Nick Coghlan | f4cb48a | 2013-11-03 16:41:46 +1000 | [diff] [blame] | 1 | import abc |
Raymond Hettinger | af56e0e | 2016-12-16 13:57:40 -0800 | [diff] [blame] | 2 | import builtins |
Raymond Hettinger | 003be52 | 2011-05-03 11:01:32 -0700 | [diff] [blame] | 3 | import collections |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 4 | import collections.abc |
Serhiy Storchaka | 45120f2 | 2015-10-24 09:49:56 +0300 | [diff] [blame] | 5 | import copy |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 6 | from itertools import permutations |
Jack Diederich | e0cbd69 | 2009-04-01 04:27:09 +0000 | [diff] [blame] | 7 | import pickle |
Georg Brandl | 2e7346a | 2010-07-31 18:09:23 +0000 | [diff] [blame] | 8 | from random import choice |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 9 | import sys |
| 10 | from test import support |
Antoine Pitrou | a6a4dc8 | 2017-09-07 18:56:24 +0200 | [diff] [blame] | 11 | import threading |
Serhiy Storchaka | 6779652 | 2017-01-12 18:34:33 +0200 | [diff] [blame] | 12 | import time |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 13 | import unittest |
Raymond Hettinger | d191ef2 | 2017-01-07 20:44:48 -0800 | [diff] [blame] | 14 | import unittest.mock |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 15 | from weakref import proxy |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 16 | import contextlib |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 17 | |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 18 | import functools |
| 19 | |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 20 | py_functools = support.import_fresh_module('functools', blocked=['_functools']) |
| 21 | c_functools = support.import_fresh_module('functools', fresh=['_functools']) |
| 22 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 23 | decimal = support.import_fresh_module('decimal', fresh=['_decimal']) |
| 24 | |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 25 | @contextlib.contextmanager |
| 26 | def replaced_module(name, replacement): |
| 27 | original_module = sys.modules[name] |
| 28 | sys.modules[name] = replacement |
| 29 | try: |
| 30 | yield |
| 31 | finally: |
| 32 | sys.modules[name] = original_module |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 33 | |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 34 | def capture(*args, **kw): |
| 35 | """capture all positional and keyword arguments""" |
| 36 | return args, kw |
| 37 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 38 | |
Jack Diederich | e0cbd69 | 2009-04-01 04:27:09 +0000 | [diff] [blame] | 39 | def signature(part): |
| 40 | """ return the signature of a partial object """ |
| 41 | return (part.func, part.args, part.keywords, part.__dict__) |
Guido van Rossum | c1f779c | 2007-07-03 08:25:58 +0000 | [diff] [blame] | 42 | |
Serhiy Storchaka | 3874128 | 2016-02-02 18:45:17 +0200 | [diff] [blame] | 43 | class MyTuple(tuple): |
| 44 | pass |
| 45 | |
| 46 | class BadTuple(tuple): |
| 47 | def __add__(self, other): |
| 48 | return list(self) + list(other) |
| 49 | |
| 50 | class MyDict(dict): |
| 51 | pass |
| 52 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 53 | |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 54 | class TestPartial: |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 55 | |
| 56 | def test_basic_examples(self): |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 57 | p = self.partial(capture, 1, 2, a=10, b=20) |
| 58 | self.assertTrue(callable(p)) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 59 | self.assertEqual(p(3, 4, b=30, c=40), |
| 60 | ((1, 2, 3, 4), dict(a=10, b=30, c=40))) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 61 | p = self.partial(map, lambda x: x*10) |
Guido van Rossum | c1f779c | 2007-07-03 08:25:58 +0000 | [diff] [blame] | 62 | self.assertEqual(list(p([1,2,3,4])), [10, 20, 30, 40]) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 63 | |
| 64 | def test_attributes(self): |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 65 | p = self.partial(capture, 1, 2, a=10, b=20) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 66 | # attributes should be readable |
| 67 | self.assertEqual(p.func, capture) |
| 68 | self.assertEqual(p.args, (1, 2)) |
| 69 | self.assertEqual(p.keywords, dict(a=10, b=20)) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 70 | |
| 71 | def test_argument_checking(self): |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 72 | self.assertRaises(TypeError, self.partial) # need at least a func arg |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 73 | try: |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 74 | self.partial(2)() |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 75 | except TypeError: |
| 76 | pass |
| 77 | else: |
| 78 | self.fail('First arg not checked for callability') |
| 79 | |
| 80 | def test_protection_of_callers_dict_argument(self): |
| 81 | # a caller's dictionary should not be altered by partial |
| 82 | def func(a=10, b=20): |
| 83 | return a |
| 84 | d = {'a':3} |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 85 | p = self.partial(func, a=5) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 86 | self.assertEqual(p(**d), 3) |
| 87 | self.assertEqual(d, {'a':3}) |
| 88 | p(b=7) |
| 89 | self.assertEqual(d, {'a':3}) |
| 90 | |
Serhiy Storchaka | 9639e4a | 2017-02-20 14:04:30 +0200 | [diff] [blame] | 91 | def test_kwargs_copy(self): |
| 92 | # Issue #29532: Altering a kwarg dictionary passed to a constructor |
| 93 | # should not affect a partial object after creation |
| 94 | d = {'a': 3} |
| 95 | p = self.partial(capture, **d) |
| 96 | self.assertEqual(p(), ((), {'a': 3})) |
| 97 | d['a'] = 5 |
| 98 | self.assertEqual(p(), ((), {'a': 3})) |
| 99 | |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 100 | def test_arg_combinations(self): |
| 101 | # exercise special code paths for zero args in either partial |
| 102 | # object or the caller |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 103 | p = self.partial(capture) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 104 | self.assertEqual(p(), ((), {})) |
| 105 | self.assertEqual(p(1,2), ((1,2), {})) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 106 | p = self.partial(capture, 1, 2) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 107 | self.assertEqual(p(), ((1,2), {})) |
| 108 | self.assertEqual(p(3,4), ((1,2,3,4), {})) |
| 109 | |
| 110 | def test_kw_combinations(self): |
| 111 | # exercise special code paths for no keyword args in |
| 112 | # either the partial object or the caller |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 113 | p = self.partial(capture) |
Benjamin Peterson | 65bcdd7 | 2015-05-09 00:25:18 -0400 | [diff] [blame] | 114 | self.assertEqual(p.keywords, {}) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 115 | self.assertEqual(p(), ((), {})) |
| 116 | self.assertEqual(p(a=1), ((), {'a':1})) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 117 | p = self.partial(capture, a=1) |
Benjamin Peterson | 65bcdd7 | 2015-05-09 00:25:18 -0400 | [diff] [blame] | 118 | self.assertEqual(p.keywords, {'a':1}) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 119 | self.assertEqual(p(), ((), {'a':1})) |
| 120 | self.assertEqual(p(b=2), ((), {'a':1, 'b':2})) |
| 121 | # keyword args in the call override those in the partial object |
| 122 | self.assertEqual(p(a=3, b=2), ((), {'a':3, 'b':2})) |
| 123 | |
| 124 | def test_positional(self): |
| 125 | # make sure positional arguments are captured correctly |
| 126 | for args in [(), (0,), (0,1), (0,1,2), (0,1,2,3)]: |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 127 | p = self.partial(capture, *args) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 128 | expected = args + ('x',) |
| 129 | got, empty = p('x') |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 130 | self.assertTrue(expected == got and empty == {}) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 131 | |
| 132 | def test_keyword(self): |
| 133 | # make sure keyword arguments are captured correctly |
| 134 | for a in ['a', 0, None, 3.5]: |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 135 | p = self.partial(capture, a=a) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 136 | expected = {'a':a,'x':None} |
| 137 | empty, got = p(x=None) |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 138 | self.assertTrue(expected == got and empty == ()) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 139 | |
| 140 | def test_no_side_effects(self): |
| 141 | # make sure there are no side effects that affect subsequent calls |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 142 | p = self.partial(capture, 0, a=1) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 143 | args1, kw1 = p(1, b=2) |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 144 | self.assertTrue(args1 == (0,1) and kw1 == {'a':1,'b':2}) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 145 | args2, kw2 = p() |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 146 | self.assertTrue(args2 == (0,) and kw2 == {'a':1}) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 147 | |
| 148 | def test_error_propagation(self): |
| 149 | def f(x, y): |
| 150 | x / y |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 151 | self.assertRaises(ZeroDivisionError, self.partial(f, 1, 0)) |
| 152 | self.assertRaises(ZeroDivisionError, self.partial(f, 1), 0) |
| 153 | self.assertRaises(ZeroDivisionError, self.partial(f), 1, 0) |
| 154 | self.assertRaises(ZeroDivisionError, self.partial(f, y=0), 1) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 155 | |
Raymond Hettinger | c8b6d1b | 2005-03-08 06:14:50 +0000 | [diff] [blame] | 156 | def test_weakref(self): |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 157 | f = self.partial(int, base=16) |
Raymond Hettinger | c8b6d1b | 2005-03-08 06:14:50 +0000 | [diff] [blame] | 158 | p = proxy(f) |
| 159 | self.assertEqual(f.func, p.func) |
| 160 | f = None |
| 161 | self.assertRaises(ReferenceError, getattr, p, 'func') |
| 162 | |
Raymond Hettinger | 26e512a | 2005-03-11 06:48:49 +0000 | [diff] [blame] | 163 | def test_with_bound_and_unbound_methods(self): |
Guido van Rossum | c1f779c | 2007-07-03 08:25:58 +0000 | [diff] [blame] | 164 | data = list(map(str, range(10))) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 165 | join = self.partial(str.join, '') |
Raymond Hettinger | 26e512a | 2005-03-11 06:48:49 +0000 | [diff] [blame] | 166 | self.assertEqual(join(data), '0123456789') |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 167 | join = self.partial(''.join) |
Raymond Hettinger | 26e512a | 2005-03-11 06:48:49 +0000 | [diff] [blame] | 168 | self.assertEqual(join(data), '0123456789') |
Tim Peters | eba28be | 2005-03-28 01:08:02 +0000 | [diff] [blame] | 169 | |
Alexander Belopolsky | e49af34 | 2015-03-01 15:08:17 -0500 | [diff] [blame] | 170 | def test_nested_optimization(self): |
| 171 | partial = self.partial |
Alexander Belopolsky | e49af34 | 2015-03-01 15:08:17 -0500 | [diff] [blame] | 172 | inner = partial(signature, 'asdf') |
| 173 | nested = partial(inner, bar=True) |
| 174 | flat = partial(signature, 'asdf', bar=True) |
| 175 | self.assertEqual(signature(nested), signature(flat)) |
| 176 | |
Berker Peksag | 9b93c6b | 2015-09-22 13:08:16 +0300 | [diff] [blame] | 177 | def test_nested_partial_with_attribute(self): |
| 178 | # see issue 25137 |
| 179 | partial = self.partial |
| 180 | |
| 181 | def foo(bar): |
| 182 | return bar |
| 183 | |
| 184 | p = partial(foo, 'first') |
| 185 | p2 = partial(p, 'second') |
| 186 | p2.new_attr = 'spam' |
| 187 | self.assertEqual(p2.new_attr, 'spam') |
| 188 | |
Alexander Belopolsky | 41e422a | 2010-12-01 20:05:49 +0000 | [diff] [blame] | 189 | def test_repr(self): |
| 190 | args = (object(), object()) |
| 191 | args_repr = ', '.join(repr(a) for a in args) |
Serhiy Storchaka | 0aa74e1 | 2015-02-15 16:20:47 +0200 | [diff] [blame] | 192 | kwargs = {'a': object(), 'b': object()} |
| 193 | kwargs_reprs = ['a={a!r}, b={b!r}'.format_map(kwargs), |
| 194 | 'b={b!r}, a={a!r}'.format_map(kwargs)] |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 195 | if self.partial in (c_functools.partial, py_functools.partial): |
Alexander Belopolsky | 41e422a | 2010-12-01 20:05:49 +0000 | [diff] [blame] | 196 | name = 'functools.partial' |
| 197 | else: |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 198 | name = self.partial.__name__ |
Alexander Belopolsky | 41e422a | 2010-12-01 20:05:49 +0000 | [diff] [blame] | 199 | |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 200 | f = self.partial(capture) |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 201 | self.assertEqual(f'{name}({capture!r})', repr(f)) |
Alexander Belopolsky | 41e422a | 2010-12-01 20:05:49 +0000 | [diff] [blame] | 202 | |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 203 | f = self.partial(capture, *args) |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 204 | self.assertEqual(f'{name}({capture!r}, {args_repr})', repr(f)) |
Alexander Belopolsky | 41e422a | 2010-12-01 20:05:49 +0000 | [diff] [blame] | 205 | |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 206 | f = self.partial(capture, **kwargs) |
Serhiy Storchaka | 0aa74e1 | 2015-02-15 16:20:47 +0200 | [diff] [blame] | 207 | self.assertIn(repr(f), |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 208 | [f'{name}({capture!r}, {kwargs_repr})' |
Serhiy Storchaka | 0aa74e1 | 2015-02-15 16:20:47 +0200 | [diff] [blame] | 209 | for kwargs_repr in kwargs_reprs]) |
Alexander Belopolsky | 41e422a | 2010-12-01 20:05:49 +0000 | [diff] [blame] | 210 | |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 211 | f = self.partial(capture, *args, **kwargs) |
Serhiy Storchaka | 0aa74e1 | 2015-02-15 16:20:47 +0200 | [diff] [blame] | 212 | self.assertIn(repr(f), |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 213 | [f'{name}({capture!r}, {args_repr}, {kwargs_repr})' |
Serhiy Storchaka | 0aa74e1 | 2015-02-15 16:20:47 +0200 | [diff] [blame] | 214 | for kwargs_repr in kwargs_reprs]) |
