Test fixture分三类

• setUp/tearDown
• setUpClass/tearDownClass
• setUpModule/tearDownModule

  setUp/tearDown

  函数级，分别在函数的开始和结束进行。

  单个测试用例

  ```python

  用例级别(函数)的测试案例

  import unittest

class MyClass(unittest.TestCase):

def setUp(self):
    print("====> start class")
def tearDown(self):
    print("===> end class")
def test_case(self):
    print("---->test case")

if name == ‘main‘: unittest.main()

![image.png](https://cdn.nlark.com/yuque/0/2021/png/12405790/1630598507372-fab67452-c5a5-44e8-970d-6ef042bf2dab.png#clientId=u0d00ed0a-b184-4&from=paste&height=223&id=ua3fe66ea&margin=%5Bobject%20Object%5D&name=image.png&originHeight=446&originWidth=1285&originalType=binary&ratio=1&size=42338&status=done&style=none&taskId=u754a049f-c9b2-4b5a-a2f4-e72d80c1be7&width=642.5)<br />可以看到各个函数执行的先后顺序。
- [x] setUp
- [x] test_ 
- [x] tearDown
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## 多个测试用例1
```python
# 全正确的用例
import unittest
class MyClass(unittest.TestCase):
    def setUp(self):
        print("====> start class")
    def tearDown(self):
        print("===> end class")
    def test_case2(self):
        print("---->test case2")
        self.assertEqual(4, 4)
    def test_case(self):
        print("---->test case")
if __name__ == '__main__':
    unittest.main()

多个测试用例2

# 有错误的用例
import unittest
class MyClass(unittest.TestCase):
    def setUp(self):
        print("====> start class")
    def tearDown(self):
        print("===> end class")
    def test_case2(self):
        print("---->test case2")
        self.assertEqual(3, 4)
    def test_case(self):
        print("---->test case")
if __name__ == '__main__':
    unittest.main()

setUpClass/tearDownClass

类级别，分别在类的开始和结束执行。

import unittest
class MyClass(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        print("====> start class")
    @classmethod
    def tearDownClass(cls):
        print("===> end class")
    def setUp(self):
        print("start test")
    def tearDown(self):
        print("end test")
    def test_case(self):
        print("---->test case")
        self.assertEqual(2 + 2, 4)
    def test_case2(self):
        print("---->test case2")
        self.assertEqual(4, 4)
if __name__ == '__main__':
    unittest.main()

setUpModule/tearDownModule

文件级别，分别在文件的开始和结束执行。

import unittest
def setUpModule():
    print(">>>>>>>>>>>>>> start module")
def tearDownModule():
    print(">>>>>>>>>>>>>> start module")
class MyClass(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        print("====> start class")
    @classmethod
    def tearDownClass(cls):
        print("===> end class")
    def setUp(self):
        print("start test")
    def tearDown(self):
        print("end test")
    def test_case(self):
        print("---->test case")
        self.assertEqual(2 + 2, 4)
    def test_case2(self):
        print("---->test case2")
        self.assertEqual(4, 4)
if __name__ == '__main__':
    unittest.main()