Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_slice.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents b36cb4602e21
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
24319
c43466f7dae8 A few days ago, Guido said (in the thread "[Python-Dev] Python
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1 # tests for slice objects; in particular the indices method.
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2
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3 import unittest
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4 from test import test_support
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5 from cPickle import loads, dumps
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6
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7 import sys
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8
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9 class SliceTest(unittest.TestCase):
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10
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11 def test_constructor(self):
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12 self.assertRaises(TypeError, slice)
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13 self.assertRaises(TypeError, slice, 1, 2, 3, 4)
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14
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15 def test_repr(self):
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16 self.assertEqual(repr(slice(1, 2, 3)), "slice(1, 2, 3)")
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17
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18 def test_hash(self):
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19 # Verify clearing of SF bug #800796
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20 self.assertRaises(TypeError, hash, slice(5))
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21 self.assertRaises(TypeError, slice(5).__hash__)
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22
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23 def test_cmp(self):
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24 s1 = slice(1, 2, 3)
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25 s2 = slice(1, 2, 3)
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26 s3 = slice(1, 2, 4)
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27 self.assertEqual(s1, s2)
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28 self.assertNotEqual(s1, s3)
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29
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30 class Exc(Exception):
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31 pass
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32
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33 class BadCmp(object):
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34 def __eq__(self, other):
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35 raise Exc
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36 __hash__ = None # Silence Py3k warning
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37
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38 s1 = slice(BadCmp())
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39 s2 = slice(BadCmp())
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40 self.assertRaises(Exc, cmp, s1, s2)
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41 self.assertEqual(s1, s1)
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42
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43 s1 = slice(1, BadCmp())
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44 s2 = slice(1, BadCmp())
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45 self.assertEqual(s1, s1)
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46 self.assertRaises(Exc, cmp, s1, s2)
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47
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48 s1 = slice(1, 2, BadCmp())
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49 s2 = slice(1, 2, BadCmp())
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50 self.assertEqual(s1, s1)
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51 self.assertRaises(Exc, cmp, s1, s2)
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52
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53 def test_members(self):
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54 s = slice(1)
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55 self.assertEqual(s.start, None)
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56 self.assertEqual(s.stop, 1)
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57 self.assertEqual(s.step, None)
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58
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59 s = slice(1, 2)
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60 self.assertEqual(s.start, 1)
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61 self.assertEqual(s.stop, 2)
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62 self.assertEqual(s.step, None)
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63
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64 s = slice(1, 2, 3)
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65 self.assertEqual(s.start, 1)
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66 self.assertEqual(s.stop, 2)
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67 self.assertEqual(s.step, 3)
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68
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69 class AnyClass:
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70 pass
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71
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72 obj = AnyClass()
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73 s = slice(obj)
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74 self.assertTrue(s.stop is obj)
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75
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76 def test_indices(self):
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77 self.assertEqual(slice(None ).indices(10), (0, 10, 1))
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78 self.assertEqual(slice(None, None, 2).indices(10), (0, 10, 2))
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79 self.assertEqual(slice(1, None, 2).indices(10), (1, 10, 2))
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80 self.assertEqual(slice(None, None, -1).indices(10), (9, -1, -1))
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81 self.assertEqual(slice(None, None, -2).indices(10), (9, -1, -2))
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82 self.assertEqual(slice(3, None, -2).indices(10), (3, -1, -2))
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83 # issue 3004 tests
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84 self.assertEqual(slice(None, -9).indices(10), (0, 1, 1))
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85 self.assertEqual(slice(None, -10).indices(10), (0, 0, 1))
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86 self.assertEqual(slice(None, -11).indices(10), (0, 0, 1))
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87 self.assertEqual(slice(None, -10, -1).indices(10), (9, 0, -1))
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88 self.assertEqual(slice(None, -11, -1).indices(10), (9, -1, -1))
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89 self.assertEqual(slice(None, -12, -1).indices(10), (9, -1, -1))
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90 self.assertEqual(slice(None, 9).indices(10), (0, 9, 1))
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91 self.assertEqual(slice(None, 10).indices(10), (0, 10, 1))
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92 self.assertEqual(slice(None, 11).indices(10), (0, 10, 1))
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93 self.assertEqual(slice(None, 8, -1).indices(10), (9, 8, -1))
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94 self.assertEqual(slice(None, 9, -1).indices(10), (9, 9, -1))
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95 self.assertEqual(slice(None, 10, -1).indices(10), (9, 9, -1))
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96
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97 self.assertEqual(
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98 slice(-100, 100 ).indices(10),
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99 slice(None).indices(10)
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100 )
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101 self.assertEqual(
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102 slice(100, -100, -1).indices(10),
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103 slice(None, None, -1).indices(10)
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104 )
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105 self.assertEqual(slice(-100L, 100L, 2L).indices(10), (0, 10, 2))
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106
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107 self.assertEqual(range(10)[::sys.maxint - 1], [0])
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108
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109 self.assertRaises(OverflowError, slice(None).indices, 1L<<100)
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110
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111 def test_setslice_without_getslice(self):
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112 tmp = []
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113 class X(object):
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114 def __setslice__(self, i, j, k):
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115 tmp.append((i, j, k))
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116
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117 x = X()
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118 with test_support.check_py3k_warnings():
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119 x[1:2] = 42
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120 self.assertEqual(tmp, [(1, 2, 42)])
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121
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122 def test_pickle(self):
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123 s = slice(10, 20, 3)
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124 for protocol in (0,1,2):
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125 t = loads(dumps(s, protocol))
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126 self.assertEqual(s, t)
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127 self.assertEqual(s.indices(15), t.indices(15))
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128 self.assertNotEqual(id(s), id(t))
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48254739159f A test case for the fix in #1674228.
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129
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130 def test_main():
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131 test_support.run_unittest(SliceTest)
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132
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133 if __name__ == "__main__":
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134 test_main()