Alexander Belopolsky | 41e422a | 2010-12-01 20:05:49 +0000 | [diff] [blame] | 215 | |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 216 | def test_recursive_repr(self): |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 217 | if self.partial in (c_functools.partial, py_functools.partial): |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 218 | name = 'functools.partial' |
| 219 | else: |
| 220 | name = self.partial.__name__ |
| 221 | |
| 222 | f = self.partial(capture) |
| 223 | f.__setstate__((f, (), {}, {})) |
Serhiy Storchaka | 46fe29d | 2016-06-12 15:45:14 +0300 | [diff] [blame] | 224 | try: |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 225 | self.assertEqual(repr(f), '%s(...)' % (name,)) |
Serhiy Storchaka | 46fe29d | 2016-06-12 15:45:14 +0300 | [diff] [blame] | 226 | finally: |
| 227 | f.__setstate__((capture, (), {}, {})) |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 228 | |
| 229 | f = self.partial(capture) |
| 230 | f.__setstate__((capture, (f,), {}, {})) |
Serhiy Storchaka | 46fe29d | 2016-06-12 15:45:14 +0300 | [diff] [blame] | 231 | try: |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 232 | self.assertEqual(repr(f), '%s(%r, ...)' % (name, capture,)) |
Serhiy Storchaka | 46fe29d | 2016-06-12 15:45:14 +0300 | [diff] [blame] | 233 | finally: |
| 234 | f.__setstate__((capture, (), {}, {})) |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 235 | |
| 236 | f = self.partial(capture) |
| 237 | f.__setstate__((capture, (), {'a': f}, {})) |
Serhiy Storchaka | 46fe29d | 2016-06-12 15:45:14 +0300 | [diff] [blame] | 238 | try: |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 239 | self.assertEqual(repr(f), '%s(%r, a=...)' % (name, capture,)) |
Serhiy Storchaka | 46fe29d | 2016-06-12 15:45:14 +0300 | [diff] [blame] | 240 | finally: |
| 241 | f.__setstate__((capture, (), {}, {})) |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 242 | |
Jack Diederich | e0cbd69 | 2009-04-01 04:27:09 +0000 | [diff] [blame] | 243 | def test_pickle(self): |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 244 | with self.AllowPickle(): |
| 245 | f = self.partial(signature, ['asdf'], bar=[True]) |
| 246 | f.attr = [] |
| 247 | for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| 248 | f_copy = pickle.loads(pickle.dumps(f, proto)) |
| 249 | self.assertEqual(signature(f_copy), signature(f)) |
Serhiy Storchaka | 3874128 | 2016-02-02 18:45:17 +0200 | [diff] [blame] | 250 | |
| 251 | def test_copy(self): |
| 252 | f = self.partial(signature, ['asdf'], bar=[True]) |
| 253 | f.attr = [] |
| 254 | f_copy = copy.copy(f) |
| 255 | self.assertEqual(signature(f_copy), signature(f)) |
| 256 | self.assertIs(f_copy.attr, f.attr) |
| 257 | self.assertIs(f_copy.args, f.args) |
| 258 | self.assertIs(f_copy.keywords, f.keywords) |
| 259 | |
| 260 | def test_deepcopy(self): |
| 261 | f = self.partial(signature, ['asdf'], bar=[True]) |
| 262 | f.attr = [] |
| 263 | f_copy = copy.deepcopy(f) |
| 264 | self.assertEqual(signature(f_copy), signature(f)) |
| 265 | self.assertIsNot(f_copy.attr, f.attr) |
| 266 | self.assertIsNot(f_copy.args, f.args) |
| 267 | self.assertIsNot(f_copy.args[0], f.args[0]) |
| 268 | self.assertIsNot(f_copy.keywords, f.keywords) |
| 269 | self.assertIsNot(f_copy.keywords['bar'], f.keywords['bar']) |
| 270 | |
| 271 | def test_setstate(self): |
| 272 | f = self.partial(signature) |
| 273 | f.__setstate__((capture, (1,), dict(a=10), dict(attr=[]))) |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 274 | |
Serhiy Storchaka | 3874128 | 2016-02-02 18:45:17 +0200 | [diff] [blame] | 275 | self.assertEqual(signature(f), |
| 276 | (capture, (1,), dict(a=10), dict(attr=[]))) |
| 277 | self.assertEqual(f(2, b=20), ((1, 2), {'a': 10, 'b': 20})) |
| 278 | |
| 279 | f.__setstate__((capture, (1,), dict(a=10), None)) |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 280 | |
Serhiy Storchaka | 3874128 | 2016-02-02 18:45:17 +0200 | [diff] [blame] | 281 | self.assertEqual(signature(f), (capture, (1,), dict(a=10), {})) |
| 282 | self.assertEqual(f(2, b=20), ((1, 2), {'a': 10, 'b': 20})) |
| 283 | |
| 284 | f.__setstate__((capture, (1,), None, None)) |
| 285 | #self.assertEqual(signature(f), (capture, (1,), {}, {})) |
| 286 | self.assertEqual(f(2, b=20), ((1, 2), {'b': 20})) |
| 287 | self.assertEqual(f(2), ((1, 2), {})) |
| 288 | self.assertEqual(f(), ((1,), {})) |
| 289 | |
| 290 | f.__setstate__((capture, (), {}, None)) |
| 291 | self.assertEqual(signature(f), (capture, (), {}, {})) |
| 292 | self.assertEqual(f(2, b=20), ((2,), {'b': 20})) |
| 293 | self.assertEqual(f(2), ((2,), {})) |
| 294 | self.assertEqual(f(), ((), {})) |
| 295 | |
| 296 | def test_setstate_errors(self): |
| 297 | f = self.partial(signature) |
| 298 | self.assertRaises(TypeError, f.__setstate__, (capture, (), {})) |
| 299 | self.assertRaises(TypeError, f.__setstate__, (capture, (), {}, {}, None)) |
| 300 | self.assertRaises(TypeError, f.__setstate__, [capture, (), {}, None]) |
| 301 | self.assertRaises(TypeError, f.__setstate__, (None, (), {}, None)) |
| 302 | self.assertRaises(TypeError, f.__setstate__, (capture, None, {}, None)) |
| 303 | self.assertRaises(TypeError, f.__setstate__, (capture, [], {}, None)) |
| 304 | self.assertRaises(TypeError, f.__setstate__, (capture, (), [], None)) |
| 305 | |
| 306 | def test_setstate_subclasses(self): |
| 307 | f = self.partial(signature) |
| 308 | f.__setstate__((capture, MyTuple((1,)), MyDict(a=10), None)) |
| 309 | s = signature(f) |
| 310 | self.assertEqual(s, (capture, (1,), dict(a=10), {})) |
| 311 | self.assertIs(type(s[1]), tuple) |
| 312 | self.assertIs(type(s[2]), dict) |
| 313 | r = f() |
| 314 | self.assertEqual(r, ((1,), {'a': 10})) |
| 315 | self.assertIs(type(r[0]), tuple) |
| 316 | self.assertIs(type(r[1]), dict) |
| 317 | |
| 318 | f.__setstate__((capture, BadTuple((1,)), {}, None)) |
| 319 | s = signature(f) |
| 320 | self.assertEqual(s, (capture, (1,), {}, {})) |
| 321 | self.assertIs(type(s[1]), tuple) |
| 322 | r = f(2) |
| 323 | self.assertEqual(r, ((1, 2), {})) |
| 324 | self.assertIs(type(r[0]), tuple) |
Jack Diederich | e0cbd69 | 2009-04-01 04:27:09 +0000 | [diff] [blame] | 325 | |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 326 | def test_recursive_pickle(self): |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 327 | with self.AllowPickle(): |
| 328 | f = self.partial(capture) |
| 329 | f.__setstate__((f, (), {}, {})) |
| 330 | try: |
| 331 | for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| 332 | with self.assertRaises(RecursionError): |
| 333 | pickle.dumps(f, proto) |
| 334 | finally: |
| 335 | f.__setstate__((capture, (), {}, {})) |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 336 | |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 337 | f = self.partial(capture) |
| 338 | f.__setstate__((capture, (f,), {}, {})) |
| 339 | try: |
| 340 | for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| 341 | f_copy = pickle.loads(pickle.dumps(f, proto)) |
| 342 | try: |
| 343 | self.assertIs(f_copy.args[0], f_copy) |
| 344 | finally: |
| 345 | f_copy.__setstate__((capture, (), {}, {})) |
| 346 | finally: |
| 347 | f.__setstate__((capture, (), {}, {})) |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 348 | |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 349 | f = self.partial(capture) |
| 350 | f.__setstate__((capture, (), {'a': f}, {})) |
| 351 | try: |
| 352 | for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| 353 | f_copy = pickle.loads(pickle.dumps(f, proto)) |
| 354 | try: |
| 355 | self.assertIs(f_copy.keywords['a'], f_copy) |
| 356 | finally: |
| 357 | f_copy.__setstate__((capture, (), {}, {})) |
| 358 | finally: |
| 359 | f.__setstate__((capture, (), {}, {})) |
Serhiy Storchaka | 179f960 | 2016-06-12 11:44:06 +0300 | [diff] [blame] | 360 | |
Serhiy Storchaka | 19c4e0d | 2013-02-04 12:47:24 +0200 | [diff] [blame] | 361 | # Issue 6083: Reference counting bug |
| 362 | def test_setstate_refcount(self): |
| 363 | class BadSequence: |
| 364 | def __len__(self): |
| 365 | return 4 |
| 366 | def __getitem__(self, key): |
| 367 | if key == 0: |
| 368 | return max |
| 369 | elif key == 1: |
| 370 | return tuple(range(1000000)) |
| 371 | elif key in (2, 3): |
| 372 | return {} |
| 373 | raise IndexError |
| 374 | |
Serhiy Storchaka | b6a5340 | 2013-02-04 12:57:16 +0200 | [diff] [blame] | 375 | f = self.partial(object) |
Serhiy Storchaka | 3874128 | 2016-02-02 18:45:17 +0200 | [diff] [blame] | 376 | self.assertRaises(TypeError, f.__setstate__, BadSequence()) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 377 | |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 378 | @unittest.skipUnless(c_functools, 'requires the C _functools module') |
| 379 | class TestPartialC(TestPartial, unittest.TestCase): |
| 380 | if c_functools: |
| 381 | partial = c_functools.partial |
| 382 | |
| 383 | class AllowPickle: |
| 384 | def __enter__(self): |
| 385 | return self |
| 386 | def __exit__(self, type, value, tb): |
| 387 | return False |
| 388 | |
| 389 | def test_attributes_unwritable(self): |
| 390 | # attributes should not be writable |
| 391 | p = self.partial(capture, 1, 2, a=10, b=20) |
| 392 | self.assertRaises(AttributeError, setattr, p, 'func', map) |
| 393 | self.assertRaises(AttributeError, setattr, p, 'args', (1, 2)) |
| 394 | self.assertRaises(AttributeError, setattr, p, 'keywords', dict(a=1, b=2)) |
| 395 | |
| 396 | p = self.partial(hex) |
| 397 | try: |
| 398 | del p.__dict__ |
| 399 | except TypeError: |
| 400 | pass |
| 401 | else: |
| 402 | self.fail('partial object allowed __dict__ to be deleted') |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 403 | |
Michael Seifert | 6c3d527 | 2017-03-15 06:26:33 +0100 | [diff] [blame] | 404 | def test_manually_adding_non_string_keyword(self): |
| 405 | p = self.partial(capture) |
| 406 | # Adding a non-string/unicode keyword to partial kwargs |
| 407 | p.keywords[1234] = 'value' |
| 408 | r = repr(p) |
| 409 | self.assertIn('1234', r) |
| 410 | self.assertIn("'value'", r) |
| 411 | with self.assertRaises(TypeError): |
| 412 | p() |
| 413 | |
| 414 | def test_keystr_replaces_value(self): |
| 415 | p = self.partial(capture) |
| 416 | |
| 417 | class MutatesYourDict(object): |
| 418 | def __str__(self): |
| 419 | p.keywords[self] = ['sth2'] |
| 420 | return 'astr' |
| 421 | |
| 422 | # Raplacing the value during key formatting should keep the original |
| 423 | # value alive (at least long enough). |
| 424 | p.keywords[MutatesYourDict()] = ['sth'] |
| 425 | r = repr(p) |
| 426 | self.assertIn('astr', r) |
| 427 | self.assertIn("['sth']", r) |
| 428 | |
| 429 | |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 430 | class TestPartialPy(TestPartial, unittest.TestCase): |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 431 | partial = py_functools.partial |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 432 | |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 433 | class AllowPickle: |
| 434 | def __init__(self): |
| 435 | self._cm = replaced_module("functools", py_functools) |
| 436 | def __enter__(self): |
| 437 | return self._cm.__enter__() |
| 438 | def __exit__(self, type, value, tb): |
| 439 | return self._cm.__exit__(type, value, tb) |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 440 | |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 441 | if c_functools: |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 442 | class CPartialSubclass(c_functools.partial): |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 443 | pass |
Antoine Pitrou | 3354327 | 2012-11-13 21:36:21 +0100 | [diff] [blame] | 444 | |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 445 | class PyPartialSubclass(py_functools.partial): |
| 446 | pass |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 447 | |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 448 | @unittest.skipUnless(c_functools, 'requires the C _functools module') |
Serhiy Storchaka | b6a5340 | 2013-02-04 12:57:16 +0200 | [diff] [blame] | 449 | class TestPartialCSubclass(TestPartialC): |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 450 | if c_functools: |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 451 | partial = CPartialSubclass |
Jack Diederich | e0cbd69 | 2009-04-01 04:27:09 +0000 | [diff] [blame] | 452 | |
Berker Peksag | 9b93c6b | 2015-09-22 13:08:16 +0300 | [diff] [blame] | 453 | # partial subclasses are not optimized for nested calls |
| 454 | test_nested_optimization = None |
| 455 | |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 456 | class TestPartialPySubclass(TestPartialPy): |
| 457 | partial = PyPartialSubclass |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 458 | |
Nick Coghlan | f4cb48a | 2013-11-03 16:41:46 +1000 | [diff] [blame] | 459 | class TestPartialMethod(unittest.TestCase): |
| 460 | |
| 461 | class A(object): |
| 462 | nothing = functools.partialmethod(capture) |
| 463 | positional = functools.partialmethod(capture, 1) |
| 464 | keywords = functools.partialmethod(capture, a=2) |
| 465 | both = functools.partialmethod(capture, 3, b=4) |
| 466 | |
| 467 | nested = functools.partialmethod(positional, 5) |
| 468 | |
| 469 | over_partial = functools.partialmethod(functools.partial(capture, c=6), 7) |
| 470 | |
| 471 | static = functools.partialmethod(staticmethod(capture), 8) |
| 472 | cls = functools.partialmethod(classmethod(capture), d=9) |
| 473 | |
| 474 | a = A() |
| 475 | |
| 476 | def test_arg_combinations(self): |
| 477 | self.assertEqual(self.a.nothing(), ((self.a,), {})) |
| 478 | self.assertEqual(self.a.nothing(5), ((self.a, 5), {})) |
| 479 | self.assertEqual(self.a.nothing(c=6), ((self.a,), {'c': 6})) |
| 480 | self.assertEqual(self.a.nothing(5, c=6), ((self.a, 5), {'c': 6})) |
| 481 | |
| 482 | self.assertEqual(self.a.positional(), ((self.a, 1), {})) |
| 483 | self.assertEqual(self.a.positional(5), ((self.a, 1, 5), {})) |
| 484 | self.assertEqual(self.a.positional(c=6), ((self.a, 1), {'c': 6})) |
| 485 | self.assertEqual(self.a.positional(5, c=6), ((self.a, 1, 5), {'c': 6})) |
| 486 | |
| 487 | self.assertEqual(self.a.keywords(), ((self.a,), {'a': 2})) |
| 488 | self.assertEqual(self.a.keywords(5), ((self.a, 5), {'a': 2})) |
| 489 | self.assertEqual(self.a.keywords(c=6), ((self.a,), {'a': 2, 'c': 6})) |
| 490 | self.assertEqual(self.a.keywords(5, c=6), ((self.a, 5), {'a': 2, 'c': 6})) |
| 491 | |
| 492 | self.assertEqual(self.a.both(), ((self.a, 3), {'b': 4})) |
