| 1 | import copy
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| 2 | import unittest
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| 3 | from test.test_support import run_unittest, TestFailed, check_warnings
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| 4 |
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| 5 |
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| 6 | # Fake a number that implements numeric methods through __coerce__
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| 7 | class CoerceNumber:
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| 8 | def __init__(self, arg):
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| 9 | self.arg = arg
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| 10 |
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| 11 | def __repr__(self):
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| 12 | return '<CoerceNumber %s>' % repr(self.arg)
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| 13 |
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| 14 | def __coerce__(self, other):
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| 15 | if isinstance(other, CoerceNumber):
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| 16 | return self.arg, other.arg
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| 17 | else:
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| 18 | return (self.arg, other)
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| 19 |
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| 20 | # New-style class version of CoerceNumber
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| 21 | class CoerceTo(object):
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| 22 | def __init__(self, arg):
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| 23 | self.arg = arg
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| 24 | def __coerce__(self, other):
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| 25 | if isinstance(other, CoerceTo):
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| 26 | return self.arg, other.arg
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| 27 | else:
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| 28 | return self.arg, other
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| 29 |
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| 30 |
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| 31 | # Fake a number that implements numeric ops through methods.
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| 32 | class MethodNumber:
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| 33 | def __init__(self,arg):
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| 34 | self.arg = arg
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| 35 |
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| 36 | def __repr__(self):
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| 37 | return '<MethodNumber %s>' % repr(self.arg)
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| 38 |
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| 39 | def __add__(self,other):
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| 40 | return self.arg + other
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| 41 |
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| 42 | def __radd__(self,other):
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| 43 | return other + self.arg
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| 44 |
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| 45 | def __sub__(self,other):
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| 46 | return self.arg - other
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| 47 |
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| 48 | def __rsub__(self,other):
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| 49 | return other - self.arg
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| 50 |
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| 51 | def __mul__(self,other):
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| 52 | return self.arg * other
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| 53 |
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| 54 | def __rmul__(self,other):
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| 55 | return other * self.arg
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| 56 |
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| 57 | def __div__(self,other):
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| 58 | return self.arg / other
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| 59 |
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| 60 | def __rdiv__(self,other):
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| 61 | return other / self.arg
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| 62 |
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| 63 | def __truediv__(self,other):
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| 64 | return self.arg / other
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| 65 |
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| 66 | def __rtruediv__(self,other):
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| 67 | return other / self.arg
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| 68 |
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| 69 | def __floordiv__(self,other):
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| 70 | return self.arg // other
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| 71 |
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| 72 | def __rfloordiv__(self,other):
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| 73 | return other // self.arg
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| 74 |
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| 75 | def __pow__(self,other):
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| 76 | return self.arg ** other
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| 77 |
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| 78 | def __rpow__(self,other):
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| 79 | return other ** self.arg
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| 80 |
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| 81 | def __mod__(self,other):
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| 82 | return self.arg % other
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| 83 |
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| 84 | def __rmod__(self,other):
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| 85 | return other % self.arg
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| 86 |
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| 87 | def __cmp__(self, other):
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| 88 | return cmp(self.arg, other)
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| 89 |
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| 90 |
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| 91 | candidates = [2, 2L, 4.0, 2+0j, [1], (2,), None,
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| 92 | MethodNumber(2), CoerceNumber(2)]
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| 93 |
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| 94 | infix_binops = [ '+', '-', '*', '**', '%', '//', '/' ]
