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1import copy
2import unittest
3from test.test_support import run_unittest, TestFailed, check_warnings
4
5
6# Fake a number that implements numeric methods through __coerce__
7class CoerceNumber:
8    def __init__(self, arg):
9        self.arg = arg
10
11    def __repr__(self):
12        return '<CoerceNumber %s>' % repr(self.arg)
13
14    def __coerce__(self, other):
15        if isinstance(other, CoerceNumber):
16            return self.arg, other.arg
17        else:
18            return (self.arg, other)
19
20# New-style class version of CoerceNumber
21class CoerceTo(object):
22    def __init__(self, arg):
23        self.arg = arg
24    def __coerce__(self, other):
25        if isinstance(other, CoerceTo):
26            return self.arg, other.arg
27        else:
28            return self.arg, other
29
30
31# Fake a number that implements numeric ops through methods.
32class MethodNumber:
33    def __init__(self,arg):
34        self.arg = arg
35
36    def __repr__(self):
37        return '<MethodNumber %s>' % repr(self.arg)
38
39    def __add__(self,other):
40        return self.arg + other
41
42    def __radd__(self,other):
43        return other + self.arg
44
45    def __sub__(self,other):
46        return self.arg - other
47
48    def __rsub__(self,other):
49        return other - self.arg
50
51    def __mul__(self,other):
52        return self.arg * other
53
54    def __rmul__(self,other):
55        return other * self.arg
56
57    def __div__(self,other):
58        return self.arg / other
59
60    def __rdiv__(self,other):
61        return other / self.arg
62
63    def __truediv__(self,other):
64        return self.arg / other
65
66    def __rtruediv__(self,other):
67        return other / self.arg
68
69    def __floordiv__(self,other):
70        return self.arg // other
71
72    def __rfloordiv__(self,other):
73        return other // self.arg
74
75    def __pow__(self,other):
76        return self.arg ** other
77
78    def __rpow__(self,other):
79        return other ** self.arg
80
81    def __mod__(self,other):
82        return self.arg % other
83
84    def __rmod__(self,other):
85        return other % self.arg
86
87    def __cmp__(self, other):
88        return cmp(self.arg, other)
89
90
91candidates = [2, 2L, 4.0, 2+0j, [1], (2,), None,
92              MethodNumber(2), CoerceNumber(2)]
93
94infix_binops = [ '+', '-', '*', '**', '%', '//', '/' ]
95
96TE = TypeError
97# b = both normal and augmented give same result list
98# s = single result lists for normal and augmented
99# e = equals other results
100# result lists: ['+', '-', '*', '**', '%', '//', ('classic /', 'new /')]
101#                                                ^^^^^^^^^^^^^^^^^^^^^^
102#                                               2-tuple if results differ
103#                                                 else only one value
104infix_results = {
105    # 2
106    (0,0): ('b', [4, 0, 4, 4, 0, 1, (1, 1.0)]),
107    (0,1): ('e', (0,0)),
108    (0,2): ('b', [6.0, -2.0, 8.0, 16.0, 2.0, 0.0, 0.5]),
109    (0,3): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
110    (0,4): ('b', [TE, TE, [1, 1], TE, TE, TE, TE]),
111    (0,5): ('b', [TE, TE, (2, 2), TE, TE, TE, TE]),
112    (0,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
113    (0,7): ('e', (0,0)),
114    (0,8): ('e', (0,0)),
115
116    # 2L
117    (1,0): ('e', (0,0)),
118    (1,1): ('e', (0,1)),
119    (1,2): ('e', (0,2)),
120    (1,3): ('e', (0,3)),
121    (1,4): ('e', (0,4)),
122    (1,5): ('e', (0,5)),