| 493 | self.assertEqual(self.a.both(5), ((self.a, 3, 5), {'b': 4})) |
| 494 | self.assertEqual(self.a.both(c=6), ((self.a, 3), {'b': 4, 'c': 6})) |
| 495 | self.assertEqual(self.a.both(5, c=6), ((self.a, 3, 5), {'b': 4, 'c': 6})) |
| 496 | |
| 497 | self.assertEqual(self.A.both(self.a, 5, c=6), ((self.a, 3, 5), {'b': 4, 'c': 6})) |
| 498 | |
| 499 | def test_nested(self): |
| 500 | self.assertEqual(self.a.nested(), ((self.a, 1, 5), {})) |
| 501 | self.assertEqual(self.a.nested(6), ((self.a, 1, 5, 6), {})) |
| 502 | self.assertEqual(self.a.nested(d=7), ((self.a, 1, 5), {'d': 7})) |
| 503 | self.assertEqual(self.a.nested(6, d=7), ((self.a, 1, 5, 6), {'d': 7})) |
| 504 | |
| 505 | self.assertEqual(self.A.nested(self.a, 6, d=7), ((self.a, 1, 5, 6), {'d': 7})) |
| 506 | |
| 507 | def test_over_partial(self): |
| 508 | self.assertEqual(self.a.over_partial(), ((self.a, 7), {'c': 6})) |
| 509 | self.assertEqual(self.a.over_partial(5), ((self.a, 7, 5), {'c': 6})) |
| 510 | self.assertEqual(self.a.over_partial(d=8), ((self.a, 7), {'c': 6, 'd': 8})) |
| 511 | self.assertEqual(self.a.over_partial(5, d=8), ((self.a, 7, 5), {'c': 6, 'd': 8})) |
| 512 | |
| 513 | self.assertEqual(self.A.over_partial(self.a, 5, d=8), ((self.a, 7, 5), {'c': 6, 'd': 8})) |
| 514 | |
| 515 | def test_bound_method_introspection(self): |
| 516 | obj = self.a |
| 517 | self.assertIs(obj.both.__self__, obj) |
| 518 | self.assertIs(obj.nested.__self__, obj) |
| 519 | self.assertIs(obj.over_partial.__self__, obj) |
| 520 | self.assertIs(obj.cls.__self__, self.A) |
| 521 | self.assertIs(self.A.cls.__self__, self.A) |
| 522 | |
| 523 | def test_unbound_method_retrieval(self): |
| 524 | obj = self.A |
| 525 | self.assertFalse(hasattr(obj.both, "__self__")) |
| 526 | self.assertFalse(hasattr(obj.nested, "__self__")) |
| 527 | self.assertFalse(hasattr(obj.over_partial, "__self__")) |
| 528 | self.assertFalse(hasattr(obj.static, "__self__")) |
| 529 | self.assertFalse(hasattr(self.a.static, "__self__")) |
| 530 | |
| 531 | def test_descriptors(self): |
| 532 | for obj in [self.A, self.a]: |
| 533 | with self.subTest(obj=obj): |
| 534 | self.assertEqual(obj.static(), ((8,), {})) |
| 535 | self.assertEqual(obj.static(5), ((8, 5), {})) |
| 536 | self.assertEqual(obj.static(d=8), ((8,), {'d': 8})) |
| 537 | self.assertEqual(obj.static(5, d=8), ((8, 5), {'d': 8})) |
| 538 | |
| 539 | self.assertEqual(obj.cls(), ((self.A,), {'d': 9})) |
| 540 | self.assertEqual(obj.cls(5), ((self.A, 5), {'d': 9})) |
| 541 | self.assertEqual(obj.cls(c=8), ((self.A,), {'c': 8, 'd': 9})) |
| 542 | self.assertEqual(obj.cls(5, c=8), ((self.A, 5), {'c': 8, 'd': 9})) |
| 543 | |
| 544 | def test_overriding_keywords(self): |
| 545 | self.assertEqual(self.a.keywords(a=3), ((self.a,), {'a': 3})) |
| 546 | self.assertEqual(self.A.keywords(self.a, a=3), ((self.a,), {'a': 3})) |
| 547 | |
| 548 | def test_invalid_args(self): |
| 549 | with self.assertRaises(TypeError): |
| 550 | class B(object): |
| 551 | method = functools.partialmethod(None, 1) |
| 552 | |
| 553 | def test_repr(self): |
| 554 | self.assertEqual(repr(vars(self.A)['both']), |
| 555 | 'functools.partialmethod({}, 3, b=4)'.format(capture)) |
| 556 | |
| 557 | def test_abstract(self): |
| 558 | class Abstract(abc.ABCMeta): |
| 559 | |
| 560 | @abc.abstractmethod |
| 561 | def add(self, x, y): |
| 562 | pass |
| 563 | |
| 564 | add5 = functools.partialmethod(add, 5) |
| 565 | |
| 566 | self.assertTrue(Abstract.add.__isabstractmethod__) |
| 567 | self.assertTrue(Abstract.add5.__isabstractmethod__) |
| 568 | |
| 569 | for func in [self.A.static, self.A.cls, self.A.over_partial, self.A.nested, self.A.both]: |
| 570 | self.assertFalse(getattr(func, '__isabstractmethod__', False)) |
| 571 | |
| 572 | |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 573 | class TestUpdateWrapper(unittest.TestCase): |
| 574 | |
| 575 | def check_wrapper(self, wrapper, wrapped, |
| 576 | assigned=functools.WRAPPER_ASSIGNMENTS, |
| 577 | updated=functools.WRAPPER_UPDATES): |
| 578 | # Check attributes were assigned |
| 579 | for name in assigned: |
Nick Coghlan | 24c05bc | 2013-07-15 21:13:08 +1000 | [diff] [blame] | 580 | self.assertIs(getattr(wrapper, name), getattr(wrapped, name)) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 581 | # Check attributes were updated |
| 582 | for name in updated: |
| 583 | wrapper_attr = getattr(wrapper, name) |
| 584 | wrapped_attr = getattr(wrapped, name) |
| 585 | for key in wrapped_attr: |
Nick Coghlan | 24c05bc | 2013-07-15 21:13:08 +1000 | [diff] [blame] | 586 | if name == "__dict__" and key == "__wrapped__": |
| 587 | # __wrapped__ is overwritten by the update code |
| 588 | continue |
| 589 | self.assertIs(wrapped_attr[key], wrapper_attr[key]) |
| 590 | # Check __wrapped__ |
| 591 | self.assertIs(wrapper.__wrapped__, wrapped) |
| 592 | |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 593 | |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 594 | def _default_update(self): |
Antoine Pitrou | 560f764 | 2010-08-04 18:28:02 +0000 | [diff] [blame] | 595 | def f(a:'This is a new annotation'): |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 596 | """This is a test""" |
| 597 | pass |
| 598 | f.attr = 'This is also a test' |
Nick Coghlan | 24c05bc | 2013-07-15 21:13:08 +1000 | [diff] [blame] | 599 | f.__wrapped__ = "This is a bald faced lie" |
Antoine Pitrou | 560f764 | 2010-08-04 18:28:02 +0000 | [diff] [blame] | 600 | def wrapper(b:'This is the prior annotation'): |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 601 | pass |
| 602 | functools.update_wrapper(wrapper, f) |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 603 | return wrapper, f |
| 604 | |
| 605 | def test_default_update(self): |
| 606 | wrapper, f = self._default_update() |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 607 | self.check_wrapper(wrapper, f) |
Nick Coghlan | 9887683 | 2010-08-17 06:17:18 +0000 | [diff] [blame] | 608 | self.assertIs(wrapper.__wrapped__, f) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 609 | self.assertEqual(wrapper.__name__, 'f') |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 610 | self.assertEqual(wrapper.__qualname__, f.__qualname__) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 611 | self.assertEqual(wrapper.attr, 'This is also a test') |
Antoine Pitrou | 560f764 | 2010-08-04 18:28:02 +0000 | [diff] [blame] | 612 | self.assertEqual(wrapper.__annotations__['a'], 'This is a new annotation') |
| 613 | self.assertNotIn('b', wrapper.__annotations__) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 614 | |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 615 | @unittest.skipIf(sys.flags.optimize >= 2, |
| 616 | "Docstrings are omitted with -O2 and above") |
| 617 | def test_default_update_doc(self): |
| 618 | wrapper, f = self._default_update() |
| 619 | self.assertEqual(wrapper.__doc__, 'This is a test') |
| 620 | |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 621 | def test_no_update(self): |
| 622 | def f(): |
| 623 | """This is a test""" |
| 624 | pass |
| 625 | f.attr = 'This is also a test' |
| 626 | def wrapper(): |
| 627 | pass |
| 628 | functools.update_wrapper(wrapper, f, (), ()) |
| 629 | self.check_wrapper(wrapper, f, (), ()) |
| 630 | self.assertEqual(wrapper.__name__, 'wrapper') |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 631 | self.assertNotEqual(wrapper.__qualname__, f.__qualname__) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 632 | self.assertEqual(wrapper.__doc__, None) |
Antoine Pitrou | 560f764 | 2010-08-04 18:28:02 +0000 | [diff] [blame] | 633 | self.assertEqual(wrapper.__annotations__, {}) |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 634 | self.assertFalse(hasattr(wrapper, 'attr')) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 635 | |
| 636 | def test_selective_update(self): |
| 637 | def f(): |
| 638 | pass |
| 639 | f.attr = 'This is a different test' |
| 640 | f.dict_attr = dict(a=1, b=2, c=3) |
| 641 | def wrapper(): |
| 642 | pass |
| 643 | wrapper.dict_attr = {} |
| 644 | assign = ('attr',) |
| 645 | update = ('dict_attr',) |
| 646 | functools.update_wrapper(wrapper, f, assign, update) |
| 647 | self.check_wrapper(wrapper, f, assign, update) |
| 648 | self.assertEqual(wrapper.__name__, 'wrapper') |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 649 | self.assertNotEqual(wrapper.__qualname__, f.__qualname__) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 650 | self.assertEqual(wrapper.__doc__, None) |
| 651 | self.assertEqual(wrapper.attr, 'This is a different test') |
| 652 | self.assertEqual(wrapper.dict_attr, f.dict_attr) |
| 653 | |
Nick Coghlan | 9887683 | 2010-08-17 06:17:18 +0000 | [diff] [blame] | 654 | def test_missing_attributes(self): |
| 655 | def f(): |
| 656 | pass |
| 657 | def wrapper(): |
| 658 | pass |
| 659 | wrapper.dict_attr = {} |
| 660 | assign = ('attr',) |
| 661 | update = ('dict_attr',) |
| 662 | # Missing attributes on wrapped object are ignored |
| 663 | functools.update_wrapper(wrapper, f, assign, update) |
| 664 | self.assertNotIn('attr', wrapper.__dict__) |
| 665 | self.assertEqual(wrapper.dict_attr, {}) |
| 666 | # Wrapper must have expected attributes for updating |
| 667 | del wrapper.dict_attr |
| 668 | with self.assertRaises(AttributeError): |
| 669 | functools.update_wrapper(wrapper, f, assign, update) |
| 670 | wrapper.dict_attr = 1 |
| 671 | with self.assertRaises(AttributeError): |
| 672 | functools.update_wrapper(wrapper, f, assign, update) |
| 673 | |
Serhiy Storchaka | 9d0add0 | 2013-01-27 19:47:45 +0200 | [diff] [blame] | 674 | @support.requires_docstrings |
Nick Coghlan | 9887683 | 2010-08-17 06:17:18 +0000 | [diff] [blame] | 675 | @unittest.skipIf(sys.flags.optimize >= 2, |
| 676 | "Docstrings are omitted with -O2 and above") |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 677 | def test_builtin_update(self): |
| 678 | # Test for bug #1576241 |
| 679 | def wrapper(): |
| 680 | pass |
| 681 | functools.update_wrapper(wrapper, max) |
| 682 | self.assertEqual(wrapper.__name__, 'max') |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 683 | self.assertTrue(wrapper.__doc__.startswith('max(')) |
Antoine Pitrou | 560f764 | 2010-08-04 18:28:02 +0000 | [diff] [blame] | 684 | self.assertEqual(wrapper.__annotations__, {}) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 685 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 686 | |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 687 | class TestWraps(TestUpdateWrapper): |
| 688 | |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 689 | def _default_update(self): |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 690 | def f(): |
| 691 | """This is a test""" |
| 692 | pass |
| 693 | f.attr = 'This is also a test' |
Nick Coghlan | 24c05bc | 2013-07-15 21:13:08 +1000 | [diff] [blame] | 694 | f.__wrapped__ = "This is still a bald faced lie" |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 695 | @functools.wraps(f) |
| 696 | def wrapper(): |
| 697 | pass |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 698 | return wrapper, f |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 699 | |
| 700 | def test_default_update(self): |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 701 | wrapper, f = self._default_update() |
Nick Coghlan | 24c05bc | 2013-07-15 21:13:08 +1000 | [diff] [blame] | 702 | self.check_wrapper(wrapper, f) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 703 | self.assertEqual(wrapper.__name__, 'f') |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 704 | self.assertEqual(wrapper.__qualname__, f.__qualname__) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 705 | self.assertEqual(wrapper.attr, 'This is also a test') |
| 706 | |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 707 | @unittest.skipIf(sys.flags.optimize >= 2, |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 708 | "Docstrings are omitted with -O2 and above") |
| 709 | def test_default_update_doc(self): |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 710 | wrapper, _ = self._default_update() |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 711 | self.assertEqual(wrapper.__doc__, 'This is a test') |
| 712 | |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 713 | def test_no_update(self): |
| 714 | def f(): |
| 715 | """This is a test""" |
| 716 | pass |
| 717 | f.attr = 'This is also a test' |
| 718 | @functools.wraps(f, (), ()) |
| 719 | def wrapper(): |
| 720 | pass |
| 721 | self.check_wrapper(wrapper, f, (), ()) |
| 722 | self.assertEqual(wrapper.__name__, 'wrapper') |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 723 | self.assertNotEqual(wrapper.__qualname__, f.__qualname__) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 724 | self.assertEqual(wrapper.__doc__, None) |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 725 | self.assertFalse(hasattr(wrapper, 'attr')) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 726 | |
| 727 | def test_selective_update(self): |
| 728 | def f(): |
| 729 | pass |
| 730 | f.attr = 'This is a different test' |
| 731 | f.dict_attr = dict(a=1, b=2, c=3) |
| 732 | def add_dict_attr(f): |
| 733 | f.dict_attr = {} |
| 734 | return f |
| 735 | assign = ('attr',) |
| 736 | update = ('dict_attr',) |
| 737 | @functools.wraps(f, assign, update) |
| 738 | @add_dict_attr |
| 739 | def wrapper(): |
| 740 | pass |
| 741 | self.check_wrapper(wrapper, f, assign, update) |
| 742 | self.assertEqual(wrapper.__name__, 'wrapper') |
Meador Inge | ff7f64c | 2011-12-11 22:37:31 -0600 | [diff] [blame] | 743 | self.assertNotEqual(wrapper.__qualname__, f.__qualname__) |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 744 | self.assertEqual(wrapper.__doc__, None) |
| 745 | self.assertEqual(wrapper.attr, 'This is a different test') |
| 746 | self.assertEqual(wrapper.dict_attr, f.dict_attr) |
| 747 | |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 748 | @unittest.skipUnless(c_functools, 'requires the C _functools module') |
Guido van Rossum | 0919a1a | 2006-08-26 20:49:04 +0000 | [diff] [blame] | 749 | class TestReduce(unittest.TestCase): |
Nick Coghlan | 457fc9a | 2016-09-10 20:00:02 +1000 | [diff] [blame] | 750 | if c_functools: |
| 751 | func = c_functools.reduce |
