Mercurial > cpython-lru_cache-weakref

annotate Lib/test/seq_tests.py @ 70817:dd775b1561ba

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Fix markup.
author Georg Brandl <georg@python.org>
date Tue, 14 Jun 2011 21:09:55 +0200
parents 3c9232a684ae
children 5c1fcaf3cf1c
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1 """
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2 Tests common to tuple, list and UserList.UserList
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3 """
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4
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5 import unittest
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6 import sys
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7
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8 # Various iterables
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9 # This is used for checking the constructor (here and in test_deque.py)
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10 def iterfunc(seqn):
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11 'Regular generator'
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12 for i in seqn:
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13 yield i
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14
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15 class Sequence:
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16 'Sequence using __getitem__'
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17 def __init__(self, seqn):
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18 self.seqn = seqn
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19 def __getitem__(self, i):
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20 return self.seqn[i]
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21
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22 class IterFunc:
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23 'Sequence using iterator protocol'
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24 def __init__(self, seqn):
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25 self.seqn = seqn
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26 self.i = 0
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27 def __iter__(self):
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28 return self
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29 def __next__(self):
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30 if self.i >= len(self.seqn): raise StopIteration
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31 v = self.seqn[self.i]
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32 self.i += 1
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33 return v
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34
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35 class IterGen:
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36 'Sequence using iterator protocol defined with a generator'
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37 def __init__(self, seqn):
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38 self.seqn = seqn
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39 self.i = 0
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40 def __iter__(self):
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41 for val in self.seqn:
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42 yield val
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43
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44 class IterNextOnly:
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45 'Missing __getitem__ and __iter__'
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46 def __init__(self, seqn):
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47 self.seqn = seqn
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48 self.i = 0
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49 def __next__(self):
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50 if self.i >= len(self.seqn): raise StopIteration
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51 v = self.seqn[self.i]
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52 self.i += 1
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53 return v
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54
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55 class IterNoNext:
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56 'Iterator missing __next__()'
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57 def __init__(self, seqn):
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58 self.seqn = seqn
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59 self.i = 0
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60 def __iter__(self):
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61 return self
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62
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63 class IterGenExc:
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64 'Test propagation of exceptions'
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65 def __init__(self, seqn):
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66 self.seqn = seqn
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67 self.i = 0
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68 def __iter__(self):
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69 return self
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70 def __next__(self):
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71 3 // 0
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72
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73 class IterFuncStop:
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74 'Test immediate stop'
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75 def __init__(self, seqn):
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76 pass
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77 def __iter__(self):
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78 return self
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79 def __next__(self):
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80 raise StopIteration
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81
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82 from itertools import chain
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83 def itermulti(seqn):
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84 'Test multiple tiers of iterators'
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85 return chain(map(lambda x:x, iterfunc(IterGen(Sequence(seqn)))))
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86
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87 class CommonTest(unittest.TestCase):
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88 # The type to be tested
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89 type2test = None
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90
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91 def test_constructors(self):
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92 l0 = []
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93 l1 = [0]
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94 l2 = [0, 1]
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95
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96 u = self.type2test()
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97 u0 = self.type2test(l0)
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98 u1 = self.type2test(l1)
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99 u2 = self.type2test(l2)
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100
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101 uu = self.type2test(u)
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102 uu0 = self.type2test(u0)
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103 uu1 = self.type2test(u1)
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104 uu2 = self.type2test(u2)
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105
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106 v = self.type2test(tuple(u))
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107 class OtherSeq:
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108 def __init__(self, initseq):
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109 self.__data = initseq
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110 def __len__(self):
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111 return len(self.__data)
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112 def __getitem__(self, i):
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113 return self.__data[i]
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114 s = OtherSeq(u0)
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115 v0 = self.type2test(s)
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116 self.assertEqual(len(v0), len(s))
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117
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118 s = "this is also a sequence"
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119 vv = self.type2test(s)
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120 self.assertEqual(len(vv), len(s))
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121
