关于单元测试：python多重继承单元测试

Python multiple inheritance unittest -

我试图理解使用unittest.TestCase类进行多重继承时会发生什么。

MyTest_DoesWork输出我所期望的，这是setUp()和tearDown()都被触发。这不是发生在MyTest_DoesNotWork上。为什么会这样？有什么线索吗？

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

import unittest

class MyClassTest1(object):
def setUp(self):
print 'Setting up', self.__class__
def test_a1(self):
print"Running test_a1 for class", self.__class__
def test_a2(self):
print"Running test_a2 for class", self.__class__
def tearDown(self):
print 'Tearing down', self.__class__

class MyClassTest2(object):
def setUp(self):
print 'Setting up', self.__class__
def test_b1(self):
print"Running test_b1 for class", self.__class__
def test_b2(self):
print"Running test_b2 for class", self.__class__
def tearDown(self):
print 'Tearing down', self.__class__

class MyTest_DoesNotWork(unittest.TestCase, MyClassTest1, MyClassTest2):
"""
Output:
Running test_a1 for class <class '__main__.MyTest_DoesNotWork'>
.Running test_a2 for class <class '__main__.MyTest_DoesNotWork'>
.Running test_b1 for class <class '__main__.MyTest_DoesNotWork'>
.Running test_b2 for class <class '__main__.MyTest_DoesNotWork'>
"""
pass

class MyTest_DoesWork(MyClassTest1, MyClassTest2, unittest.TestCase):
"""
Output:
Setting up <class '__main__.MyTest_DoesWork'>
Running test_a1 for class <class '__main__.MyTest_DoesWork'>
Tearing down <class '__main__.MyTest_DoesWork'>
.Setting up <class '__main__.MyTest_DoesWork'>
Running test_a2 for class <class '__main__.MyTest_DoesWork'>
Tearing down <class '__main__.MyTest_DoesWork'>
.Setting up <class '__main__.MyTest_DoesWork'>
Running test_b1 for class <class '__main__.MyTest_DoesWork'>
Tearing down <class '__main__.MyTest_DoesWork'>
.Setting up <class '__main__.MyTest_DoesWork'>
Running test_b2 for class <class '__main__.MyTest_DoesWork'>
Tearing down <class '__main__.MyTest_DoesWork'>
"""
pass

if __name__ =="__main__":
unittest.main()