Guido van Rossum | 0919a1a | 2006-08-26 20:49:04 +0000 | [diff] [blame] | 752 | |
| 753 | def test_reduce(self): |
| 754 | class Squares: |
| 755 | def __init__(self, max): |
| 756 | self.max = max |
| 757 | self.sofar = [] |
| 758 | |
| 759 | def __len__(self): |
| 760 | return len(self.sofar) |
| 761 | |
| 762 | def __getitem__(self, i): |
| 763 | if not 0 <= i < self.max: raise IndexError |
| 764 | n = len(self.sofar) |
| 765 | while n <= i: |
| 766 | self.sofar.append(n*n) |
| 767 | n += 1 |
| 768 | return self.sofar[i] |
Alexander Belopolsky | e29e6bf | 2010-08-16 18:55:46 +0000 | [diff] [blame] | 769 | def add(x, y): |
| 770 | return x + y |
| 771 | self.assertEqual(self.func(add, ['a', 'b', 'c'], ''), 'abc') |
Guido van Rossum | 0919a1a | 2006-08-26 20:49:04 +0000 | [diff] [blame] | 772 | self.assertEqual( |
Alexander Belopolsky | e29e6bf | 2010-08-16 18:55:46 +0000 | [diff] [blame] | 773 | self.func(add, [['a', 'c'], [], ['d', 'w']], []), |
Guido van Rossum | 0919a1a | 2006-08-26 20:49:04 +0000 | [diff] [blame] | 774 | ['a','c','d','w'] |
| 775 | ) |
| 776 | self.assertEqual(self.func(lambda x, y: x*y, range(2,8), 1), 5040) |
| 777 | self.assertEqual( |
Guido van Rossum | e2a383d | 2007-01-15 16:59:06 +0000 | [diff] [blame] | 778 | self.func(lambda x, y: x*y, range(2,21), 1), |
| 779 | 2432902008176640000 |
Guido van Rossum | 0919a1a | 2006-08-26 20:49:04 +0000 | [diff] [blame] | 780 | ) |
Alexander Belopolsky | e29e6bf | 2010-08-16 18:55:46 +0000 | [diff] [blame] | 781 | self.assertEqual(self.func(add, Squares(10)), 285) |
| 782 | self.assertEqual(self.func(add, Squares(10), 0), 285) |
| 783 | self.assertEqual(self.func(add, Squares(0), 0), 0) |
Guido van Rossum | 0919a1a | 2006-08-26 20:49:04 +0000 | [diff] [blame] | 784 | self.assertRaises(TypeError, self.func) |
| 785 | self.assertRaises(TypeError, self.func, 42, 42) |
| 786 | self.assertRaises(TypeError, self.func, 42, 42, 42) |
| 787 | self.assertEqual(self.func(42, "1"), "1") # func is never called with one item |
| 788 | self.assertEqual(self.func(42, "", "1"), "1") # func is never called with one item |
| 789 | self.assertRaises(TypeError, self.func, 42, (42, 42)) |
Alexander Belopolsky | e29e6bf | 2010-08-16 18:55:46 +0000 | [diff] [blame] | 790 | self.assertRaises(TypeError, self.func, add, []) # arg 2 must not be empty sequence with no initial value |
| 791 | self.assertRaises(TypeError, self.func, add, "") |
| 792 | self.assertRaises(TypeError, self.func, add, ()) |
| 793 | self.assertRaises(TypeError, self.func, add, object()) |
| 794 | |
| 795 | class TestFailingIter: |
| 796 | def __iter__(self): |
| 797 | raise RuntimeError |
| 798 | self.assertRaises(RuntimeError, self.func, add, TestFailingIter()) |
| 799 | |
| 800 | self.assertEqual(self.func(add, [], None), None) |
| 801 | self.assertEqual(self.func(add, [], 42), 42) |
Guido van Rossum | 0919a1a | 2006-08-26 20:49:04 +0000 | [diff] [blame] | 802 | |
| 803 | class BadSeq: |
| 804 | def __getitem__(self, index): |
| 805 | raise ValueError |
| 806 | self.assertRaises(ValueError, self.func, 42, BadSeq()) |
| 807 | |
| 808 | # Test reduce()'s use of iterators. |
| 809 | def test_iterator_usage(self): |
| 810 | class SequenceClass: |
| 811 | def __init__(self, n): |
| 812 | self.n = n |
| 813 | def __getitem__(self, i): |
| 814 | if 0 <= i < self.n: |
| 815 | return i |
| 816 | else: |
| 817 | raise IndexError |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 818 | |
Guido van Rossum | 0919a1a | 2006-08-26 20:49:04 +0000 | [diff] [blame] | 819 | from operator import add |
| 820 | self.assertEqual(self.func(add, SequenceClass(5)), 10) |
| 821 | self.assertEqual(self.func(add, SequenceClass(5), 42), 52) |
| 822 | self.assertRaises(TypeError, self.func, add, SequenceClass(0)) |
| 823 | self.assertEqual(self.func(add, SequenceClass(0), 42), 42) |
| 824 | self.assertEqual(self.func(add, SequenceClass(1)), 0) |
| 825 | self.assertEqual(self.func(add, SequenceClass(1), 42), 42) |
| 826 | |
| 827 | d = {"one": 1, "two": 2, "three": 3} |
| 828 | self.assertEqual(self.func(add, d), "".join(d.keys())) |
| 829 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 830 | |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 831 | class TestCmpToKey: |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 832 | |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 833 | def test_cmp_to_key(self): |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 834 | def cmp1(x, y): |
| 835 | return (x > y) - (x < y) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 836 | key = self.cmp_to_key(cmp1) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 837 | self.assertEqual(key(3), key(3)) |
| 838 | self.assertGreater(key(3), key(1)) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 839 | self.assertGreaterEqual(key(3), key(3)) |
| 840 | |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 841 | def cmp2(x, y): |
| 842 | return int(x) - int(y) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 843 | key = self.cmp_to_key(cmp2) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 844 | self.assertEqual(key(4.0), key('4')) |
| 845 | self.assertLess(key(2), key('35')) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 846 | self.assertLessEqual(key(2), key('35')) |
| 847 | self.assertNotEqual(key(2), key('35')) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 848 | |
| 849 | def test_cmp_to_key_arguments(self): |
| 850 | def cmp1(x, y): |
| 851 | return (x > y) - (x < y) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 852 | key = self.cmp_to_key(mycmp=cmp1) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 853 | self.assertEqual(key(obj=3), key(obj=3)) |
| 854 | self.assertGreater(key(obj=3), key(obj=1)) |
| 855 | with self.assertRaises((TypeError, AttributeError)): |
| 856 | key(3) > 1 # rhs is not a K object |
| 857 | with self.assertRaises((TypeError, AttributeError)): |
| 858 | 1 < key(3) # lhs is not a K object |
| 859 | with self.assertRaises(TypeError): |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 860 | key = self.cmp_to_key() # too few args |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 861 | with self.assertRaises(TypeError): |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 862 | key = self.cmp_to_key(cmp1, None) # too many args |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 863 | key = self.cmp_to_key(cmp1) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 864 | with self.assertRaises(TypeError): |
| 865 | key() # too few args |
| 866 | with self.assertRaises(TypeError): |
| 867 | key(None, None) # too many args |
| 868 | |
| 869 | def test_bad_cmp(self): |
| 870 | def cmp1(x, y): |
| 871 | raise ZeroDivisionError |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 872 | key = self.cmp_to_key(cmp1) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 873 | with self.assertRaises(ZeroDivisionError): |
| 874 | key(3) > key(1) |
| 875 | |
| 876 | class BadCmp: |
| 877 | def __lt__(self, other): |
| 878 | raise ZeroDivisionError |
| 879 | def cmp1(x, y): |
| 880 | return BadCmp() |
| 881 | with self.assertRaises(ZeroDivisionError): |
| 882 | key(3) > key(1) |
| 883 | |
| 884 | def test_obj_field(self): |
| 885 | def cmp1(x, y): |
| 886 | return (x > y) - (x < y) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 887 | key = self.cmp_to_key(mycmp=cmp1) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 888 | self.assertEqual(key(50).obj, 50) |
| 889 | |
| 890 | def test_sort_int(self): |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 891 | def mycmp(x, y): |
| 892 | return y - x |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 893 | self.assertEqual(sorted(range(5), key=self.cmp_to_key(mycmp)), |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 894 | [4, 3, 2, 1, 0]) |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 895 | |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 896 | def test_sort_int_str(self): |
| 897 | def mycmp(x, y): |
| 898 | x, y = int(x), int(y) |
| 899 | return (x > y) - (x < y) |
| 900 | values = [5, '3', 7, 2, '0', '1', 4, '10', 1] |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 901 | values = sorted(values, key=self.cmp_to_key(mycmp)) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 902 | self.assertEqual([int(value) for value in values], |
| 903 | [0, 1, 1, 2, 3, 4, 5, 7, 10]) |
| 904 | |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 905 | def test_hash(self): |
| 906 | def mycmp(x, y): |
| 907 | return y - x |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 908 | key = self.cmp_to_key(mycmp) |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 909 | k = key(10) |
Raymond Hettinger | 7ab9e22 | 2011-04-05 02:33:54 -0700 | [diff] [blame] | 910 | self.assertRaises(TypeError, hash, k) |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 911 | self.assertNotIsInstance(k, collections.abc.Hashable) |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 912 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 913 | |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 914 | @unittest.skipUnless(c_functools, 'requires the C _functools module') |
| 915 | class TestCmpToKeyC(TestCmpToKey, unittest.TestCase): |
| 916 | if c_functools: |
| 917 | cmp_to_key = c_functools.cmp_to_key |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 918 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 919 | |
Serhiy Storchaka | ca4220b | 2013-02-05 22:12:59 +0200 | [diff] [blame] | 920 | class TestCmpToKeyPy(TestCmpToKey, unittest.TestCase): |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 921 | cmp_to_key = staticmethod(py_functools.cmp_to_key) |
| 922 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 923 | |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 924 | class TestTotalOrdering(unittest.TestCase): |
| 925 | |
| 926 | def test_total_ordering_lt(self): |
| 927 | @functools.total_ordering |
| 928 | class A: |
| 929 | def __init__(self, value): |
| 930 | self.value = value |
| 931 | def __lt__(self, other): |
| 932 | return self.value < other.value |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 933 | def __eq__(self, other): |
| 934 | return self.value == other.value |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 935 | self.assertTrue(A(1) < A(2)) |
| 936 | self.assertTrue(A(2) > A(1)) |
| 937 | self.assertTrue(A(1) <= A(2)) |
| 938 | self.assertTrue(A(2) >= A(1)) |
| 939 | self.assertTrue(A(2) <= A(2)) |
| 940 | self.assertTrue(A(2) >= A(2)) |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 941 | self.assertFalse(A(1) > A(2)) |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 942 | |
| 943 | def test_total_ordering_le(self): |
| 944 | @functools.total_ordering |
| 945 | class A: |
| 946 | def __init__(self, value): |
| 947 | self.value = value |
| 948 | def __le__(self, other): |
| 949 | return self.value <= other.value |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 950 | def __eq__(self, other): |
| 951 | return self.value == other.value |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 952 | self.assertTrue(A(1) < A(2)) |
| 953 | self.assertTrue(A(2) > A(1)) |
| 954 | self.assertTrue(A(1) <= A(2)) |
| 955 | self.assertTrue(A(2) >= A(1)) |
| 956 | self.assertTrue(A(2) <= A(2)) |
| 957 | self.assertTrue(A(2) >= A(2)) |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 958 | self.assertFalse(A(1) >= A(2)) |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 959 | |
| 960 | def test_total_ordering_gt(self): |
| 961 | @functools.total_ordering |
| 962 | class A: |
| 963 | def __init__(self, value): |
| 964 | self.value = value |
| 965 | def __gt__(self, other): |
| 966 | return self.value > other.value |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 967 | def __eq__(self, other): |
| 968 | return self.value == other.value |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 969 | self.assertTrue(A(1) < A(2)) |
| 970 | self.assertTrue(A(2) > A(1)) |
| 971 | self.assertTrue(A(1) <= A(2)) |
| 972 | self.assertTrue(A(2) >= A(1)) |
| 973 | self.assertTrue(A(2) <= A(2)) |
| 974 | self.assertTrue(A(2) >= A(2)) |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 975 | self.assertFalse(A(2) < A(1)) |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 976 | |
| 977 | def test_total_ordering_ge(self): |
| 978 | @functools.total_ordering |
| 979 | class A: |
| 980 | def __init__(self, value): |
| 981 | self.value = value |
| 982 | def __ge__(self, other): |
| 983 | return self.value >= other.value |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 984 | def __eq__(self, other): |
| 985 | return self.value == other.value |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 986 | self.assertTrue(A(1) < A(2)) |
| 987 | self.assertTrue(A(2) > A(1)) |
| 988 | self.assertTrue(A(1) <= A(2)) |
| 989 | self.assertTrue(A(2) >= A(1)) |
| 990 | self.assertTrue(A(2) <= A(2)) |
| 991 | self.assertTrue(A(2) >= A(2)) |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 992 | self.assertFalse(A(2) <= A(1)) |
Raymond Hettinger | c50846a | 2010-04-05 18:56:31 +0000 | [diff] [blame] | 993 | |
| 994 | def test_total_ordering_no_overwrite(self): |
| 995 | # new methods should not overwrite existing |
| 996 | @functools.total_ordering |
| 997 | class A(int): |
Benjamin Peterson | 9c2930e | 2010-08-23 17:40:33 +0000 | [diff] [blame] | 998 | pass |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 999 | self.assertTrue(A(1) < A(2)) |
| 1000 | self.assertTrue(A(2) > A(1)) |
| 1001 | self.assertTrue(A(1) <= A(2)) |
| 1002 | self.assertTrue(A(2) >= A(1)) |
| 1003 | self.assertTrue(A(2) <= A(2)) |
| 1004 | self.assertTrue(A(2) >= A(2)) |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 1005 | |
Benjamin Peterson | 42ebee3 | 2010-04-11 01:43:16 +0000 | [diff] [blame] | 1006 | def test_no_operations_defined(self): |
| 1007 | with self.assertRaises(ValueError): |
| 1008 | @functools.total_ordering |
| 1009 | class A: |
| 1010 | pass |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 1011 | |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 1012 | def test_type_error_when_not_implemented(self): |
| 1013 | # bug 10042; ensure stack overflow does not occur |