123    (1,6): ('e', (0,6)),
124    (1,7): ('e', (0,7)),
125    (1,8): ('e', (0,8)),
126
127    # 4.0
128    (2,0): ('b', [6.0, 2.0, 8.0, 16.0, 0.0, 2.0, 2.0]),
129    (2,1): ('e', (2,0)),
130    (2,2): ('b', [8.0, 0.0, 16.0, 256.0, 0.0, 1.0, 1.0]),
131    (2,3): ('b', [6+0j, 2+0j, 8+0j, 16+0j, 0+0j, 2+0j, 2+0j]),
132    (2,4): ('b', [TE, TE, TE, TE, TE, TE, TE]),
133    (2,5): ('e', (2,4)),
134    (2,6): ('e', (2,4)),
135    (2,7): ('e', (2,0)),
136    (2,8): ('e', (2,0)),
137
138    # (2+0j)
139    (3,0): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
140    (3,1): ('e', (3,0)),
141    (3,2): ('b', [6+0j, -2+0j, 8+0j, 16+0j, 2+0j, 0+0j, 0.5+0j]),
142    (3,3): ('b', [4+0j, 0+0j, 4+0j, 4+0j, 0+0j, 1+0j, 1+0j]),
143    (3,4): ('b', [TE, TE, TE, TE, TE, TE, TE]),
144    (3,5): ('e', (3,4)),
145    (3,6): ('e', (3,4)),
146    (3,7): ('e', (3,0)),
147    (3,8): ('e', (3,0)),
148
149    # [1]
150    (4,0): ('b', [TE, TE, [1, 1], TE, TE, TE, TE]),
151    (4,1): ('e', (4,0)),
152    (4,2): ('b', [TE, TE, TE, TE, TE, TE, TE]),
153    (4,3): ('b', [TE, TE, TE, TE, TE, TE, TE]),
154    (4,4): ('b', [[1, 1], TE, TE, TE, TE, TE, TE]),
155    (4,5): ('s', [TE, TE, TE, TE, TE, TE, TE], [[1, 2], TE, TE, TE, TE, TE, TE]),
156    (4,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
157    (4,7): ('e', (4,0)),
158    (4,8): ('e', (4,0)),
159
160    # (2,)
161    (5,0): ('b', [TE, TE, (2, 2), TE, TE, TE, TE]),
162    (5,1): ('e', (5,0)),
163    (5,2): ('b', [TE, TE, TE, TE, TE, TE, TE]),
164    (5,3): ('e', (5,2)),
165    (5,4): ('e', (5,2)),
166    (5,5): ('b', [(2, 2), TE, TE, TE, TE, TE, TE]),
167    (5,6): ('b', [TE, TE, TE, TE, TE, TE, TE]),
168    (5,7): ('e', (5,0)),
169    (5,8): ('e', (5,0)),
170
171    # None
172    (6,0): ('b', [TE, TE, TE, TE, TE, TE, TE]),
173    (6,1): ('e', (6,0)),
174    (6,2): ('e', (6,0)),
175    (6,3): ('e', (6,0)),
176    (6,4): ('e', (6,0)),
177    (6,5): ('e', (6,0)),
178    (6,6): ('e', (6,0)),
179    (6,7): ('e', (6,0)),
180    (6,8): ('e', (6,0)),
181
182    # MethodNumber(2)
183    (7,0): ('e', (0,0)),
184    (7,1): ('e', (0,1)),
185    (7,2): ('e', (0,2)),
186    (7,3): ('e', (0,3)),
187    (7,4): ('e', (0,4)),
188    (7,5): ('e', (0,5)),
189    (7,6): ('e', (0,6)),
190    (7,7): ('e', (0,7)),
191    (7,8): ('e', (0,8)),
192
193    # CoerceNumber(2)
194    (8,0): ('e', (0,0)),
195    (8,1): ('e', (0,1)),
196    (8,2): ('e', (0,2)),
197    (8,3): ('e', (0,3)),
198    (8,4): ('e', (0,4)),
199    (8,5): ('e', (0,5)),
200    (8,6): ('e', (0,6)),
201    (8,7): ('e', (0,7)),
202    (8,8): ('e', (0,8)),
203}
204
205def process_infix_results():
206    for key in sorted(infix_results):
207        val = infix_results[key]
208        if val[0] == 'e':
209            infix_results[key] = infix_results[val[1]]
210        else:
211            if val[0] == 's':
212                res = (val[1], val[2])
213            elif val[0] == 'b':
214                res = (val[1], val[1])
215            for i in range(1):
216                if isinstance(res[i][6], tuple):
217                    if 1/2 == 0:
218                        # testing with classic (floor) division
219                        res[i][6] = res[i][6][0]
220                    else:
221                        # testing with -Qnew
222                        res[i][6] = res[i][6][1]
223            infix_results[key] = res
224
225
226with check_warnings(("classic (int|long) division", DeprecationWarning),
227                    quiet=True):
228    process_infix_results()
229    # now infix_results has two lists of results for every pairing.