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122 # Create from various iteratables
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123 for s in ("123", "", range(1000), ('do', 1.2), range(2000,2200,5)):
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124 for g in (Sequence, IterFunc, IterGen,
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125 itermulti, iterfunc):
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126 self.assertEqual(self.type2test(g(s)), self.type2test(s))
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127 self.assertEqual(self.type2test(IterFuncStop(s)), self.type2test())
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128 self.assertEqual(self.type2test(c for c in "123"), self.type2test("123"))
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129 self.assertRaises(TypeError, self.type2test, IterNextOnly(s))
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130 self.assertRaises(TypeError, self.type2test, IterNoNext(s))
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131 self.assertRaises(ZeroDivisionError, self.type2test, IterGenExc(s))
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132
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133 def test_truth(self):
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134 self.assertFalse(self.type2test())
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135 self.assertTrue(self.type2test([42]))
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136
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137 def test_getitem(self):
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138 u = self.type2test([0, 1, 2, 3, 4])
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139 for i in range(len(u)):
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140 self.assertEqual(u[i], i)
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141 self.assertEqual(u[int(i)], i)
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142 for i in range(-len(u), -1):
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143 self.assertEqual(u[i], len(u)+i)
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144 self.assertEqual(u[int(i)], len(u)+i)
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145 self.assertRaises(IndexError, u.__getitem__, -len(u)-1)
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146 self.assertRaises(IndexError, u.__getitem__, len(u))
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147 self.assertRaises(ValueError, u.__getitem__, slice(0,10,0))
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148
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149 u = self.type2test()
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150 self.assertRaises(IndexError, u.__getitem__, 0)
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151 self.assertRaises(IndexError, u.__getitem__, -1)
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152
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153 self.assertRaises(TypeError, u.__getitem__)
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154
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155 a = self.type2test([10, 11])
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156 self.assertEqual(a[0], 10)
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157 self.assertEqual(a[1], 11)
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158 self.assertEqual(a[-2], 10)
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159 self.assertEqual(a[-1], 11)
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160 self.assertRaises(IndexError, a.__getitem__, -3)
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161 self.assertRaises(IndexError, a.__getitem__, 3)
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162
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163 def test_getslice(self):
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164 l = [0, 1, 2, 3, 4]
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165 u = self.type2test(l)
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166
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167 self.assertEqual(u[0:0], self.type2test())
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168 self.assertEqual(u[1:2], self.type2test([1]))
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169 self.assertEqual(u[-2:-1], self.type2test([3]))
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170 self.assertEqual(u[-1000:1000], u)
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171 self.assertEqual(u[1000:-1000], self.type2test([]))
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172 self.assertEqual(u[:], u)
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173 self.assertEqual(u[1:None], self.type2test([1, 2, 3, 4]))
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174 self.assertEqual(u[None:3], self.type2test([0, 1, 2]))
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175
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176 # Extended slices
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177 self.assertEqual(u[::], u)
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178 self.assertEqual(u[::2], self.type2test([0, 2, 4]))
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179 self.assertEqual(u[1::2], self.type2test([1, 3]))
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180 self.assertEqual(u[::-1], self.type2test([4, 3, 2, 1, 0]))
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181 self.assertEqual(u[::-2], self.type2test([4, 2, 0]))
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182 self.assertEqual(u[3::-2], self.type2test([3, 1]))
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183 self.assertEqual(u[3:3:-2], self.type2test([]))
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184 self.assertEqual(u[3:2:-2], self.type2test([3]))
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185 self.assertEqual(u[3:1:-2], self.type2test([3]))
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186 self.assertEqual(u[3:0:-2], self.type2test([3, 1]))
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187 self.assertEqual(u[::-100], self.type2test([4]))
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188 self.assertEqual(u[100:-100:], self.type2test([]))
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189 self.assertEqual(u[-100:100:], u)
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190 self.assertEqual(u[100:-100:-1], u[::-1])
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191 self.assertEqual(u[-100:100:-1], self.type2test([]))
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192 self.assertEqual(u[-100:100:2], self.type2test([0, 2, 4]))
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193
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194 # Test extreme cases with long ints
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195 a = self.type2test([0,1,2,3,4])
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196 self.assertEqual(a[ -pow(2,128): 3 ], self.type2test([0,1,2]))
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197 self.assertEqual(a[ 3: pow(2,145) ], self.type2test([3,4]))
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198
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199 def test_contains(self):
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200 u = self.type2test([0, 1, 2])
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201 for i in u:
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202 self.assertIn(i, u)
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203 for i in min(u)-1, max(u)+1:
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204 self.assertNotIn(i, u)
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205
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206 self.assertRaises(TypeError, u.__contains__)
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207
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208 def test_contains_fake(self):
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209 class AllEq:
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210 # Sequences must use rich comparison against each item
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211 # (unless "is" is true, or an earlier item answered)
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212 # So instances of AllEq must be found in all non-empty sequences.
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213 def __eq__(self, other):
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214 return True
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215 __hash__ = None # Can't meet hash invariant requirements
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216 self.assertNotIn(AllEq(), self.type2test([]))
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217 self.assertIn(AllEq(), self.type2test([1]))
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218
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219 def test_contains_order(self):
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220 # Sequences must test in-order. If a rich comparison has side
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221 # effects, these will be visible to tests against later members.