| 1014 | # when decorated types return NotImplemented |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 1015 | @functools.total_ordering |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 1016 | class ImplementsLessThan: |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 1017 | def __init__(self, value): |
| 1018 | self.value = value |
| 1019 | def __eq__(self, other): |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 1020 | if isinstance(other, ImplementsLessThan): |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 1021 | return self.value == other.value |
| 1022 | return False |
| 1023 | def __lt__(self, other): |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 1024 | if isinstance(other, ImplementsLessThan): |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 1025 | return self.value < other.value |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 1026 | return NotImplemented |
Raymond Hettinger | 23f9fc3 | 2011-01-08 07:01:56 +0000 | [diff] [blame] | 1027 | |
Nick Coghlan | f05d981 | 2013-10-02 00:02:03 +1000 | [diff] [blame] | 1028 | @functools.total_ordering |
| 1029 | class ImplementsGreaterThan: |
| 1030 | def __init__(self, value): |
| 1031 | self.value = value |
| 1032 | def __eq__(self, other): |
| 1033 | if isinstance(other, ImplementsGreaterThan): |
| 1034 | return self.value == other.value |
| 1035 | return False |
| 1036 | def __gt__(self, other): |
| 1037 | if isinstance(other, ImplementsGreaterThan): |
| 1038 | return self.value > other.value |
| 1039 | return NotImplemented |
| 1040 | |
| 1041 | @functools.total_ordering |
| 1042 | class ImplementsLessThanEqualTo: |
| 1043 | def __init__(self, value): |
| 1044 | self.value = value |
| 1045 | def __eq__(self, other): |
| 1046 | if isinstance(other, ImplementsLessThanEqualTo): |
| 1047 | return self.value == other.value |
| 1048 | return False |
| 1049 | def __le__(self, other): |
| 1050 | if isinstance(other, ImplementsLessThanEqualTo): |
| 1051 | return self.value <= other.value |
| 1052 | return NotImplemented |
| 1053 | |
| 1054 | @functools.total_ordering |
| 1055 | class ImplementsGreaterThanEqualTo: |
| 1056 | def __init__(self, value): |
| 1057 | self.value = value |
| 1058 | def __eq__(self, other): |
| 1059 | if isinstance(other, ImplementsGreaterThanEqualTo): |
| 1060 | return self.value == other.value |
| 1061 | return False |
| 1062 | def __ge__(self, other): |
| 1063 | if isinstance(other, ImplementsGreaterThanEqualTo): |
| 1064 | return self.value >= other.value |
| 1065 | return NotImplemented |
| 1066 | |
| 1067 | @functools.total_ordering |
| 1068 | class ComparatorNotImplemented: |
| 1069 | def __init__(self, value): |
| 1070 | self.value = value |
| 1071 | def __eq__(self, other): |
| 1072 | if isinstance(other, ComparatorNotImplemented): |
| 1073 | return self.value == other.value |
| 1074 | return False |
| 1075 | def __lt__(self, other): |
| 1076 | return NotImplemented |
| 1077 | |
| 1078 | with self.subTest("LT < 1"), self.assertRaises(TypeError): |
| 1079 | ImplementsLessThan(-1) < 1 |
| 1080 | |
| 1081 | with self.subTest("LT < LE"), self.assertRaises(TypeError): |
| 1082 | ImplementsLessThan(0) < ImplementsLessThanEqualTo(0) |
| 1083 | |
| 1084 | with self.subTest("LT < GT"), self.assertRaises(TypeError): |
| 1085 | ImplementsLessThan(1) < ImplementsGreaterThan(1) |
| 1086 | |
| 1087 | with self.subTest("LE <= LT"), self.assertRaises(TypeError): |
| 1088 | ImplementsLessThanEqualTo(2) <= ImplementsLessThan(2) |
| 1089 | |
| 1090 | with self.subTest("LE <= GE"), self.assertRaises(TypeError): |
| 1091 | ImplementsLessThanEqualTo(3) <= ImplementsGreaterThanEqualTo(3) |
| 1092 | |
| 1093 | with self.subTest("GT > GE"), self.assertRaises(TypeError): |
| 1094 | ImplementsGreaterThan(4) > ImplementsGreaterThanEqualTo(4) |
| 1095 | |
| 1096 | with self.subTest("GT > LT"), self.assertRaises(TypeError): |
| 1097 | ImplementsGreaterThan(5) > ImplementsLessThan(5) |
| 1098 | |
| 1099 | with self.subTest("GE >= GT"), self.assertRaises(TypeError): |
| 1100 | ImplementsGreaterThanEqualTo(6) >= ImplementsGreaterThan(6) |
| 1101 | |
| 1102 | with self.subTest("GE >= LE"), self.assertRaises(TypeError): |
| 1103 | ImplementsGreaterThanEqualTo(7) >= ImplementsLessThanEqualTo(7) |
| 1104 | |
| 1105 | with self.subTest("GE when equal"): |
| 1106 | a = ComparatorNotImplemented(8) |
| 1107 | b = ComparatorNotImplemented(8) |
| 1108 | self.assertEqual(a, b) |
| 1109 | with self.assertRaises(TypeError): |
| 1110 | a >= b |
| 1111 | |
| 1112 | with self.subTest("LE when equal"): |
| 1113 | a = ComparatorNotImplemented(9) |
| 1114 | b = ComparatorNotImplemented(9) |
| 1115 | self.assertEqual(a, b) |
| 1116 | with self.assertRaises(TypeError): |
| 1117 | a <= b |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1118 | |
Serhiy Storchaka | 697a526 | 2015-01-01 15:23:12 +0200 | [diff] [blame] | 1119 | def test_pickle(self): |
Serhiy Storchaka | 92bb90a | 2016-09-22 11:39:25 +0300 | [diff] [blame] | 1120 | for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
Serhiy Storchaka | 697a526 | 2015-01-01 15:23:12 +0200 | [diff] [blame] | 1121 | for name in '__lt__', '__gt__', '__le__', '__ge__': |
| 1122 | with self.subTest(method=name, proto=proto): |
| 1123 | method = getattr(Orderable_LT, name) |
| 1124 | method_copy = pickle.loads(pickle.dumps(method, proto)) |
| 1125 | self.assertIs(method_copy, method) |
| 1126 | |
| 1127 | @functools.total_ordering |
| 1128 | class Orderable_LT: |
| 1129 | def __init__(self, value): |
| 1130 | self.value = value |
| 1131 | def __lt__(self, other): |
| 1132 | return self.value < other.value |
| 1133 | def __eq__(self, other): |
| 1134 | return self.value == other.value |
| 1135 | |
| 1136 | |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1137 | class TestLRU: |
Georg Brandl | 2e7346a | 2010-07-31 18:09:23 +0000 | [diff] [blame] | 1138 | |
| 1139 | def test_lru(self): |
| 1140 | def orig(x, y): |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1141 | return 3 * x + y |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1142 | f = self.module.lru_cache(maxsize=20)(orig) |
Raymond Hettinger | 7496b41 | 2010-11-30 19:15:45 +0000 | [diff] [blame] | 1143 | hits, misses, maxsize, currsize = f.cache_info() |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1144 | self.assertEqual(maxsize, 20) |
| 1145 | self.assertEqual(currsize, 0) |
| 1146 | self.assertEqual(hits, 0) |
| 1147 | self.assertEqual(misses, 0) |
Georg Brandl | 2e7346a | 2010-07-31 18:09:23 +0000 | [diff] [blame] | 1148 | |
| 1149 | domain = range(5) |
| 1150 | for i in range(1000): |
| 1151 | x, y = choice(domain), choice(domain) |
| 1152 | actual = f(x, y) |
| 1153 | expected = orig(x, y) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 1154 | self.assertEqual(actual, expected) |
Raymond Hettinger | 7496b41 | 2010-11-30 19:15:45 +0000 | [diff] [blame] | 1155 | hits, misses, maxsize, currsize = f.cache_info() |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1156 | self.assertTrue(hits > misses) |
| 1157 | self.assertEqual(hits + misses, 1000) |
| 1158 | self.assertEqual(currsize, 20) |
Georg Brandl | 2e7346a | 2010-07-31 18:09:23 +0000 | [diff] [blame] | 1159 | |
Raymond Hettinger | 02566ec | 2010-09-04 22:46:06 +0000 | [diff] [blame] | 1160 | f.cache_clear() # test clearing |
Raymond Hettinger | 7496b41 | 2010-11-30 19:15:45 +0000 | [diff] [blame] | 1161 | hits, misses, maxsize, currsize = f.cache_info() |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1162 | self.assertEqual(hits, 0) |
| 1163 | self.assertEqual(misses, 0) |
| 1164 | self.assertEqual(currsize, 0) |
Georg Brandl | 2e7346a | 2010-07-31 18:09:23 +0000 | [diff] [blame] | 1165 | f(x, y) |
Raymond Hettinger | 7496b41 | 2010-11-30 19:15:45 +0000 | [diff] [blame] | 1166 | hits, misses, maxsize, currsize = f.cache_info() |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1167 | self.assertEqual(hits, 0) |
| 1168 | self.assertEqual(misses, 1) |
| 1169 | self.assertEqual(currsize, 1) |
Georg Brandl | 2e7346a | 2010-07-31 18:09:23 +0000 | [diff] [blame] | 1170 | |
Nick Coghlan | 9887683 | 2010-08-17 06:17:18 +0000 | [diff] [blame] | 1171 | # Test bypassing the cache |
| 1172 | self.assertIs(f.__wrapped__, orig) |
| 1173 | f.__wrapped__(x, y) |
Raymond Hettinger | 7496b41 | 2010-11-30 19:15:45 +0000 | [diff] [blame] | 1174 | hits, misses, maxsize, currsize = f.cache_info() |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1175 | self.assertEqual(hits, 0) |
| 1176 | self.assertEqual(misses, 1) |
| 1177 | self.assertEqual(currsize, 1) |
Nick Coghlan | 9887683 | 2010-08-17 06:17:18 +0000 | [diff] [blame] | 1178 | |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1179 | # test size zero (which means "never-cache") |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1180 | @self.module.lru_cache(0) |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1181 | def f(): |
| 1182 | nonlocal f_cnt |
| 1183 | f_cnt += 1 |
| 1184 | return 20 |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1185 | self.assertEqual(f.cache_info().maxsize, 0) |
Raymond Hettinger | f309828 | 2010-08-15 03:30:45 +0000 | [diff] [blame] | 1186 | f_cnt = 0 |
| 1187 | for i in range(5): |
| 1188 | self.assertEqual(f(), 20) |
| 1189 | self.assertEqual(f_cnt, 5) |
Raymond Hettinger | 7496b41 | 2010-11-30 19:15:45 +0000 | [diff] [blame] | 1190 | hits, misses, maxsize, currsize = f.cache_info() |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1191 | self.assertEqual(hits, 0) |
| 1192 | self.assertEqual(misses, 5) |
| 1193 | self.assertEqual(currsize, 0) |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1194 | |
| 1195 | # test size one |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1196 | @self.module.lru_cache(1) |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1197 | def f(): |
| 1198 | nonlocal f_cnt |
| 1199 | f_cnt += 1 |
| 1200 | return 20 |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1201 | self.assertEqual(f.cache_info().maxsize, 1) |
Raymond Hettinger | f309828 | 2010-08-15 03:30:45 +0000 | [diff] [blame] | 1202 | f_cnt = 0 |
| 1203 | for i in range(5): |
| 1204 | self.assertEqual(f(), 20) |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1205 | self.assertEqual(f_cnt, 1) |
Raymond Hettinger | 7496b41 | 2010-11-30 19:15:45 +0000 | [diff] [blame] | 1206 | hits, misses, maxsize, currsize = f.cache_info() |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1207 | self.assertEqual(hits, 4) |
| 1208 | self.assertEqual(misses, 1) |
| 1209 | self.assertEqual(currsize, 1) |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1210 | |
Raymond Hettinger | f309828 | 2010-08-15 03:30:45 +0000 | [diff] [blame] | 1211 | # test size two |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1212 | @self.module.lru_cache(2) |
Raymond Hettinger | f309828 | 2010-08-15 03:30:45 +0000 | [diff] [blame] | 1213 | def f(x): |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1214 | nonlocal f_cnt |
| 1215 | f_cnt += 1 |
Raymond Hettinger | f309828 | 2010-08-15 03:30:45 +0000 | [diff] [blame] | 1216 | return x*10 |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1217 | self.assertEqual(f.cache_info().maxsize, 2) |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1218 | f_cnt = 0 |
Raymond Hettinger | f309828 | 2010-08-15 03:30:45 +0000 | [diff] [blame] | 1219 | for x in 7, 9, 7, 9, 7, 9, 8, 8, 8, 9, 9, 9, 8, 8, 8, 7: |
| 1220 | # * * * * |
| 1221 | self.assertEqual(f(x), x*10) |
| 1222 | self.assertEqual(f_cnt, 4) |
Raymond Hettinger | 7496b41 | 2010-11-30 19:15:45 +0000 | [diff] [blame] | 1223 | hits, misses, maxsize, currsize = f.cache_info() |
Nick Coghlan | 234515a | 2010-11-30 06:19:46 +0000 | [diff] [blame] | 1224 | self.assertEqual(hits, 12) |
| 1225 | self.assertEqual(misses, 4) |
| 1226 | self.assertEqual(currsize, 2) |
Raymond Hettinger | 0f56e90 | 2010-08-14 23:52:08 +0000 | [diff] [blame] | 1227 | |
Raymond Hettinger | d191ef2 | 2017-01-07 20:44:48 -0800 | [diff] [blame] | 1228 | def test_lru_hash_only_once(self): |
| 1229 | # To protect against weird reentrancy bugs and to improve |
| 1230 | # efficiency when faced with slow __hash__ methods, the |
| 1231 | # LRU cache guarantees that it will only call __hash__ |
| 1232 | # only once per use as an argument to the cached function. |
| 1233 | |
| 1234 | @self.module.lru_cache(maxsize=1) |
| 1235 | def f(x, y): |
| 1236 | return x * 3 + y |
| 1237 | |
| 1238 | # Simulate the integer 5 |
| 1239 | mock_int = unittest.mock.Mock() |
| 1240 | mock_int.__mul__ = unittest.mock.Mock(return_value=15) |
| 1241 | mock_int.__hash__ = unittest.mock.Mock(return_value=999) |
| 1242 | |
| 1243 | # Add to cache: One use as an argument gives one call |
Raymond Hettinger | 5eed36f | 2017-01-07 20:53:09 -0800 | [diff] [blame] | 1244 | self.assertEqual(f(mock_int, 1), 16) |
| 1245 | self.assertEqual(mock_int.__hash__.call_count, 1) |
| 1246 | self.assertEqual(f.cache_info(), (0, 1, 1, 1)) |
Raymond Hettinger | d191ef2 | 2017-01-07 20:44:48 -0800 | [diff] [blame] | 1247 | |
| 1248 | # Cache hit: One use as an argument gives one additional call |
Raymond Hettinger | 5eed36f | 2017-01-07 20:53:09 -0800 | [diff] [blame] | 1249 | self.assertEqual(f(mock_int, 1), 16) |
| 1250 | self.assertEqual(mock_int.__hash__.call_count, 2) |
| 1251 | self.assertEqual(f.cache_info(), (1, 1, 1, 1)) |
Raymond Hettinger | d191ef2 | 2017-01-07 20:44:48 -0800 | [diff] [blame] | 1252 | |
Ville Skyttä | 49b2734 | 2017-08-03 09:00:59 +0300 | [diff] [blame] | 1253 | # Cache eviction: No use as an argument gives no additional call |
Raymond Hettinger | 5eed36f | 2017-01-07 20:53:09 -0800 | [diff] [blame] | 1254 | self.assertEqual(f(6, 2), 20) |
| 1255 | self.assertEqual(mock_int.__hash__.call_count, 2) |
| 1256 | self.assertEqual(f.cache_info(), (1, 2, 1, 1)) |
Raymond Hettinger | d191ef2 | 2017-01-07 20:44:48 -0800 | [diff] [blame] | 1257 | |
| 1258 | # Cache miss: One use as an argument gives one additional call |
Raymond Hettinger | 5eed36f | 2017-01-07 20:53:09 -0800 | [diff] [blame] | 1259 | self.assertEqual(f(mock_int, 1), 16) |
| 1260 | self.assertEqual(mock_int.__hash__.call_count, 3) |
| 1261 | self.assertEqual(f.cache_info(), (1, 3, 1, 1)) |
Raymond Hettinger | d191ef2 | 2017-01-07 20:44:48 -0800 | [diff] [blame] | 1262 | |