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| 95 |
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| 96 | TE = TypeError
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| 97 | # b = both normal and augmented give same result list
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| 98 | # s = single result lists for normal and augmented
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| 99 | # e = equals other results
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| 100 | # result lists: ['+', '-', '*', '**', '%', '//', ('classic /', 'new /')]
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| 101 | # ^^^^^^^^^^^^^^^^^^^^^^
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| 102 | # 2-tuple if results differ
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| 103 | # else only one value
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| 104 | infix_results = {
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| 105 | # 2
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| 106 | (0,0): ('b', [4, 0, 4, 4, 0, 1, (1, 1.0)]),
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| 107 | (0,1): ('e', (0,0)),
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| 108 | (0,2): ('b', [6.0, -2.0, 8.0, 16.0, 2.0, 0.0, 0.5]),
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| 109 | (0,3): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
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| 110 | (0,4): ('b', [TE, TE, [1, 1], TE, TE, TE, TE]),
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| 111 | (0,5): ('b', [TE, TE, (2, 2), TE, TE, TE, TE]),
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| 112 | (0,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 113 | (0,7): ('e', (0,0)),
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| 114 | (0,8): ('e', (0,0)),
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| 115 |
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| 116 | # 2L
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| 117 | (1,0): ('e', (0,0)),
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| 118 | (1,1): ('e', (0,1)),
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| 119 | (1,2): ('e', (0,2)),
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| 120 | (1,3): ('e', (0,3)),
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| 121 | (1,4): ('e', (0,4)),
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| 122 | (1,5): ('e', (0,5)),
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| 123 | (1,6): ('e', (0,6)),
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| 124 | (1,7): ('e', (0,7)),
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| 125 | (1,8): ('e', (0,8)),
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| 126 |
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| 127 | # 4.0
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| 128 | (2,0): ('b', [6.0, 2.0, 8.0, 16.0, 0.0, 2.0, 2.0]),
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| 129 | (2,1): ('e', (2,0)),
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| 130 | (2,2): ('b', [8.0, 0.0, 16.0, 256.0, 0.0, 1.0, 1.0]),
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| 131 | (2,3): ('b', [6+0j, 2+0j, 8+0j, 16+0j, 0+0j, 2+0j, 2+0j]),
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| 132 | (2,4): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 133 | (2,5): ('e', (2,4)),
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| 134 | (2,6): ('e', (2,4)),
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| 135 | (2,7): ('e', (2,0)),
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| 136 | (2,8): ('e', (2,0)),
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| 137 |
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| 138 | # (2+0j)
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| 139 | (3,0): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
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| 140 | (3,1): ('e', (3,0)),
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| 141 | (3,2): ('b', [6+0j, -2+0j, 8+0j, 16+0j, 2+0j, 0+0j, 0.5+0j]),
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| 142 | (3,3): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
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| 143 | (3,4): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 144 | (3,5): ('e', (3,4)),
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| 145 | (3,6): ('e', (3,4)),
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| 146 | (3,7): ('e', (3,0)),
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| 147 | (3,8): ('e', (3,0)),
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| 148 |
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| 149 | # [1]
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| 150 | (4,0): ('b', [TE, TE, [1, 1], TE, TE, TE, TE]),
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| 151 | (4,1): ('e', (4,0)),
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| 152 | (4,2): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 153 | (4,3): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 154 | (4,4): ('b', [[1, 1], TE, TE, TE, TE, TE, TE]),
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| 155 | (4,5): ('s', [TE, TE, TE, TE, TE, TE, TE], [[1, 2], TE, TE, TE, TE, TE, TE]),
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| 156 | (4,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 157 | (4,7): ('e', (4,0)),
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| 158 | (4,8): ('e', (4,0)),
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| 159 |
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| 160 | # (2,)
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| 161 | (5,0): ('b', [TE, TE, (2, 2), TE, TE, TE, TE]),
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| 162 | (5,1): ('e', (5,0)),
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| 163 | (5,2): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 164 | (5,3): ('e', (5,2)),
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| 165 | (5,4): ('e', (5,2)),
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| 166 | (5,5): ('b', [(2, 2), TE, TE, TE, TE, TE, TE]),
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| 167 | (5,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 168 | (5,7): ('e', (5,0)),
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| 169 | (5,8): ('e', (5,0)),
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| 170 |
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| 171 | # None
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| 172 | (6,0): ('b', [TE, TE, TE, TE, TE, TE, TE]),
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| 173 | (6,1): ('e', (6,0)),
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| 174 | (6,2): ('e', (6,0)),
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| 175 | (6,3): ('e', (6,0)),
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| 176 | (6,4): ('e', (6,0)),
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| 177 | (6,5): ('e', (6,0)),
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| 178 | (6,6): ('e', (6,0)),
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| 179 | (6,7): ('e', (6,0)),
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| 180 | (6,8): ('e', (6,0)),
