValueError, "}".format) |
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331 self.assertRaises(ValueError, "abc{0:{}".format) |
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332 self.assertRaises(ValueError, "{0".format) |
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333 self.assertRaises(IndexError, "{0.}".format) |
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334 self.assertRaises(ValueError, "{0.}".format, 0) |
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335 self.assertRaises(IndexError, "{0[}".format) |
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336 self.assertRaises(ValueError, "{0[}".format, []) |
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337 self.assertRaises(KeyError, "{0]}".format) |
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338 self.assertRaises(ValueError, "{0.[]}".format, 0) |
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339 self.assertRaises(ValueError, "{0..foo}".format, 0) |
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340 self.assertRaises(ValueError, "{0[0}".format, 0) |
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341 self.assertRaises(ValueError, "{0[0:foo}".format, 0) |
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342 self.assertRaises(KeyError, "{c]}".format) |
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343 self.assertRaises(ValueError, "{{ {{{0}}".format, 0) |
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344 self.assertRaises(ValueError, "{0}}".format, 0) |
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345 self.assertRaises(KeyError, "{foo}".format, bar=3) |
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346 self.assertRaises(ValueError, "{0!x}".format, 3) |
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347 self.assertRaises(ValueError, "{0!}".format, 0) |
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348 self.assertRaises(ValueError, "{0!rs}".format, 0) |
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349 self.assertRaises(ValueError, "{!}".format) |
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350 self.assertRaises(ValueError, "{:}".format) |
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351 self.assertRaises(ValueError, "{:s}".format) |
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352 self.assertRaises(ValueError, "{}".format) |
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353 |
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354 # can't have a replacement on the field name portion |
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355 self.assertRaises(TypeError, '{0[{1}]}'.format, 'abcdefg', 4) |
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356 |
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357 # exceed maximum recursion depth |
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358 self.assertRaises(ValueError, "{0:{1:{2}}}".format, 'abc', 's', '') |
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359 self.assertRaises(ValueError, "{0:{1:{2:{3:{4:{5:{6}}}}}}}".format, |
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360 0, 1, 2, 3, 4, 5, 6, 7) |
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361 |
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362 # string format spec errors |
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363 self.assertRaises(ValueError, "{0:-s}".format, '') |
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364 self.assertRaises(ValueError, format, "", "-") |
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365 self.assertRaises(ValueError, "{0:=s}".format, '') |
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366 |
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367 def test_buffer_is_readonly(self): |
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368 self.assertRaises(TypeError, sys.stdin.readinto, b"") |
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369 |
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370 |
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371 def test_main(): |
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372 test_support.run_unittest(StrTest) |
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373 |
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374 if __name__ == "__main__": |
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375 test_main() |