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222 # In this test, the "side effect" is a short-circuiting raise.
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223 class DoNotTestEq(Exception):
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224 pass
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225 class StopCompares:
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226 def __eq__(self, other):
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227 raise DoNotTestEq
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228
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229 checkfirst = self.type2test([1, StopCompares()])
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230 self.assertIn(1, checkfirst)
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231 checklast = self.type2test([StopCompares(), 1])
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232 self.assertRaises(DoNotTestEq, checklast.__contains__, 1)
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233
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234 def test_len(self):
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235 self.assertEqual(len(self.type2test()), 0)
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236 self.assertEqual(len(self.type2test([])), 0)
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237 self.assertEqual(len(self.type2test([0])), 1)
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238 self.assertEqual(len(self.type2test([0, 1, 2])), 3)
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239
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240 def test_minmax(self):
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241 u = self.type2test([0, 1, 2])
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242 self.assertEqual(min(u), 0)
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243 self.assertEqual(max(u), 2)
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244
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245 def test_addmul(self):
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246 u1 = self.type2test([0])
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247 u2 = self.type2test([0, 1])
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248 self.assertEqual(u1, u1 + self.type2test())
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249 self.assertEqual(u1, self.type2test() + u1)
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250 self.assertEqual(u1 + self.type2test([1]), u2)
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251 self.assertEqual(self.type2test([-1]) + u1, self.type2test([-1, 0]))
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252 self.assertEqual(self.type2test(), u2*0)
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253 self.assertEqual(self.type2test(), 0*u2)
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254 self.assertEqual(self.type2test(), u2*0)
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255 self.assertEqual(self.type2test(), 0*u2)
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256 self.assertEqual(u2, u2*1)
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257 self.assertEqual(u2, 1*u2)
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258 self.assertEqual(u2, u2*1)
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259 self.assertEqual(u2, 1*u2)
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260 self.assertEqual(u2+u2, u2*2)
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261 self.assertEqual(u2+u2, 2*u2)
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262 self.assertEqual(u2+u2, u2*2)
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263 self.assertEqual(u2+u2, 2*u2)
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264 self.assertEqual(u2+u2+u2, u2*3)
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265 self.assertEqual(u2+u2+u2, 3*u2)
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266
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267 class subclass(self.type2test):
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268 pass
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269 u3 = subclass([0, 1])
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270 self.assertEqual(u3, u3*1)
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271 self.assertIsNot(u3, u3*1)
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272
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273 def test_iadd(self):
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274 u = self.type2test([0, 1])
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275 u += self.type2test()
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276 self.assertEqual(u, self.type2test([0, 1]))
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277 u += self.type2test([2, 3])
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278 self.assertEqual(u, self.type2test([0, 1, 2, 3]))
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279 u += self.type2test([4, 5])
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280 self.assertEqual(u, self.type2test([0, 1, 2, 3, 4, 5]))
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281
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282 u = self.type2test("spam")
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283 u += self.type2test("eggs")
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284 self.assertEqual(u, self.type2test("spameggs"))
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285
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286 def test_imul(self):
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287 u = self.type2test([0, 1])
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288 u *= 3
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289 self.assertEqual(u, self.type2test([0, 1, 0, 1, 0, 1]))
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290
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291 def test_getitemoverwriteiter(self):
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292 # Verify that __getitem__ overrides are not recognized by __iter__
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293 class T(self.type2test):
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294 def __getitem__(self, key):
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295 return str(key) + '!!!'