Raymond Hettinger | af56e0e | 2016-12-16 13:57:40 -0800 | [diff] [blame] | 1263 | def test_lru_reentrancy_with_len(self): |
| 1264 | # Test to make sure the LRU cache code isn't thrown-off by |
| 1265 | # caching the built-in len() function. Since len() can be |
| 1266 | # cached, we shouldn't use it inside the lru code itself. |
| 1267 | old_len = builtins.len |
| 1268 | try: |
| 1269 | builtins.len = self.module.lru_cache(4)(len) |
| 1270 | for i in [0, 0, 1, 2, 3, 3, 4, 5, 6, 1, 7, 2, 1]: |
| 1271 | self.assertEqual(len('abcdefghijklmn'[:i]), i) |
| 1272 | finally: |
| 1273 | builtins.len = old_len |
| 1274 | |
Raymond Hettinger | 605a447 | 2017-01-09 07:50:19 -0800 | [diff] [blame] | 1275 | def test_lru_star_arg_handling(self): |
| 1276 | # Test regression that arose in ea064ff3c10f |
| 1277 | @functools.lru_cache() |
| 1278 | def f(*args): |
| 1279 | return args |
| 1280 | |
| 1281 | self.assertEqual(f(1, 2), (1, 2)) |
| 1282 | self.assertEqual(f((1, 2)), ((1, 2),)) |
| 1283 | |
Yury Selivanov | 46a02db | 2016-11-09 18:55:45 -0500 | [diff] [blame] | 1284 | def test_lru_type_error(self): |
| 1285 | # Regression test for issue #28653. |
| 1286 | # lru_cache was leaking when one of the arguments |
| 1287 | # wasn't cacheable. |
| 1288 | |
| 1289 | @functools.lru_cache(maxsize=None) |
| 1290 | def infinite_cache(o): |
| 1291 | pass |
| 1292 | |
| 1293 | @functools.lru_cache(maxsize=10) |
| 1294 | def limited_cache(o): |
| 1295 | pass |
| 1296 | |
| 1297 | with self.assertRaises(TypeError): |
| 1298 | infinite_cache([]) |
| 1299 | |
| 1300 | with self.assertRaises(TypeError): |
| 1301 | limited_cache([]) |
| 1302 | |
Raymond Hettinger | c79fb0e | 2010-12-01 03:45:41 +0000 | [diff] [blame] | 1303 | def test_lru_with_maxsize_none(self): |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1304 | @self.module.lru_cache(maxsize=None) |
Raymond Hettinger | c79fb0e | 2010-12-01 03:45:41 +0000 | [diff] [blame] | 1305 | def fib(n): |
| 1306 | if n < 2: |
| 1307 | return n |
| 1308 | return fib(n-1) + fib(n-2) |
| 1309 | self.assertEqual([fib(n) for n in range(16)], |
| 1310 | [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610]) |
| 1311 | self.assertEqual(fib.cache_info(), |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1312 | self.module._CacheInfo(hits=28, misses=16, maxsize=None, currsize=16)) |
Raymond Hettinger | c79fb0e | 2010-12-01 03:45:41 +0000 | [diff] [blame] | 1313 | fib.cache_clear() |
| 1314 | self.assertEqual(fib.cache_info(), |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1315 | self.module._CacheInfo(hits=0, misses=0, maxsize=None, currsize=0)) |
| 1316 | |
| 1317 | def test_lru_with_maxsize_negative(self): |
| 1318 | @self.module.lru_cache(maxsize=-10) |
| 1319 | def eq(n): |
| 1320 | return n |
| 1321 | for i in (0, 1): |
| 1322 | self.assertEqual([eq(n) for n in range(150)], list(range(150))) |
| 1323 | self.assertEqual(eq.cache_info(), |
| 1324 | self.module._CacheInfo(hits=0, misses=300, maxsize=-10, currsize=1)) |
Raymond Hettinger | c79fb0e | 2010-12-01 03:45:41 +0000 | [diff] [blame] | 1325 | |
Raymond Hettinger | 4b779b3 | 2011-10-15 23:50:42 -0700 | [diff] [blame] | 1326 | def test_lru_with_exceptions(self): |
| 1327 | # Verify that user_function exceptions get passed through without |
| 1328 | # creating a hard-to-read chained exception. |
| 1329 | # http://bugs.python.org/issue13177 |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1330 | for maxsize in (None, 128): |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1331 | @self.module.lru_cache(maxsize) |
Raymond Hettinger | 4b779b3 | 2011-10-15 23:50:42 -0700 | [diff] [blame] | 1332 | def func(i): |
| 1333 | return 'abc'[i] |
| 1334 | self.assertEqual(func(0), 'a') |
| 1335 | with self.assertRaises(IndexError) as cm: |
| 1336 | func(15) |
| 1337 | self.assertIsNone(cm.exception.__context__) |
| 1338 | # Verify that the previous exception did not result in a cached entry |
| 1339 | with self.assertRaises(IndexError): |
| 1340 | func(15) |
| 1341 | |
Raymond Hettinger | cd9fdfd | 2011-10-20 08:57:45 -0700 | [diff] [blame] | 1342 | def test_lru_with_types(self): |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1343 | for maxsize in (None, 128): |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1344 | @self.module.lru_cache(maxsize=maxsize, typed=True) |
Raymond Hettinger | cd9fdfd | 2011-10-20 08:57:45 -0700 | [diff] [blame] | 1345 | def square(x): |
| 1346 | return x * x |
| 1347 | self.assertEqual(square(3), 9) |
| 1348 | self.assertEqual(type(square(3)), type(9)) |
| 1349 | self.assertEqual(square(3.0), 9.0) |
| 1350 | self.assertEqual(type(square(3.0)), type(9.0)) |
| 1351 | self.assertEqual(square(x=3), 9) |
| 1352 | self.assertEqual(type(square(x=3)), type(9)) |
| 1353 | self.assertEqual(square(x=3.0), 9.0) |
| 1354 | self.assertEqual(type(square(x=3.0)), type(9.0)) |
| 1355 | self.assertEqual(square.cache_info().hits, 4) |
| 1356 | self.assertEqual(square.cache_info().misses, 4) |
| 1357 | |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1358 | def test_lru_with_keyword_args(self): |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1359 | @self.module.lru_cache() |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1360 | def fib(n): |
| 1361 | if n < 2: |
| 1362 | return n |
| 1363 | return fib(n=n-1) + fib(n=n-2) |
| 1364 | self.assertEqual( |
| 1365 | [fib(n=number) for number in range(16)], |
| 1366 | [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610] |
| 1367 | ) |
| 1368 | self.assertEqual(fib.cache_info(), |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1369 | self.module._CacheInfo(hits=28, misses=16, maxsize=128, currsize=16)) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1370 | fib.cache_clear() |
| 1371 | self.assertEqual(fib.cache_info(), |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1372 | self.module._CacheInfo(hits=0, misses=0, maxsize=128, currsize=0)) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1373 | |
| 1374 | def test_lru_with_keyword_args_maxsize_none(self): |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1375 | @self.module.lru_cache(maxsize=None) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1376 | def fib(n): |
| 1377 | if n < 2: |
| 1378 | return n |
| 1379 | return fib(n=n-1) + fib(n=n-2) |
| 1380 | self.assertEqual([fib(n=number) for number in range(16)], |
| 1381 | [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610]) |
| 1382 | self.assertEqual(fib.cache_info(), |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1383 | self.module._CacheInfo(hits=28, misses=16, maxsize=None, currsize=16)) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1384 | fib.cache_clear() |
| 1385 | self.assertEqual(fib.cache_info(), |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1386 | self.module._CacheInfo(hits=0, misses=0, maxsize=None, currsize=0)) |
| 1387 | |
Raymond Hettinger | 4ee3914 | 2017-01-08 17:28:20 -0800 | [diff] [blame] | 1388 | def test_kwargs_order(self): |
| 1389 | # PEP 468: Preserving Keyword Argument Order |
| 1390 | @self.module.lru_cache(maxsize=10) |
| 1391 | def f(**kwargs): |
| 1392 | return list(kwargs.items()) |
| 1393 | self.assertEqual(f(a=1, b=2), [('a', 1), ('b', 2)]) |
| 1394 | self.assertEqual(f(b=2, a=1), [('b', 2), ('a', 1)]) |
| 1395 | self.assertEqual(f.cache_info(), |
| 1396 | self.module._CacheInfo(hits=0, misses=2, maxsize=10, currsize=2)) |
| 1397 | |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1398 | def test_lru_cache_decoration(self): |
| 1399 | def f(zomg: 'zomg_annotation'): |
| 1400 | """f doc string""" |
| 1401 | return 42 |
| 1402 | g = self.module.lru_cache()(f) |
| 1403 | for attr in self.module.WRAPPER_ASSIGNMENTS: |
| 1404 | self.assertEqual(getattr(g, attr), getattr(f, attr)) |
| 1405 | |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1406 | def test_lru_cache_threaded(self): |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1407 | n, m = 5, 11 |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1408 | def orig(x, y): |
| 1409 | return 3 * x + y |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1410 | f = self.module.lru_cache(maxsize=n*m)(orig) |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1411 | hits, misses, maxsize, currsize = f.cache_info() |
| 1412 | self.assertEqual(currsize, 0) |
| 1413 | |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1414 | start = threading.Event() |
Serhiy Storchaka | 391af75 | 2015-06-08 12:44:18 +0300 | [diff] [blame] | 1415 | def full(k): |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1416 | start.wait(10) |
| 1417 | for _ in range(m): |
Serhiy Storchaka | 391af75 | 2015-06-08 12:44:18 +0300 | [diff] [blame] | 1418 | self.assertEqual(f(k, 0), orig(k, 0)) |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1419 | |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1420 | def clear(): |
| 1421 | start.wait(10) |
| 1422 | for _ in range(2*m): |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1423 | f.cache_clear() |
| 1424 | |
| 1425 | orig_si = sys.getswitchinterval() |
Xavier de Gaye | 7522ef4 | 2016-12-08 11:06:56 +0100 | [diff] [blame] | 1426 | support.setswitchinterval(1e-6) |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1427 | try: |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1428 | # create n threads in order to fill cache |
Serhiy Storchaka | 391af75 | 2015-06-08 12:44:18 +0300 | [diff] [blame] | 1429 | threads = [threading.Thread(target=full, args=[k]) |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1430 | for k in range(n)] |
Serhiy Storchaka | bf2b3b7 | 2015-05-30 15:49:17 +0300 | [diff] [blame] | 1431 | with support.start_threads(threads): |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1432 | start.set() |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1433 | |
| 1434 | hits, misses, maxsize, currsize = f.cache_info() |
Serhiy Storchaka | 391af75 | 2015-06-08 12:44:18 +0300 | [diff] [blame] | 1435 | if self.module is py_functools: |
| 1436 | # XXX: Why can be not equal? |
| 1437 | self.assertLessEqual(misses, n) |
| 1438 | self.assertLessEqual(hits, m*n - misses) |
| 1439 | else: |
| 1440 | self.assertEqual(misses, n) |
| 1441 | self.assertEqual(hits, m*n - misses) |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1442 | self.assertEqual(currsize, n) |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1443 | |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1444 | # create n threads in order to fill cache and 1 to clear it |
| 1445 | threads = [threading.Thread(target=clear)] |
Serhiy Storchaka | 391af75 | 2015-06-08 12:44:18 +0300 | [diff] [blame] | 1446 | threads += [threading.Thread(target=full, args=[k]) |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1447 | for k in range(n)] |
| 1448 | start.clear() |
Serhiy Storchaka | bf2b3b7 | 2015-05-30 15:49:17 +0300 | [diff] [blame] | 1449 | with support.start_threads(threads): |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1450 | start.set() |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1451 | finally: |
| 1452 | sys.setswitchinterval(orig_si) |
Antoine Pitrou | b5b3714 | 2012-11-13 21:35:40 +0100 | [diff] [blame] | 1453 | |
Serhiy Storchaka | 77cb197 | 2015-06-08 11:14:31 +0300 | [diff] [blame] | 1454 | def test_lru_cache_threaded2(self): |
| 1455 | # Simultaneous call with the same arguments |
| 1456 | n, m = 5, 7 |
| 1457 | start = threading.Barrier(n+1) |
| 1458 | pause = threading.Barrier(n+1) |
| 1459 | stop = threading.Barrier(n+1) |
| 1460 | @self.module.lru_cache(maxsize=m*n) |
| 1461 | def f(x): |
| 1462 | pause.wait(10) |
| 1463 | return 3 * x |
| 1464 | self.assertEqual(f.cache_info(), (0, 0, m*n, 0)) |
| 1465 | def test(): |
| 1466 | for i in range(m): |
| 1467 | start.wait(10) |
| 1468 | self.assertEqual(f(i), 3 * i) |
| 1469 | stop.wait(10) |
| 1470 | threads = [threading.Thread(target=test) for k in range(n)] |
| 1471 | with support.start_threads(threads): |
| 1472 | for i in range(m): |
| 1473 | start.wait(10) |
| 1474 | stop.reset() |
| 1475 | pause.wait(10) |
| 1476 | start.reset() |
| 1477 | stop.wait(10) |
| 1478 | pause.reset() |
| 1479 | self.assertEqual(f.cache_info(), (0, (i+1)*n, m*n, i+1)) |
| 1480 | |
Serhiy Storchaka | 6779652 | 2017-01-12 18:34:33 +0200 | [diff] [blame] | 1481 | def test_lru_cache_threaded3(self): |
| 1482 | @self.module.lru_cache(maxsize=2) |
| 1483 | def f(x): |
| 1484 | time.sleep(.01) |
| 1485 | return 3 * x |
| 1486 | def test(i, x): |
| 1487 | with self.subTest(thread=i): |
| 1488 | self.assertEqual(f(x), 3 * x, i) |
| 1489 | threads = [threading.Thread(target=test, args=(i, v)) |
| 1490 | for i, v in enumerate([1, 2, 2, 3, 2])] |
| 1491 | with support.start_threads(threads): |
| 1492 | pass |
| 1493 | |
Raymond Hettinger | 0392342 | 2013-03-04 02:52:50 -0500 | [diff] [blame] | 1494 | def test_need_for_rlock(self): |
| 1495 | # This will deadlock on an LRU cache that uses a regular lock |
| 1496 | |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1497 | @self.module.lru_cache(maxsize=10) |
Raymond Hettinger | 0392342 | 2013-03-04 02:52:50 -0500 | [diff] [blame] | 1498 | def test_func(x): |
| 1499 | 'Used to demonstrate a reentrant lru_cache call within a single thread' |
| 1500 | return x |
| 1501 | |
| 1502 | class DoubleEq: |
| 1503 | 'Demonstrate a reentrant lru_cache call within a single thread' |
| 1504 | def __init__(self, x): |
| 1505 | self.x = x |
| 1506 | def __hash__(self): |
| 1507 | return self.x |
| 1508 | def __eq__(self, other): |
| 1509 | if self.x == 2: |
| 1510 | test_func(DoubleEq(1)) |
| 1511 | return self.x == other.x |
| 1512 | |
| 1513 | test_func(DoubleEq(1)) # Load the cache |
| 1514 | test_func(DoubleEq(2)) # Load the cache |
| 1515 | self.assertEqual(test_func(DoubleEq(2)), # Trigger a re-entrant __eq__ call |
| 1516 | DoubleEq(2)) # Verify the correct return value |
| 1517 | |
Raymond Hettinger | 4d58897 | 2014-08-12 12:44:52 -0700 | [diff] [blame] | 1518 | def test_early_detection_of_bad_call(self): |
| 1519 | # Issue #22184 |
| 1520 | with self.assertRaises(TypeError): |
| 1521 | @functools.lru_cache |
| 1522 | def f(): |
| 1523 | pass |
| 1524 | |
Serhiy Storchaka | e7070f0 | 2015-06-08 11:19:24 +0300 | [diff] [blame] | 1525 | def test_lru_method(self): |
| 1526 | class X(int): |