230
231prefix_binops = [ 'divmod' ]
232prefix_results = [
233    [(1,0), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1,0)],
234    [(1L,0L), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1L,0L)],
235    [(2.0,0.0), (2.0,0.0), (1.0,0.0), ((2+0j),0j), TE, TE, TE, TE, (2.0,0.0)],
236    [((1+0j),0j), ((1+0j),0j), (0j,(2+0j)), ((1+0j),0j), TE, TE, TE, TE, ((1+0j),0j)],
237    [TE, TE, TE, TE, TE, TE, TE, TE, TE],
238    [TE, TE, TE, TE, TE, TE, TE, TE, TE],
239    [TE, TE, TE, TE, TE, TE, TE, TE, TE],
240    [TE, TE, TE, TE, TE, TE, TE, TE, TE],
241    [(1,0), (1L,0L), (0.0,2.0), ((1+0j),0j), TE, TE, TE, TE, (1,0)]
242]
243
244def format_float(value):
245    if abs(value) < 0.01:
246        return '0.0'
247    else:
248        return '%.1f' % value
249
250# avoid testing platform fp quirks
251def format_result(value):
252    if isinstance(value, complex):
253        return '(%s + %sj)' % (format_float(value.real),
254                               format_float(value.imag))
255    elif isinstance(value, float):
256        return format_float(value)
257    return str(value)
258
259class CoercionTest(unittest.TestCase):
260    def test_infix_binops(self):
261        for ia, a in enumerate(candidates):
262            for ib, b in enumerate(candidates):
263                results = infix_results[(ia, ib)]
264                for op, res, ires in zip(infix_binops, results[0], results[1]):
265                    if res is TE:
266                        self.assertRaises(TypeError, eval,
267                                          'a %s b' % op, {'a': a, 'b': b})
268                    else:
269                        self.assertEqual(format_result(res),
270                                         format_result(eval('a %s b' % op)),
271                                         '%s %s %s == %s failed' % (a, op, b, res))
272                    try:
273                        z = copy.copy(a)
274                    except copy.Error:
275                        z = a # assume it has no inplace ops
276                    if ires is TE:
277                        try:
278                            exec 'z %s= b' % op
279                        except TypeError:
280                            pass
281                        else:
282                            self.fail("TypeError not raised")
283                    else:
284                        exec('z %s= b' % op)
285                        self.assertEqual(ires, z)
286
287    def test_prefix_binops(self):
288        for ia, a in enumerate(candidates):
289            for ib, b in enumerate(candidates):
290                for op in prefix_binops:
291                    res = prefix_results[ia][ib]
292                    if res is TE:
293                        self.assertRaises(TypeError, eval,
294                                          '%s(a, b)' % op, {'a': a, 'b': b})
295                    else:
296                        self.assertEqual(format_result(res),
297                                         format_result(eval('%s(a, b)' % op)),
298                                         '%s(%s, %s) == %s failed' % (op, a, b, res))
299
300    def test_cmptypes(self):
301        # Built-in tp_compare slots expect their arguments to have the
302        # same type, but a user-defined __coerce__ doesn't have to obey.
303        # SF #980352
304        evil_coercer = CoerceTo(42)
305        # Make sure these don't crash any more
306        self.assertNotEqual(cmp(u'fish', evil_coercer), 0)
307        self.assertNotEqual(cmp(slice(1), evil_coercer), 0)
308        # ...but that this still works
309        class WackyComparer(object):
310            def __cmp__(slf, other):
311                self.assertTrue(other == 42, 'expected evil_coercer, got %r' % other)
312                return 0
313            __hash__ = None # Invalid cmp makes this unhashable
314        self.assertEqual(cmp(WackyComparer(), evil_coercer), 0)
315        # ...and classic classes too, since that code path is a little different
316        class ClassicWackyComparer:
317            def __cmp__(slf, other):
318                self.assertTrue(other == 42, 'expected evil_coercer, got %r' % other)
319                return 0
320        self.assertEqual(cmp(ClassicWackyComparer(), evil_coercer), 0)
321
322    def test_infinite_rec_classic_classes(self):
323        # if __coerce__() returns its arguments reversed it causes an infinite
324        # recursion for classic classes.
325        class Tester:
326            def __coerce__(self, other):
327                return other, self
328
329        exc = TestFailed("__coerce__() returning its arguments reverse "
330                                "should raise RuntimeError")
331        try:
332            Tester() + 1
333        except (RuntimeError, TypeError):
334            return
335        except:
336            raise exc
337        else:
338            raise exc
339
340def test_main():
341    with check_warnings(("complex divmod.., // and % are deprecated",
342                         DeprecationWarning),
343                        ("classic (int|long) division", DeprecationWarning),
344                        quiet=True):
345        run_unittest(CoercionTest)
346
347if __name__ == "__main__":
348    test_main()
349