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 ===============================