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296 self.assertEqual(next(iter(T((1,2)))), 1)
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297
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298 def test_repeat(self):
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299 for m in range(4):
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300 s = tuple(range(m))
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301 for n in range(-3, 5):
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302 self.assertEqual(self.type2test(s*n), self.type2test(s)*n)
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303 self.assertEqual(self.type2test(s)*(-4), self.type2test([]))
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304 self.assertEqual(id(s), id(s*1))
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305
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306 def test_bigrepeat(self):
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307 import sys
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308 if sys.maxsize <= 2147483647:
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309 x = self.type2test([0])
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310 x *= 2**16
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311 self.assertRaises(MemoryError, x.__mul__, 2**16)
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312 if hasattr(x, '__imul__'):
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313 self.assertRaises(MemoryError, x.__imul__, 2**16)
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314
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315 def test_subscript(self):
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316 a = self.type2test([10, 11])
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317 self.assertEqual(a.__getitem__(0), 10)
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318 self.assertEqual(a.__getitem__(1), 11)
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319 self.assertEqual(a.__getitem__(-2), 10)
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320 self.assertEqual(a.__getitem__(-1), 11)
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321 self.assertRaises(IndexError, a.__getitem__, -3)
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322 self.assertRaises(IndexError, a.__getitem__, 3)
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323 self.assertEqual(a.__getitem__(slice(0,1)), self.type2test([10]))
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324 self.assertEqual(a.__getitem__(slice(1,2)), self.type2test([11]))
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325 self.assertEqual(a.__getitem__(slice(0,2)), self.type2test([10, 11]))
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326 self.assertEqual(a.__getitem__(slice(0,3)), self.type2test([10, 11]))
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327 self.assertEqual(a.__getitem__(slice(3,5)), self.type2test([]))
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328 self.assertRaises(ValueError, a.__getitem__, slice(0, 10, 0))
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329 self.assertRaises(TypeError, a.__getitem__, 'x')
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330
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331 def test_count(self):
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332 a = self.type2test([0, 1, 2])*3
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333 self.assertEqual(a.count(0), 3)
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334 self.assertEqual(a.count(1), 3)
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335 self.assertEqual(a.count(3), 0)
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336
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337 self.assertRaises(TypeError, a.count)
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338
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339 class BadExc(Exception):
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340 pass
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341
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342 class BadCmp:
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343 def __eq__(self, other):
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344 if other == 2:
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345 raise BadExc()
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346 return False
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347
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348 self.assertRaises(BadExc, a.count, BadCmp())
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349
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350 def test_index(self):
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351 u = self.type2test([0, 1])
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352 self.assertEqual(u.index(0), 0)
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353 self.assertEqual(u.index(1), 1)
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354 self.assertRaises(ValueError, u.index, 2)
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355
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356 u = self.type2test([-2, -1, 0, 0, 1, 2])
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357 self.assertEqual(u.count(0), 2)
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358 self.assertEqual(u.index(0), 2)
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359 self.assertEqual(u.index(0, 2), 2)
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360 self.assertEqual(u.index(-2, -10), 0)
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361 self.assertEqual(u.index(0, 3), 3)
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362 self.assertEqual(u.index(0, 3, 4), 3)
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363 self.assertRaises(ValueError, u.index, 2, 0, -10)
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364
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365 self.assertRaises(TypeError, u.index)
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366
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367 class BadExc(Exception):
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368 pass
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369
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370 class BadCmp:
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371 def __eq__(self, other):
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372 if other == 2:
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373 raise BadExc()
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374 return False
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375
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376 a = self.type2test([0, 1, 2, 3])
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377 self.assertRaises(BadExc, a.index, BadCmp())
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378
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379 a = self.type2test([-2, -1, 0, 0, 1, 2])
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380 self.assertEqual(a.index(0), 2)
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381 self.assertEqual(a.index(0, 2), 2)
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382 self.assertEqual(a.index(0, -4), 2)
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383 self.assertEqual(a.index(-2, -10), 0)
063d022ac011 Issue 2025: Add index() and count() methods to tuple so that it will follow
Raymond Hettinger <python@rcn.com>
parents: 43877
diff changeset
384 self.assertEqual(a.index(0, 3), 3)
063d022ac011 Issue 2025: Add index() and count() methods to tuple so that it will follow
Raymond Hettinger <python@rcn.com>
parents: 43877
diff changeset
385 self.assertEqual(a.index(0, -3), 3)
063d022ac011 Issue 2025: Add index() and count() methods to tuple so that it will follow
Raymond Hettinger <python@rcn.com>
parents: 43877
diff changeset
386 self.assertEqual(a.index(0, 3, 4), 3)
063d022ac011 Issue 2025: Add index() and count() methods to tuple so that it will follow
Raymond Hettinger <python@rcn.com>
parents: 43877
diff changeset
387 self.assertEqual(a.index(0, -3, -2), 3)
063d022ac011 Issue 2025: Add index() and count() methods to tuple so that it will follow
Raymond Hettinger <python@rcn.com>
parents: 43877
diff changeset
388 self.assertEqual(a.index(0, -4*sys.maxsize, 4*sys.maxsize), 2)
063d022ac011 Issue 2025: Add index() and count() methods to tuple so that it will follow
Raymond Hettinger <python@rcn.com>
parents: 43877
diff changeset
389 self.assertRaises(ValueError, a.index, 0, 4*sys.maxsize,-4*sys.maxsize)
063d022ac011 Issue 2025: Add index() and count() methods to tuple so that it will follow
Raymond Hettinger <python@rcn.com>
parents: 43877
diff changeset
390 self.assertRaises(ValueError, a.index, 2, 0, -10)