1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of logilab-common.
#
# logilab-common is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option) any
# later version.
#
# logilab-common is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with logilab-common. If not, see <http://www.gnu.org/licenses/>.
"""unit tests for the decorators module
"""
import types
from logilab.common.testlib import TestCase, unittest_main
from logilab.common.decorators import (monkeypatch, cached, clear_cache,
copy_cache, cachedproperty)
class DecoratorsTC(TestCase):
def test_monkeypatch_instance_method(self):
class MyClass: pass
@monkeypatch(MyClass)
def meth1(self):
return 12
class XXX(object):
@monkeypatch(MyClass)
def meth2(self):
return 12
self.assertTrue(isinstance(MyClass.meth1, types.MethodType))
self.assertTrue(isinstance(MyClass.meth2, types.MethodType))
def test_monkeypatch_callable_non_callable(self):
tester = self
class MyClass: pass
@monkeypatch(MyClass, methodname='prop1')
@property
def meth1(self):
return 12
class XXX(object):
def __call__(self, other):
tester.assertTrue(isinstance(other, MyClass))
return 12
try:
monkeypatch(MyClass)(XXX())
except AttributeError, err:
self.assertTrue(str(err).endswith('has no __name__ attribute: you should provide an explicit `methodname`'))
monkeypatch(MyClass, 'foo')(XXX())
self.assertTrue(isinstance(MyClass.prop1, property))
self.assertTrue(callable(MyClass.foo))
self.assertEqual(MyClass().prop1, 12)
self.assertEqual(MyClass().foo(), 12)
def test_monkeypatch_with_same_name(self):
class MyClass: pass
@monkeypatch(MyClass)
def meth1(self):
return 12
self.assertEqual([attr for attr in dir(MyClass) if attr[:2] != '__'],
['meth1'])
inst = MyClass()
self.assertEqual(inst.meth1(), 12)
def test_monkeypatch_with_custom_name(self):
class MyClass: pass
@monkeypatch(MyClass, 'foo')
def meth2(self, param):
return param + 12
self.assertEqual([attr for attr in dir(MyClass) if attr[:2] != '__'],
['foo'])
inst = MyClass()
self.assertEqual(inst.foo(4), 16)
def test_cannot_cache_generator(self):
def foo():
yield 42
self.assertRaises(AssertionError, cached, foo)
def test_cached_preserves_docstrings_and_name(self):
class Foo(object):
@cached
def foo(self):
""" what's up doc ? """
def bar(self, zogzog):
""" what's up doc ? """
bar = cached(bar, 1)
@cached
def quux(self, zogzog):
""" what's up doc ? """
self.assertEqual(Foo.foo.__doc__, """ what's up doc ? """)
self.assertEqual(Foo.foo.__name__, 'foo')
self.assertEqual(Foo.foo.func_name, 'foo')
self.assertEqual(Foo.bar.__doc__, """ what's up doc ? """)
self.assertEqual(Foo.bar.__name__, 'bar')
self.assertEqual(Foo.bar.func_name, 'bar')
self.assertEqual(Foo.quux.__doc__, """ what's up doc ? """)
self.assertEqual(Foo.quux.__name__, 'quux')
self.assertEqual(Foo.quux.func_name, 'quux')
def test_cached_single_cache(self):
class Foo(object):
@cached(cacheattr=u'_foo')
def foo(self):
""" what's up doc ? """
foo = Foo()
foo.foo()
self.assertTrue(hasattr(foo, '_foo'))
clear_cache(foo, 'foo')
self.assertFalse(hasattr(foo, '_foo'))
def test_cached_multi_cache(self):
class Foo(object):
@cached(cacheattr=u'_foo')
def foo(self, args):
""" what's up doc ? """
foo = Foo()
foo.foo(1)
self.assertEqual(foo._foo, {(1,): None})
clear_cache(foo, 'foo')
self.assertFalse(hasattr(foo, '_foo'))
def test_cached_keyarg_cache(self):
class Foo(object):
@cached(cacheattr=u'_foo', keyarg=1)
def foo(self, other, args):
""" what's up doc ? """
foo = Foo()
foo.foo(2, 1)
self.assertEqual(foo._foo, {2: None})
clear_cache(foo, 'foo')
self.assertFalse(hasattr(foo, '_foo'))
def test_cached_property(self):
class Foo(object):
@property
@cached(cacheattr=u'_foo')
def foo(self):
""" what's up doc ? """
foo = Foo()
foo.foo
self.assertEqual(foo._foo, None)
clear_cache(foo, 'foo')
self.assertFalse(hasattr(foo, '_foo'))
def test_copy_cache(self):
class Foo(object):
@cached(cacheattr=u'_foo')
def foo(self, args):
""" what's up doc ? """
foo = Foo()
foo.foo(1)
self.assertEqual(foo._foo, {(1,): None})
foo2 = Foo()
self.assertFalse(hasattr(foo2, '_foo'))
copy_cache(foo2, 'foo', foo)
self.assertEqual(foo2._foo, {(1,): None})
def test_cachedproperty(self):
class Foo(object):
x = 0
@cachedproperty
def bar(self):
self.__class__.x += 1
return self.__class__.x
@cachedproperty
def quux(self):
""" some prop """
return 42
foo = Foo()
self.assertEqual(Foo.x, 0)
self.failIf('bar' in foo.__dict__)
self.assertEqual(foo.bar, 1)
self.failUnless('bar' in foo.__dict__)
self.assertEqual(foo.bar, 1)
self.assertEqual(foo.quux, 42)
self.assertEqual(Foo.bar.__doc__,
'<wrapped by the cachedproperty decorator>')
self.assertEqual(Foo.quux.__doc__,
'<wrapped by the cachedproperty decorator>\n some prop ')
foo2 = Foo()
self.assertEqual(foo2.bar, 2)
# make sure foo.foo is cached
self.assertEqual(foo.bar, 1)
class Kallable(object):
def __call__(self):
return 42
self.assertRaises(TypeError, cachedproperty, Kallable())
if __name__ == '__main__':
unittest_main()
|