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| 181 |
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| 182 | # MethodNumber(2)
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| 183 | (7,0): ('e', (0,0)),
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| 184 | (7,1): ('e', (0,1)),
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| 185 | (7,2): ('e', (0,2)),
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| 186 | (7,3): ('e', (0,3)),
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| 187 | (7,4): ('e', (0,4)),
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| 188 | (7,5): ('e', (0,5)),
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| 189 | (7,6): ('e', (0,6)),
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| 190 | (7,7): ('e', (0,7)),
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| 191 | (7,8): ('e', (0,8)),
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| 192 |
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| 193 | # CoerceNumber(2)
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| 194 | (8,0): ('e', (0,0)),
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| 195 | (8,1): ('e', (0,1)),
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| 196 | (8,2): ('e', (0,2)),
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| 197 | (8,3): ('e', (0,3)),
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| 198 | (8,4): ('e', (0,4)),
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| 199 | (8,5): ('e', (0,5)),
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| 200 | (8,6): ('e', (0,6)),
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| 201 | (8,7): ('e', (0,7)),
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| 202 | (8,8): ('e', (0,8)),
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| 203 | }
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| 204 |
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| 205 | def process_infix_results():
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| 206 | for key in sorted(infix_results):
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| 207 | val = infix_results[key]
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| 208 | if val[0] == 'e':
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| 209 | infix_results[key] = infix_results[val[1]]
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| 210 | else:
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| 211 | if val[0] == 's':
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| 212 | res = (val[1], val[2])
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| 213 | elif val[0] == 'b':
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| 214 | res = (val[1], val[1])
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| 215 | for i in range(1):
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| 216 | if isinstance(res[i][6], tuple):
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| 217 | if 1/2 == 0:
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| 218 | # testing with classic (floor) division
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| 219 | res[i][6] = res[i][6][0]
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| 220 | else:
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| 221 | # testing with -Qnew
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| 222 | res[i][6] = res[i][6][1]
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| 223 | infix_results[key] = res
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| 224 |
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| 225 |
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| 226 | with check_warnings(("classic (int|long) division", DeprecationWarning),
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| 227 | quiet=True):
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| 228 | process_infix_results()
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| 229 | # now infix_results has two lists of results for every pairing.
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| 230 |
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| 231 | prefix_binops = [ 'divmod' ]
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| 232 | prefix_results = [
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| 233 | [(1,0), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1,0)],
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| 234 | [(1L,0L), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1L,0L)],
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| 235 | [(2.0,0.0), (2.0,0.0), (1.0,0.0), ((2+0j),0j), TE, TE, TE, TE, (2.0,0.0)],
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| 236 | [((1+0j),0j), ((1+0j),0j), (0j,(2+0j)), ((1+0j),0j), TE, TE, TE, TE, ((1+0j),0j)],
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| 237 | [TE, TE, TE, TE, TE, TE, TE, TE, TE],
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| 238 | [TE, TE, TE, TE, TE, TE, TE, TE, TE],
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| 239 | [TE, TE, TE, TE, TE, TE, TE, TE, TE],
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| 240 | [TE, TE, TE, TE, TE, TE, TE, TE, TE],
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| 241 | [(1,0), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1,0)]
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| 242 | ]
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| 243 |
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| 244 | def format_float(value):
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| 245 | if abs(value) < 0.01:
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| 246 | return '0.0'
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| 247 | else:
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| 248 | return '%.1f' % value
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| 249 |
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| 250 | # avoid testing platform fp quirks
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| 251 | def format_result(value):
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| 252 | if isinstance(value, complex):
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| 253 | return '(%s + %sj)' % (format_float(value.real),
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| 254 | format_float(value.imag))
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| 255 | elif isinstance(value, float):
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| 256 | return format_float(value)
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| 257 | return str(value)
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| 258 |
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| 259 | class CoercionTest(unittest.TestCase):
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| 260 | def test_infix_binops(self):
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| 261 | for ia, a in enumerate(candidates):
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| 262 | for ib, b in enumerate(candidates):
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| 263 | results = infix_results[(ia, ib)]
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| 264 | for op, res, ires in zip(infix_binops, results[0], results[1]):
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| 265 | if res is TE:
