Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_StringIO.py @ 32527:0da660e05e69 legacy-trunk

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"#if WITH_THREAD" is incorrect; must be #ifdef instead; WITH_THREAD isn't always set to an integer value when it's defined.
author Tim Peters <tim.peters@gmail.com>
date Wed, 07 Jul 2004 20:42:07 +0000
parents 06016d5d81d7
children db1bafa9b656
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 eq(self._fp.read(10), self._line[:10])
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28 eq(self._fp.readline(), self._line[10:] + '\n')
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29 eq(len(self._fp.readlines(60)), 2)
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30
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31 def test_writes(self):
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32 f = self.MODULE.StringIO()
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33 f.write(self._line[:6])
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34 f.seek(3)
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35 f.write(self._line[20:26])
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36 f.write(self._line[52])
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37 self.assertEqual(f.getvalue(), 'abcuvwxyz!')
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38
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39 def test_writelines(self):
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40 f = self.MODULE.StringIO()
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41 f.writelines([self._line[0], self._line[1], self._line[2]])
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42 f.seek(0)
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43 self.assertEqual(f.getvalue(), 'abc')
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44
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45 def test_truncate(self):
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46 eq = self.assertEqual
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47 f = self.MODULE.StringIO()
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48 f.write(self._lines)
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49 f.seek(10)
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50 f.truncate()
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51 eq(f.getvalue(), 'abcdefghij')
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52 f.seek(0)
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53 f.truncate(5)
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54 eq(f.getvalue(), 'abcde')
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55 f.close()
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56 self.assertRaises(ValueError, f.write, 'frobnitz')
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57
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58 def test_closed_flag(self):
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59 f = self.MODULE.StringIO()
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60 self.assertEqual(f.closed, False)
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61 f.close()
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62 self.assertEqual(f.closed, True)
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63 f = self.MODULE.StringIO("abc")
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64 self.assertEqual(f.closed, False)
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65 f.close()
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66 self.assertEqual(f.closed, True)
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67
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68 def test_iterator(self):
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69 eq = self.assertEqual
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70 unless = self.failUnless
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71 eq(iter(self._fp), self._fp)
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72 # Does this object support the iteration protocol?
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73 unless(hasattr(self._fp, '__iter__'))
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74 unless(hasattr(self._fp, 'next'))
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75 i = 0
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76 for line in self._fp:
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77 eq(line, self._line + '\n')
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78 i += 1
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79 eq(i, 5)
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80
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81 class TestStringIO(TestGenericStringIO):
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82 MODULE = StringIO
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83
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84 def test_unicode(self):
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85
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86 if not test_support.have_unicode: return
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87
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88 # The StringIO module also supports concatenating Unicode
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89 # snippets to larger Unicode strings. This is tested by this
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90 # method. Note that cStringIO does not support this extension.
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91
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92 f = self.MODULE.StringIO()
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93 f.write(self._line[:6])
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94 f.seek(3)
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95 f.write(unicode(self._line[20:26]))
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96 f.write(unicode(self._line[52]))
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97 s = f.getvalue()
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98 self.assertEqual(s, unicode('abcuvwxyz!'))
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99 self.assertEqual(type(s), types.UnicodeType)
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100
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101 class TestcStringIO(TestGenericStringIO):
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102 MODULE = cStringIO
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103
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104 import sys
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105 if sys.platform.startswith('java'):
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106 # Jython doesn't have a buffer object, so we just do a useless
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107 # fake of the buffer tests.
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108 buffer = str
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109
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110 class TestBufferStringIO(TestStringIO):
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111 constructor = buffer
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112
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113 class TestBuffercStringIO(TestcStringIO):
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114 constructor = buffer
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115
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116
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117 def test_main():
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118 test_support.run_unittest(
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119 TestStringIO,
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120 TestcStringIO,
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121 TestBufferStringIO,
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122 TestBuffercStringIO
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123 )
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124
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125 if __name__ == '__main__':
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126 test_main()