1、pytest中的前置处理和后置处理

• 模块级别
  • setup_module 整个.py模块开始执行前，执行一次（全程只一次）
  • teardown_module 整个.py模块结束后，执行一次（全程只一次）
• 函数级别
  • setup_function 每次函数级别的用例执行前，执行一次（可能多次）
  • teardown_function 每次函数级别的用例执行后，执行一次（可能多次）
• 类级别
  • setup_class 整个测试类开始前，执行一次（全程只一次）
  • teardown_function 整个测试类结束后，执行一次（全程只一次）
• 类中方法级别
  • setup_method 类中的每个用例执行前，都会执行一次（可能多次）
  • teardown_function 类中的每个用例执行后，都会执行一次（可能多次）

2、详见以下代码及执行结果

• 代码

  #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  # @Time    : 2022/3/31 3:40 下午
  # @Author  : chenbh
  # @File    : test_demo.py
  
  
  def setup_module():
      print(f"=========this is setup_module")
  
  
  def teardown_module():
      print(f"=========this is teardown_module")
  
  
  def setup_function():
      print("=========this is setup_function")
  
  
  def teardown_function():
      print("=========this is teardown_function")
  
  
  def test_one():
      print("=========this is test_one")
  
  
  def test_tow():
      print("=========this is test_two")
  
  
  class TestCase():
      def setup_class(self):
          print("=========this is setup_class")
  
      def teardown_class(self):
          print("=========this is teardown_class")
  
      def setup_method(self):
          print("=========this is setup_method")
  
      def teardown_method(self):
          print("=========this is teardown_method")
  
      def setup(self):
          print("=========this is setup")
  
      def teardown(self):
          print("=========this is teardown")
  
      def test_three(self):
          print("=========this is test_three")
         
      def test_four(self):
          print("=========this is test_four")
  

• 结果

  ============================= test session starts ==============================
  platform darwin -- Python 3.9.2, pytest-7.1.1, pluggy-1.0.0 -- /Users/chenbinhao/Desktop/Sunnada-work/learnPytest/venv/bin/python
  cachedir: .pytest_cache
  rootdir: /Users/chenbinhao/Desktop/Sunnada-work/learnPytest/demo
  collecting ... collected 4 items
  
  test_demo.py::test_one 
  =========this is setup_module
  =========this is setup_function
  PASSED                                            [ 25%]
  =========this is test_one
  =========this is teardown_function
  
  test_demo.py::test_tow 
  =========this is setup_function
  PASSED                                            [ 50%]
  =========this is test_two
  =========this is teardown_function
  
  test_demo.py::TestCase::test_three 
  =========this is setup_class
  =========this is setup_method
  PASSED                                [ 75%]
  =========this is test_three
  =========this is teardown_method
  
  test_demo.py::TestCase::test_four 
  =========this is setup_method
  PASSED                                 [100%]
  =========this is four
  =========this is teardown_method
  =========this is teardown_class
  =========this is teardown_module
  
  
  ============================== 4 passed in 0.04s ===============================
  
  

参考文章：https://www.cnblogs.com/poloyy/p/12641991.html