| 1527 | f_cnt = 0 |
| 1528 | @self.module.lru_cache(2) |
| 1529 | def f(self, x): |
| 1530 | self.f_cnt += 1 |
| 1531 | return x*10+self |
| 1532 | a = X(5) |
| 1533 | b = X(5) |
| 1534 | c = X(7) |
| 1535 | self.assertEqual(X.f.cache_info(), (0, 0, 2, 0)) |
| 1536 | |
| 1537 | for x in 1, 2, 2, 3, 1, 1, 1, 2, 3, 3: |
| 1538 | self.assertEqual(a.f(x), x*10 + 5) |
| 1539 | self.assertEqual((a.f_cnt, b.f_cnt, c.f_cnt), (6, 0, 0)) |
| 1540 | self.assertEqual(X.f.cache_info(), (4, 6, 2, 2)) |
| 1541 | |
| 1542 | for x in 1, 2, 1, 1, 1, 1, 3, 2, 2, 2: |
| 1543 | self.assertEqual(b.f(x), x*10 + 5) |
| 1544 | self.assertEqual((a.f_cnt, b.f_cnt, c.f_cnt), (6, 4, 0)) |
| 1545 | self.assertEqual(X.f.cache_info(), (10, 10, 2, 2)) |
| 1546 | |
| 1547 | for x in 2, 1, 1, 1, 1, 2, 1, 3, 2, 1: |
| 1548 | self.assertEqual(c.f(x), x*10 + 7) |
| 1549 | self.assertEqual((a.f_cnt, b.f_cnt, c.f_cnt), (6, 4, 5)) |
| 1550 | self.assertEqual(X.f.cache_info(), (15, 15, 2, 2)) |
| 1551 | |
| 1552 | self.assertEqual(a.f.cache_info(), X.f.cache_info()) |
| 1553 | self.assertEqual(b.f.cache_info(), X.f.cache_info()) |
| 1554 | self.assertEqual(c.f.cache_info(), X.f.cache_info()) |
| 1555 | |
Serhiy Storchaka | 45120f2 | 2015-10-24 09:49:56 +0300 | [diff] [blame] | 1556 | def test_pickle(self): |
| 1557 | cls = self.__class__ |
| 1558 | for f in cls.cached_func[0], cls.cached_meth, cls.cached_staticmeth: |
| 1559 | for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| 1560 | with self.subTest(proto=proto, func=f): |
| 1561 | f_copy = pickle.loads(pickle.dumps(f, proto)) |
| 1562 | self.assertIs(f_copy, f) |
| 1563 | |
| 1564 | def test_copy(self): |
| 1565 | cls = self.__class__ |
Serhiy Storchaka | e4d65e3 | 2015-12-28 23:58:07 +0200 | [diff] [blame] | 1566 | def orig(x, y): |
| 1567 | return 3 * x + y |
| 1568 | part = self.module.partial(orig, 2) |
| 1569 | funcs = (cls.cached_func[0], cls.cached_meth, cls.cached_staticmeth, |
| 1570 | self.module.lru_cache(2)(part)) |
| 1571 | for f in funcs: |
Serhiy Storchaka | 45120f2 | 2015-10-24 09:49:56 +0300 | [diff] [blame] | 1572 | with self.subTest(func=f): |
| 1573 | f_copy = copy.copy(f) |
| 1574 | self.assertIs(f_copy, f) |
| 1575 | |
| 1576 | def test_deepcopy(self): |
| 1577 | cls = self.__class__ |
Serhiy Storchaka | e4d65e3 | 2015-12-28 23:58:07 +0200 | [diff] [blame] | 1578 | def orig(x, y): |
| 1579 | return 3 * x + y |
| 1580 | part = self.module.partial(orig, 2) |
| 1581 | funcs = (cls.cached_func[0], cls.cached_meth, cls.cached_staticmeth, |
| 1582 | self.module.lru_cache(2)(part)) |
| 1583 | for f in funcs: |
Serhiy Storchaka | 45120f2 | 2015-10-24 09:49:56 +0300 | [diff] [blame] | 1584 | with self.subTest(func=f): |
| 1585 | f_copy = copy.deepcopy(f) |
| 1586 | self.assertIs(f_copy, f) |
| 1587 | |
| 1588 | |
| 1589 | @py_functools.lru_cache() |
| 1590 | def py_cached_func(x, y): |
| 1591 | return 3 * x + y |
| 1592 | |
| 1593 | @c_functools.lru_cache() |
| 1594 | def c_cached_func(x, y): |
| 1595 | return 3 * x + y |
| 1596 | |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1597 | |
| 1598 | class TestLRUPy(TestLRU, unittest.TestCase): |
| 1599 | module = py_functools |
Serhiy Storchaka | 45120f2 | 2015-10-24 09:49:56 +0300 | [diff] [blame] | 1600 | cached_func = py_cached_func, |
| 1601 | |
| 1602 | @module.lru_cache() |
| 1603 | def cached_meth(self, x, y): |
| 1604 | return 3 * x + y |
| 1605 | |
| 1606 | @staticmethod |
| 1607 | @module.lru_cache() |
| 1608 | def cached_staticmeth(x, y): |
| 1609 | return 3 * x + y |
| 1610 | |
| 1611 | |
| 1612 | class TestLRUC(TestLRU, unittest.TestCase): |
| 1613 | module = c_functools |
| 1614 | cached_func = c_cached_func, |
| 1615 | |
| 1616 | @module.lru_cache() |
| 1617 | def cached_meth(self, x, y): |
| 1618 | return 3 * x + y |
| 1619 | |
| 1620 | @staticmethod |
| 1621 | @module.lru_cache() |
| 1622 | def cached_staticmeth(x, y): |
| 1623 | return 3 * x + y |
Serhiy Storchaka | 46c5611 | 2015-05-24 21:53:49 +0300 | [diff] [blame] | 1624 | |
Raymond Hettinger | 0392342 | 2013-03-04 02:52:50 -0500 | [diff] [blame] | 1625 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1626 | class TestSingleDispatch(unittest.TestCase): |
| 1627 | def test_simple_overloads(self): |
| 1628 | @functools.singledispatch |
| 1629 | def g(obj): |
| 1630 | return "base" |
| 1631 | def g_int(i): |
| 1632 | return "integer" |
| 1633 | g.register(int, g_int) |
| 1634 | self.assertEqual(g("str"), "base") |
| 1635 | self.assertEqual(g(1), "integer") |
| 1636 | self.assertEqual(g([1,2,3]), "base") |
| 1637 | |
| 1638 | def test_mro(self): |
| 1639 | @functools.singledispatch |
| 1640 | def g(obj): |
| 1641 | return "base" |
Łukasz Langa | 7f7a67a | 2013-06-07 22:25:27 +0200 | [diff] [blame] | 1642 | class A: |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1643 | pass |
Łukasz Langa | 7f7a67a | 2013-06-07 22:25:27 +0200 | [diff] [blame] | 1644 | class C(A): |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1645 | pass |
Łukasz Langa | 7f7a67a | 2013-06-07 22:25:27 +0200 | [diff] [blame] | 1646 | class B(A): |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1647 | pass |
Łukasz Langa | 7f7a67a | 2013-06-07 22:25:27 +0200 | [diff] [blame] | 1648 | class D(C, B): |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1649 | pass |
Łukasz Langa | 7f7a67a | 2013-06-07 22:25:27 +0200 | [diff] [blame] | 1650 | def g_A(a): |
| 1651 | return "A" |
| 1652 | def g_B(b): |
| 1653 | return "B" |
| 1654 | g.register(A, g_A) |
| 1655 | g.register(B, g_B) |
| 1656 | self.assertEqual(g(A()), "A") |
| 1657 | self.assertEqual(g(B()), "B") |
| 1658 | self.assertEqual(g(C()), "A") |
| 1659 | self.assertEqual(g(D()), "B") |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1660 | |
| 1661 | def test_register_decorator(self): |
| 1662 | @functools.singledispatch |
| 1663 | def g(obj): |
| 1664 | return "base" |
| 1665 | @g.register(int) |
| 1666 | def g_int(i): |
| 1667 | return "int %s" % (i,) |
| 1668 | self.assertEqual(g(""), "base") |
| 1669 | self.assertEqual(g(12), "int 12") |
| 1670 | self.assertIs(g.dispatch(int), g_int) |
| 1671 | self.assertIs(g.dispatch(object), g.dispatch(str)) |
| 1672 | # Note: in the assert above this is not g. |
| 1673 | # @singledispatch returns the wrapper. |
| 1674 | |
| 1675 | def test_wrapping_attributes(self): |
| 1676 | @functools.singledispatch |
| 1677 | def g(obj): |
| 1678 | "Simple test" |
| 1679 | return "Test" |
| 1680 | self.assertEqual(g.__name__, "g") |
Serhiy Storchaka | b12cb6a | 2013-12-08 18:16:18 +0200 | [diff] [blame] | 1681 | if sys.flags.optimize < 2: |
| 1682 | self.assertEqual(g.__doc__, "Simple test") |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1683 | |
| 1684 | @unittest.skipUnless(decimal, 'requires _decimal') |
| 1685 | @support.cpython_only |
| 1686 | def test_c_classes(self): |
| 1687 | @functools.singledispatch |
| 1688 | def g(obj): |
| 1689 | return "base" |
| 1690 | @g.register(decimal.DecimalException) |
| 1691 | def _(obj): |
| 1692 | return obj.args |
| 1693 | subn = decimal.Subnormal("Exponent < Emin") |
| 1694 | rnd = decimal.Rounded("Number got rounded") |
| 1695 | self.assertEqual(g(subn), ("Exponent < Emin",)) |
| 1696 | self.assertEqual(g(rnd), ("Number got rounded",)) |
| 1697 | @g.register(decimal.Subnormal) |
| 1698 | def _(obj): |
| 1699 | return "Too small to care." |
| 1700 | self.assertEqual(g(subn), "Too small to care.") |
| 1701 | self.assertEqual(g(rnd), ("Number got rounded",)) |
| 1702 | |
| 1703 | def test_compose_mro(self): |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1704 | # None of the examples in this test depend on haystack ordering. |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1705 | c = collections.abc |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1706 | mro = functools._compose_mro |
| 1707 | bases = [c.Sequence, c.MutableMapping, c.Mapping, c.Set] |
| 1708 | for haystack in permutations(bases): |
| 1709 | m = mro(dict, haystack) |
Guido van Rossum | f066694 | 2016-08-23 10:47:07 -0700 | [diff] [blame] | 1710 | self.assertEqual(m, [dict, c.MutableMapping, c.Mapping, |
| 1711 | c.Collection, c.Sized, c.Iterable, |
| 1712 | c.Container, object]) |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1713 | bases = [c.Container, c.Mapping, c.MutableMapping, collections.OrderedDict] |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1714 | for haystack in permutations(bases): |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1715 | m = mro(collections.ChainMap, haystack) |
| 1716 | self.assertEqual(m, [collections.ChainMap, c.MutableMapping, c.Mapping, |
Guido van Rossum | f066694 | 2016-08-23 10:47:07 -0700 | [diff] [blame] | 1717 | c.Collection, c.Sized, c.Iterable, |
| 1718 | c.Container, object]) |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1719 | |
| 1720 | # If there's a generic function with implementations registered for |
| 1721 | # both Sized and Container, passing a defaultdict to it results in an |
| 1722 | # ambiguous dispatch which will cause a RuntimeError (see |
| 1723 | # test_mro_conflicts). |
| 1724 | bases = [c.Container, c.Sized, str] |
| 1725 | for haystack in permutations(bases): |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1726 | m = mro(collections.defaultdict, [c.Sized, c.Container, str]) |
| 1727 | self.assertEqual(m, [collections.defaultdict, dict, c.Sized, |
| 1728 | c.Container, object]) |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1729 | |
| 1730 | # MutableSequence below is registered directly on D. In other words, it |
Martin Panter | 46f5072 | 2016-05-26 05:35:26 +0000 | [diff] [blame] | 1731 | # precedes MutableMapping which means single dispatch will always |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1732 | # choose MutableSequence here. |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1733 | class D(collections.defaultdict): |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1734 | pass |
| 1735 | c.MutableSequence.register(D) |
| 1736 | bases = [c.MutableSequence, c.MutableMapping] |
| 1737 | for haystack in permutations(bases): |
| 1738 | m = mro(D, bases) |
Guido van Rossum | f066694 | 2016-08-23 10:47:07 -0700 | [diff] [blame] | 1739 | self.assertEqual(m, [D, c.MutableSequence, c.Sequence, c.Reversible, |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1740 | collections.defaultdict, dict, c.MutableMapping, c.Mapping, |
Guido van Rossum | f066694 | 2016-08-23 10:47:07 -0700 | [diff] [blame] | 1741 | c.Collection, c.Sized, c.Iterable, c.Container, |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1742 | object]) |
| 1743 | |
| 1744 | # Container and Callable are registered on different base classes and |
| 1745 | # a generic function supporting both should always pick the Callable |
| 1746 | # implementation if a C instance is passed. |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1747 | class C(collections.defaultdict): |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1748 | def __call__(self): |
| 1749 | pass |
| 1750 | bases = [c.Sized, c.Callable, c.Container, c.Mapping] |
| 1751 | for haystack in permutations(bases): |
| 1752 | m = mro(C, haystack) |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1753 | self.assertEqual(m, [C, c.Callable, collections.defaultdict, dict, c.Mapping, |
Guido van Rossum | f066694 | 2016-08-23 10:47:07 -0700 | [diff] [blame] | 1754 | c.Collection, c.Sized, c.Iterable, |
| 1755 | c.Container, object]) |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1756 | |
| 1757 | def test_register_abc(self): |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1758 | c = collections.abc |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1759 | d = {"a": "b"} |
| 1760 | l = [1, 2, 3] |
| 1761 | s = {object(), None} |
| 1762 | f = frozenset(s) |
| 1763 | t = (1, 2, 3) |
| 1764 | @functools.singledispatch |
| 1765 | def g(obj): |
| 1766 | return "base" |
| 1767 | self.assertEqual(g(d), "base") |
| 1768 | self.assertEqual(g(l), "base") |
| 1769 | self.assertEqual(g(s), "base") |
| 1770 | self.assertEqual(g(f), "base") |
| 1771 | self.assertEqual(g(t), "base") |
| 1772 | g.register(c.Sized, lambda obj: "sized") |
| 1773 | self.assertEqual(g(d), "sized") |
| 1774 | self.assertEqual(g(l), "sized") |
| 1775 | self.assertEqual(g(s), "sized") |
| 1776 | self.assertEqual(g(f), "sized") |
| 1777 | self.assertEqual(g(t), "sized") |
| 1778 | g.register(c.MutableMapping, lambda obj: "mutablemapping") |
| 1779 | self.assertEqual(g(d), "mutablemapping") |
| 1780 | self.assertEqual(g(l), "sized") |
| 1781 | self.assertEqual(g(s), "sized") |
| 1782 | self.assertEqual(g(f), "sized") |
| 1783 | self.assertEqual(g(t), "sized") |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1784 | g.register(collections.ChainMap, lambda obj: "chainmap") |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1785 | self.assertEqual(g(d), "mutablemapping") # irrelevant ABCs registered |
| 1786 | self.assertEqual(g(l), "sized") |
| 1787 | self.assertEqual(g(s), "sized") |
| 1788 | self.assertEqual(g(f), "sized") |
| 1789 | self.assertEqual(g(t), "sized") |
| 1790 | g.register(c.MutableSequence, lambda obj: "mutablesequence") |
| 1791 | self.assertEqual(g(d), "mutablemapping") |
| 1792 | self.assertEqual(g(l), "mutablesequence") |
| 1793 | self.assertEqual(g(s), "sized") |
| 1794 | self.assertEqual(g(f), "sized") |
| 1795 | self.assertEqual(g(t), "sized") |
| 1796 | g.register(c.MutableSet, lambda obj: "mutableset") |
| 1797 | self.assertEqual(g(d), "mutablemapping") |
| 1798 | self.assertEqual(g(l), "mutablesequence") |
| 1799 | self.assertEqual(g(s), "mutableset") |
| 1800 | self.assertEqual(g(f), "sized") |
| 1801 | self.assertEqual(g(t), "sized") |
| 1802 | g.register(c.Mapping, lambda obj: "mapping") |
| 1803 | self.assertEqual(g(d), "mutablemapping") # not specific enough |
| 1804 | self.assertEqual(g(l), "mutablesequence") |
| 1805 | self.assertEqual(g(s), "mutableset") |
| 1806 | self.assertEqual(g(f), "sized") |
| 1807 | self.assertEqual(g(t), "sized") |
| 1808 | g.register(c.Sequence, lambda obj: "sequence") |
| 1809 | self.assertEqual(g(d), "mutablemapping") |
| 1810 | self.assertEqual(g(l), "mutablesequence") |
| 1811 | self.assertEqual(g(s), "mutableset") |
| 1812 | self.assertEqual(g(f), "sized") |