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| 266 | self.assertRaises(TypeError, eval,
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| 267 | 'a %s b' % op, {'a': a, 'b': b})
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| 268 | else:
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| 269 | self.assertEqual(format_result(res),
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| 270 | format_result(eval('a %s b' % op)),
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| 271 | '%s %s %s == %s failed' % (a, op, b, res))
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| 272 | try:
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| 273 | z = copy.copy(a)
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| 274 | except copy.Error:
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| 275 | z = a # assume it has no inplace ops
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| 276 | if ires is TE:
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| 277 | try:
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| 278 | exec 'z %s= b' % op
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| 279 | except TypeError:
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| 280 | pass
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| 281 | else:
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| 282 | self.fail("TypeError not raised")
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| 283 | else:
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| 284 | exec('z %s= b' % op)
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| 285 | self.assertEqual(ires, z)
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| 286 |
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| 287 | def test_prefix_binops(self):
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| 288 | for ia, a in enumerate(candidates):
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| 289 | for ib, b in enumerate(candidates):
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| 290 | for op in prefix_binops:
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| 291 | res = prefix_results[ia][ib]
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| 292 | if res is TE:
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| 293 | self.assertRaises(TypeError, eval,
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| 294 | '%s(a, b)' % op, {'a': a, 'b': b})
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| 295 | else:
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| 296 | self.assertEqual(format_result(res),
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| 297 | format_result(eval('%s(a, b)' % op)),
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| 298 | '%s(%s, %s) == %s failed' % (op, a, b, res))
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| 299 |
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| 300 | def test_cmptypes(self):
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| 301 | # Built-in tp_compare slots expect their arguments to have the
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| 302 | # same type, but a user-defined __coerce__ doesn't have to obey.
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| 303 | # SF #980352
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| 304 | evil_coercer = CoerceTo(42)
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| 305 | # Make sure these don't crash any more
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| 306 | self.assertNotEqual(cmp(u'fish', evil_coercer), 0)
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| 307 | self.assertNotEqual(cmp(slice(1), evil_coercer), 0)
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| 308 | # ...but that this still works
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| 309 | class WackyComparer(object):
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| 310 | def __cmp__(slf, other):
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| 311 | self.assertTrue(other == 42, 'expected evil_coercer, got %r' % other)
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| 312 | return 0
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| 313 | __hash__ = None # Invalid cmp makes this unhashable
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| 314 | self.assertEqual(cmp(WackyComparer(), evil_coercer), 0)
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| 315 | # ...and classic classes too, since that code path is a little different
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| 316 | class ClassicWackyComparer:
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| 317 | def __cmp__(slf, other):
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| 318 | self.assertTrue(other == 42, 'expected evil_coercer, got %r' % other)
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| 319 | return 0
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| 320 | self.assertEqual(cmp(ClassicWackyComparer(), evil_coercer), 0)
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| 321 |
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| 322 | def test_infinite_rec_classic_classes(self):
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| 323 | # if __coerce__() returns its arguments reversed it causes an infinite
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| 324 | # recursion for classic classes.
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| 325 | class Tester:
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| 326 | def __coerce__(self, other):
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| 327 | return other, self
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| 328 |
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| 329 | exc = TestFailed("__coerce__() returning its arguments reverse "
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| 330 | "should raise RuntimeError")
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| 331 | try:
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| 332 | Tester() + 1
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| 333 | except (RuntimeError, TypeError):
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| 334 | return
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| 335 | except:
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| 336 | raise exc
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| 337 | else:
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| 338 | raise exc
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| 339 |
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| 340 | def test_main():
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| 341 | with check_warnings(("complex divmod.., // and % are deprecated",
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| 342 | DeprecationWarning),
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| 343 | ("classic (int|long) division", DeprecationWarning),
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| 344 | quiet=True):
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| 345 | run_unittest(CoercionTest)
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| 346 |
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| 347 | if __name__ == "__main__":
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| 348 | test_main()
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