Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_StringIO.py @ 49258:25f809123df6 legacy-trunk

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Issue #3925: Ignores shutil.rmtree error on cygwin too. Reviewed by Benjamin Peterson.
author Hirokazu Yamamoto <ocean-city@m2.ccsnet.ne.jp>
date Sun, 21 Sep 2008 20:48:41 +0000
parents 86fd39c2c676
children 6052751a04c8 6768b2350c57
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
14688
d6ffb6d7fe8a New test cases for the StringIO module
Martin v. Löwis <martin@v.loewis.de>
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1 # Tests StringIO and cStringIO
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2
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3 import unittest
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4 import StringIO
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5 import cStringIO
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6 import types
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7 from test import test_support
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8
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9
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10 class TestGenericStringIO(unittest.TestCase):
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11 # use a class variable MODULE to define which module is being tested
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12
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13 # Line of data to test as string
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14 _line = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!'
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15
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16 # Constructor to use for the test data (._line is passed to this
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17 # constructor)
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18 constructor = str
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19
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20 def setUp(self):
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21 self._line = self.constructor(self._line)
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22 self._lines = self.constructor((self._line + '\n') * 5)
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23 self._fp = self.MODULE.StringIO(self._lines)
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24
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25 def test_reads(self):
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26 eq = self.assertEqual
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27 self.assertRaises(TypeError, self._fp.seek)
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28 eq(self._fp.read(10), self._line[:10])
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29 eq(self._fp.readline(), self._line[10:] + '\n')
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30 eq(len(self._fp.readlines(60)), 2)
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31
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32 def test_writes(self):
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33 f = self.MODULE.StringIO()
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34 self.assertRaises(TypeError, f.seek)
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35 f.write(self._line[:6])
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36 f.seek(3)
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37 f.write(self._line[20:26])
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38 f.write(self._line[52])
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39 self.assertEqual(f.getvalue(), 'abcuvwxyz!')
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40
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41 def test_writelines(self):
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42 f = self.MODULE.StringIO()
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43 f.writelines([self._line[0], self._line[1], self._line[2]])
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44 f.seek(0)
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45 self.assertEqual(f.getvalue(), 'abc')
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46
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47 def test_writelines_error(self):
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48 def errorGen():
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49 yield 'a'
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50 raise KeyboardInterrupt()
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51 f = self.MODULE.StringIO()
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52 self.assertRaises(KeyboardInterrupt, f.writelines, errorGen())
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53
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54 def test_truncate(self):
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55 eq = self.assertEqual
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56 f = self.MODULE.StringIO()
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57 f.write(self._lines)
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58 f.seek(10)
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59 f.truncate()
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60 eq(f.getvalue(), 'abcdefghij')
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61 f.truncate(5)
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62 eq(f.getvalue(), 'abcde')
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63 f.write('xyz')
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64 eq(f.getvalue(), 'abcdexyz')
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65 self.assertRaises(IOError, f.truncate, -1)
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66 f.close()
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67 self.assertRaises(ValueError, f.write, 'frobnitz')
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68
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69 def test_closed_flag(self):
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70 f = self.MODULE.StringIO()
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71 self.assertEqual(f.closed, False)
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72 f.close()
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73 self.assertEqual(f.closed, True)
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74 f = self.MODULE.StringIO("abc")
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75 self.assertEqual(f.closed, False)
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76 f.close()
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77 self.assertEqual(f.closed, True)
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78
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79 def test_isatty(self):
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80 f = self.MODULE.StringIO()
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81 self.assertRaises(TypeError, f.isatty, None)
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82 self.assertEqual(f.isatty(), False)
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83 f.close()
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84 self.assertRaises(ValueError, f.isatty)
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85
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86 def test_iterator(self):
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87 eq = self.assertEqual
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88 unless = self.failUnless
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89 eq(iter(self._fp), self._fp)
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90 # Does this object support the iteration protocol?
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91 unless(hasattr(self._fp, '__iter__'))
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92 unless(hasattr(self._fp, 'next'))
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93 i = 0
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94 for line in self._fp:
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95 eq(line, self._line + '\n')
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96 i += 1
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97 eq(i, 5)
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98 self._fp.close()
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99 self.assertRaises(ValueError, self._fp.next)
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100
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101 class TestStringIO(TestGenericStringIO):
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102 MODULE = StringIO
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103
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104 def test_unicode(self):
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105
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106 if not test_support.have_unicode: return
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107
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108 # The StringIO module also supports concatenating Unicode
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109 # snippets to larger Unicode strings. This is tested by this
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110 # method. Note that cStringIO does not support this extension.
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111
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112 f = self.MODULE.StringIO()
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113 f.write(self._line[:6])
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114 f.seek(3)
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115 f.write(unicode(self._line[20:26]))
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116 f.write(unicode(self._line[52]))
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117 s = f.getvalue()
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118 self.assertEqual(s, unicode('abcuvwxyz!'))
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119 self.assertEqual(type(s), types.UnicodeType)
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120
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121 class TestcStringIO(TestGenericStringIO):
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122 MODULE = cStringIO
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123
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124 import sys
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125 if sys.platform.startswith('java'):
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126 # Jython doesn't have a buffer object, so we just do a useless
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127 # fake of the buffer tests.
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128 buffer = str
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129
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130 class TestBufferStringIO(TestStringIO):
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131 constructor = buffer
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132
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133 class TestBuffercStringIO(TestcStringIO):
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134 constructor = buffer
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135
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136
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Barry Warsaw <barry@python.org>
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137 def test_main():
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Walter Dörwald <walter@livinglogic.de>
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138 test_support.run_unittest(
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139 TestStringIO,
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140 TestcStringIO,
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141 TestBufferStringIO,
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142 TestBuffercStringIO
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143 )
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144
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145 if __name__ == '__main__':
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146 test_main()