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
|
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Test cases for twisted.hook module.
"""
from twisted.python import hook
from twisted.trial import unittest
class BaseClass:
"""
dummy class to help in testing.
"""
def __init__(self):
"""
dummy initializer
"""
self.calledBasePre = 0
self.calledBasePost = 0
self.calledBase = 0
def func(self, a, b):
"""
dummy method
"""
assert a == 1
assert b == 2
self.calledBase = self.calledBase + 1
class SubClass(BaseClass):
"""
another dummy class
"""
def __init__(self):
"""
another dummy initializer
"""
BaseClass.__init__(self)
self.calledSubPre = 0
self.calledSubPost = 0
self.calledSub = 0
def func(self, a, b):
"""
another dummy function
"""
assert a == 1
assert b == 2
BaseClass.func(self, a, b)
self.calledSub = self.calledSub + 1
_clean_BaseClass = BaseClass.__dict__.copy()
_clean_SubClass = SubClass.__dict__.copy()
def basePre(base, a, b):
"""
a pre-hook for the base class
"""
base.calledBasePre = base.calledBasePre + 1
def basePost(base, a, b):
"""
a post-hook for the base class
"""
base.calledBasePost = base.calledBasePost + 1
def subPre(sub, a, b):
"""
a pre-hook for the subclass
"""
sub.calledSubPre = sub.calledSubPre + 1
def subPost(sub, a, b):
"""
a post-hook for the subclass
"""
sub.calledSubPost = sub.calledSubPost + 1
class HookTestCase(unittest.TestCase):
"""
test case to make sure hooks are called
"""
def setUp(self):
"""Make sure we have clean versions of our classes."""
BaseClass.__dict__.clear()
BaseClass.__dict__.update(_clean_BaseClass)
SubClass.__dict__.clear()
SubClass.__dict__.update(_clean_SubClass)
def testBaseHook(self):
"""make sure that the base class's hook is called reliably
"""
base = BaseClass()
self.assertEqual(base.calledBase, 0)
self.assertEqual(base.calledBasePre, 0)
base.func(1,2)
self.assertEqual(base.calledBase, 1)
self.assertEqual(base.calledBasePre, 0)
hook.addPre(BaseClass, "func", basePre)
base.func(1, b=2)
self.assertEqual(base.calledBase, 2)
self.assertEqual(base.calledBasePre, 1)
hook.addPost(BaseClass, "func", basePost)
base.func(1, b=2)
self.assertEqual(base.calledBasePost, 1)
self.assertEqual(base.calledBase, 3)
self.assertEqual(base.calledBasePre, 2)
hook.removePre(BaseClass, "func", basePre)
hook.removePost(BaseClass, "func", basePost)
base.func(1, b=2)
self.assertEqual(base.calledBasePost, 1)
self.assertEqual(base.calledBase, 4)
self.assertEqual(base.calledBasePre, 2)
def testSubHook(self):
"""test interactions between base-class hooks and subclass hooks
"""
sub = SubClass()
self.assertEqual(sub.calledSub, 0)
self.assertEqual(sub.calledBase, 0)
sub.func(1, b=2)
self.assertEqual(sub.calledSub, 1)
self.assertEqual(sub.calledBase, 1)
hook.addPre(SubClass, 'func', subPre)
self.assertEqual(sub.calledSub, 1)
self.assertEqual(sub.calledBase, 1)
self.assertEqual(sub.calledSubPre, 0)
self.assertEqual(sub.calledBasePre, 0)
sub.func(1, b=2)
self.assertEqual(sub.calledSub, 2)
self.assertEqual(sub.calledBase, 2)
self.assertEqual(sub.calledSubPre, 1)
self.assertEqual(sub.calledBasePre, 0)
# let the pain begin
hook.addPre(BaseClass, 'func', basePre)
BaseClass.func(sub, 1, b=2)
# sub.func(1, b=2)
self.assertEqual(sub.calledBase, 3)
self.assertEqual(sub.calledBasePre, 1, str(sub.calledBasePre))
sub.func(1, b=2)
self.assertEqual(sub.calledBasePre, 2)
self.assertEqual(sub.calledBase, 4)
self.assertEqual(sub.calledSubPre, 2)
self.assertEqual(sub.calledSub, 3)
testCases = [HookTestCase]
|