| 1813 | self.assertEqual(g(t), "sequence") |
| 1814 | g.register(c.Set, lambda obj: "set") |
| 1815 | self.assertEqual(g(d), "mutablemapping") |
| 1816 | self.assertEqual(g(l), "mutablesequence") |
| 1817 | self.assertEqual(g(s), "mutableset") |
| 1818 | self.assertEqual(g(f), "set") |
| 1819 | self.assertEqual(g(t), "sequence") |
| 1820 | g.register(dict, lambda obj: "dict") |
| 1821 | self.assertEqual(g(d), "dict") |
| 1822 | self.assertEqual(g(l), "mutablesequence") |
| 1823 | self.assertEqual(g(s), "mutableset") |
| 1824 | self.assertEqual(g(f), "set") |
| 1825 | self.assertEqual(g(t), "sequence") |
| 1826 | g.register(list, lambda obj: "list") |
| 1827 | self.assertEqual(g(d), "dict") |
| 1828 | self.assertEqual(g(l), "list") |
| 1829 | self.assertEqual(g(s), "mutableset") |
| 1830 | self.assertEqual(g(f), "set") |
| 1831 | self.assertEqual(g(t), "sequence") |
| 1832 | g.register(set, lambda obj: "concrete-set") |
| 1833 | self.assertEqual(g(d), "dict") |
| 1834 | self.assertEqual(g(l), "list") |
| 1835 | self.assertEqual(g(s), "concrete-set") |
| 1836 | self.assertEqual(g(f), "set") |
| 1837 | self.assertEqual(g(t), "sequence") |
| 1838 | g.register(frozenset, lambda obj: "frozen-set") |
| 1839 | self.assertEqual(g(d), "dict") |
| 1840 | self.assertEqual(g(l), "list") |
| 1841 | self.assertEqual(g(s), "concrete-set") |
| 1842 | self.assertEqual(g(f), "frozen-set") |
| 1843 | self.assertEqual(g(t), "sequence") |
| 1844 | g.register(tuple, lambda obj: "tuple") |
| 1845 | self.assertEqual(g(d), "dict") |
| 1846 | self.assertEqual(g(l), "list") |
| 1847 | self.assertEqual(g(s), "concrete-set") |
| 1848 | self.assertEqual(g(f), "frozen-set") |
| 1849 | self.assertEqual(g(t), "tuple") |
| 1850 | |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1851 | def test_c3_abc(self): |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1852 | c = collections.abc |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1853 | mro = functools._c3_mro |
| 1854 | class A(object): |
| 1855 | pass |
| 1856 | class B(A): |
| 1857 | def __len__(self): |
| 1858 | return 0 # implies Sized |
| 1859 | @c.Container.register |
| 1860 | class C(object): |
| 1861 | pass |
| 1862 | class D(object): |
| 1863 | pass # unrelated |
| 1864 | class X(D, C, B): |
| 1865 | def __call__(self): |
| 1866 | pass # implies Callable |
| 1867 | expected = [X, c.Callable, D, C, c.Container, B, c.Sized, A, object] |
| 1868 | for abcs in permutations([c.Sized, c.Callable, c.Container]): |
| 1869 | self.assertEqual(mro(X, abcs=abcs), expected) |
| 1870 | # unrelated ABCs don't appear in the resulting MRO |
| 1871 | many_abcs = [c.Mapping, c.Sized, c.Callable, c.Container, c.Iterable] |
| 1872 | self.assertEqual(mro(X, abcs=many_abcs), expected) |
| 1873 | |
Yury Selivanov | 77a8cd6 | 2015-08-18 14:20:00 -0400 | [diff] [blame] | 1874 | def test_false_meta(self): |
| 1875 | # see issue23572 |
| 1876 | class MetaA(type): |
| 1877 | def __len__(self): |
| 1878 | return 0 |
| 1879 | class A(metaclass=MetaA): |
| 1880 | pass |
| 1881 | class AA(A): |
| 1882 | pass |
| 1883 | @functools.singledispatch |
| 1884 | def fun(a): |
| 1885 | return 'base A' |
| 1886 | @fun.register(A) |
| 1887 | def _(a): |
| 1888 | return 'fun A' |
| 1889 | aa = AA() |
| 1890 | self.assertEqual(fun(aa), 'fun A') |
| 1891 | |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1892 | def test_mro_conflicts(self): |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1893 | c = collections.abc |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1894 | @functools.singledispatch |
| 1895 | def g(arg): |
| 1896 | return "base" |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1897 | class O(c.Sized): |
| 1898 | def __len__(self): |
| 1899 | return 0 |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1900 | o = O() |
| 1901 | self.assertEqual(g(o), "base") |
| 1902 | g.register(c.Iterable, lambda arg: "iterable") |
| 1903 | g.register(c.Container, lambda arg: "container") |
| 1904 | g.register(c.Sized, lambda arg: "sized") |
| 1905 | g.register(c.Set, lambda arg: "set") |
| 1906 | self.assertEqual(g(o), "sized") |
| 1907 | c.Iterable.register(O) |
| 1908 | self.assertEqual(g(o), "sized") # because it's explicitly in __mro__ |
| 1909 | c.Container.register(O) |
| 1910 | self.assertEqual(g(o), "sized") # see above: Sized is in __mro__ |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1911 | c.Set.register(O) |
| 1912 | self.assertEqual(g(o), "set") # because c.Set is a subclass of |
| 1913 | # c.Sized and c.Container |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1914 | class P: |
| 1915 | pass |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1916 | p = P() |
| 1917 | self.assertEqual(g(p), "base") |
| 1918 | c.Iterable.register(P) |
| 1919 | self.assertEqual(g(p), "iterable") |
| 1920 | c.Container.register(P) |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1921 | with self.assertRaises(RuntimeError) as re_one: |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1922 | g(p) |
Benjamin Peterson | ab078e9 | 2016-07-13 21:13:29 -0700 | [diff] [blame] | 1923 | self.assertIn( |
| 1924 | str(re_one.exception), |
| 1925 | (("Ambiguous dispatch: <class 'collections.abc.Container'> " |
| 1926 | "or <class 'collections.abc.Iterable'>"), |
| 1927 | ("Ambiguous dispatch: <class 'collections.abc.Iterable'> " |
| 1928 | "or <class 'collections.abc.Container'>")), |
| 1929 | ) |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1930 | class Q(c.Sized): |
| 1931 | def __len__(self): |
| 1932 | return 0 |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 1933 | q = Q() |
| 1934 | self.assertEqual(g(q), "sized") |
| 1935 | c.Iterable.register(Q) |
| 1936 | self.assertEqual(g(q), "sized") # because it's explicitly in __mro__ |
| 1937 | c.Set.register(Q) |
| 1938 | self.assertEqual(g(q), "set") # because c.Set is a subclass of |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1939 | # c.Sized and c.Iterable |
| 1940 | @functools.singledispatch |
| 1941 | def h(arg): |
| 1942 | return "base" |
| 1943 | @h.register(c.Sized) |
| 1944 | def _(arg): |
| 1945 | return "sized" |
| 1946 | @h.register(c.Container) |
| 1947 | def _(arg): |
| 1948 | return "container" |
| 1949 | # Even though Sized and Container are explicit bases of MutableMapping, |
| 1950 | # this ABC is implicitly registered on defaultdict which makes all of |
| 1951 | # MutableMapping's bases implicit as well from defaultdict's |
| 1952 | # perspective. |
| 1953 | with self.assertRaises(RuntimeError) as re_two: |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1954 | h(collections.defaultdict(lambda: 0)) |
Benjamin Peterson | ab078e9 | 2016-07-13 21:13:29 -0700 | [diff] [blame] | 1955 | self.assertIn( |
| 1956 | str(re_two.exception), |
| 1957 | (("Ambiguous dispatch: <class 'collections.abc.Container'> " |
| 1958 | "or <class 'collections.abc.Sized'>"), |
| 1959 | ("Ambiguous dispatch: <class 'collections.abc.Sized'> " |
| 1960 | "or <class 'collections.abc.Container'>")), |
| 1961 | ) |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 1962 | class R(collections.defaultdict): |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 1963 | pass |
| 1964 | c.MutableSequence.register(R) |
| 1965 | @functools.singledispatch |
| 1966 | def i(arg): |
| 1967 | return "base" |
| 1968 | @i.register(c.MutableMapping) |
| 1969 | def _(arg): |
| 1970 | return "mapping" |
| 1971 | @i.register(c.MutableSequence) |
| 1972 | def _(arg): |
| 1973 | return "sequence" |
| 1974 | r = R() |
| 1975 | self.assertEqual(i(r), "sequence") |
| 1976 | class S: |
| 1977 | pass |
| 1978 | class T(S, c.Sized): |
| 1979 | def __len__(self): |
| 1980 | return 0 |
| 1981 | t = T() |
| 1982 | self.assertEqual(h(t), "sized") |
| 1983 | c.Container.register(T) |
| 1984 | self.assertEqual(h(t), "sized") # because it's explicitly in the MRO |
| 1985 | class U: |
| 1986 | def __len__(self): |
| 1987 | return 0 |
| 1988 | u = U() |
| 1989 | self.assertEqual(h(u), "sized") # implicit Sized subclass inferred |
| 1990 | # from the existence of __len__() |
| 1991 | c.Container.register(U) |
| 1992 | # There is no preference for registered versus inferred ABCs. |
| 1993 | with self.assertRaises(RuntimeError) as re_three: |
| 1994 | h(u) |
Benjamin Peterson | ab078e9 | 2016-07-13 21:13:29 -0700 | [diff] [blame] | 1995 | self.assertIn( |
| 1996 | str(re_three.exception), |
| 1997 | (("Ambiguous dispatch: <class 'collections.abc.Container'> " |
| 1998 | "or <class 'collections.abc.Sized'>"), |
| 1999 | ("Ambiguous dispatch: <class 'collections.abc.Sized'> " |
| 2000 | "or <class 'collections.abc.Container'>")), |
| 2001 | ) |
Łukasz Langa | 3720c77 | 2013-07-01 16:00:38 +0200 | [diff] [blame] | 2002 | class V(c.Sized, S): |
| 2003 | def __len__(self): |
| 2004 | return 0 |
| 2005 | @functools.singledispatch |
| 2006 | def j(arg): |
| 2007 | return "base" |
| 2008 | @j.register(S) |
| 2009 | def _(arg): |
| 2010 | return "s" |
| 2011 | @j.register(c.Container) |
| 2012 | def _(arg): |
| 2013 | return "container" |
| 2014 | v = V() |
| 2015 | self.assertEqual(j(v), "s") |
| 2016 | c.Container.register(V) |
| 2017 | self.assertEqual(j(v), "container") # because it ends up right after |
| 2018 | # Sized in the MRO |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 2019 | |
| 2020 | def test_cache_invalidation(self): |
| 2021 | from collections import UserDict |
| 2022 | class TracingDict(UserDict): |
| 2023 | def __init__(self, *args, **kwargs): |
| 2024 | super(TracingDict, self).__init__(*args, **kwargs) |
| 2025 | self.set_ops = [] |
| 2026 | self.get_ops = [] |
| 2027 | def __getitem__(self, key): |
| 2028 | result = self.data[key] |
| 2029 | self.get_ops.append(key) |
| 2030 | return result |
| 2031 | def __setitem__(self, key, value): |
| 2032 | self.set_ops.append(key) |
| 2033 | self.data[key] = value |
| 2034 | def clear(self): |
| 2035 | self.data.clear() |
| 2036 | _orig_wkd = functools.WeakKeyDictionary |
| 2037 | td = TracingDict() |
| 2038 | functools.WeakKeyDictionary = lambda: td |
Serhiy Storchaka | 2e576f5 | 2017-04-24 09:05:00 +0300 | [diff] [blame] | 2039 | c = collections.abc |
Łukasz Langa | 6f69251 | 2013-06-05 12:20:24 +0200 | [diff] [blame] | 2040 | @functools.singledispatch |
| 2041 | def g(arg): |
| 2042 | return "base" |
| 2043 | d = {} |
| 2044 | l = [] |
| 2045 | self.assertEqual(len(td), 0) |
| 2046 | self.assertEqual(g(d), "base") |
| 2047 | self.assertEqual(len(td), 1) |
| 2048 | self.assertEqual(td.get_ops, []) |
| 2049 | self.assertEqual(td.set_ops, [dict]) |
| 2050 | self.assertEqual(td.data[dict], g.registry[object]) |
| 2051 | self.assertEqual(g(l), "base") |
| 2052 | self.assertEqual(len(td), 2) |
| 2053 | self.assertEqual(td.get_ops, []) |
| 2054 | self.assertEqual(td.set_ops, [dict, list]) |
| 2055 | self.assertEqual(td.data[dict], g.registry[object]) |
| 2056 | self.assertEqual(td.data[list], g.registry[object]) |
| 2057 | self.assertEqual(td.data[dict], td.data[list]) |
| 2058 | self.assertEqual(g(l), "base") |
| 2059 | self.assertEqual(g(d), "base") |
| 2060 | self.assertEqual(td.get_ops, [list, dict]) |
| 2061 | self.assertEqual(td.set_ops, [dict, list]) |
| 2062 | g.register(list, lambda arg: "list") |
| 2063 | self.assertEqual(td.get_ops, [list, dict]) |
| 2064 | self.assertEqual(len(td), 0) |
| 2065 | self.assertEqual(g(d), "base") |
| 2066 | self.assertEqual(len(td), 1) |
| 2067 | self.assertEqual(td.get_ops, [list, dict]) |
| 2068 | self.assertEqual(td.set_ops, [dict, list, dict]) |
| 2069 | self.assertEqual(td.data[dict], |
| 2070 | functools._find_impl(dict, g.registry)) |
| 2071 | self.assertEqual(g(l), "list") |
| 2072 | self.assertEqual(len(td), 2) |
| 2073 | self.assertEqual(td.get_ops, [list, dict]) |
| 2074 | self.assertEqual(td.set_ops, [dict, list, dict, list]) |
| 2075 | self.assertEqual(td.data[list], |
| 2076 | functools._find_impl(list, g.registry)) |
| 2077 | class X: |
| 2078 | pass |
| 2079 | c.MutableMapping.register(X) # Will not invalidate the cache, |
| 2080 | # not using ABCs yet. |
| 2081 | self.assertEqual(g(d), "base") |
| 2082 | self.assertEqual(g(l), "list") |
| 2083 | self.assertEqual(td.get_ops, [list, dict, dict, list]) |
| 2084 | self.assertEqual(td.set_ops, [dict, list, dict, list]) |
| 2085 | g.register(c.Sized, lambda arg: "sized") |
| 2086 | self.assertEqual(len(td), 0) |
| 2087 | self.assertEqual(g(d), "sized") |
| 2088 | self.assertEqual(len(td), 1) |
| 2089 | self.assertEqual(td.get_ops, [list, dict, dict, list]) |
| 2090 | self.assertEqual(td.set_ops, [dict, list, dict, list, dict]) |
| 2091 | self.assertEqual(g(l), "list") |
| 2092 | self.assertEqual(len(td), 2) |
| 2093 | self.assertEqual(td.get_ops, [list, dict, dict, list]) |
| 2094 | self.assertEqual(td.set_ops, [dict, list, dict, list, dict, list]) |
| 2095 | self.assertEqual(g(l), "list") |
| 2096 | self.assertEqual(g(d), "sized") |
| 2097 | self.assertEqual(td.get_ops, [list, dict, dict, list, list, dict]) |
| 2098 | self.assertEqual(td.set_ops, [dict, list, dict, list, dict, list]) |
| 2099 | g.dispatch(list) |
| 2100 | g.dispatch(dict) |
| 2101 | self.assertEqual(td.get_ops, [list, dict, dict, list, list, dict, |
| 2102 | list, dict]) |
| 2103 | self.assertEqual(td.set_ops, [dict, list, dict, list, dict, list]) |
| 2104 | c.MutableSet.register(X) # Will invalidate the cache. |
| 2105 | self.assertEqual(len(td), 2) # Stale cache. |
| 2106 | self.assertEqual(g(l), "list") |
| 2107 | self.assertEqual(len(td), 1) |
| 2108 | g.register(c.MutableMapping, lambda arg: "mutablemapping") |
| 2109 | self.assertEqual(len(td), 0) |
| 2110 | self.assertEqual(g(d), "mutablemapping") |
| 2111 | self.assertEqual(len(td), 1) |
| 2112 | self.assertEqual(g(l), "list") |
| 2113 | self.assertEqual(len(td), 2) |
| 2114 | g.register(dict, lambda arg: "dict") |
| 2115 | self.assertEqual(g(d), "dict") |
| 2116 | self.assertEqual(g(l), "list") |
| 2117 | g._clear_cache() |
| 2118 | self.assertEqual(len(td), 0) |
| 2119 | functools.WeakKeyDictionary = _orig_wkd |
| 2120 | |
| 2121 | |
Raymond Hettinger | 9c323f8 | 2005-02-28 19:39:44 +0000 | [diff] [blame] | 2122 | if __name__ == '__main__': |
Zachary Ware | 38c707e | 2015-04-13 15:00:43 -0500 | [diff] [blame] | 2123 | unittest.main() |