PyTest是基于Python的开源测试框架，语法简单易用，有大量的插件，功能非常多。自动检测测试用例，支持参数化，跳过特定用例，失败重试等功能。
安装 pip install -U pytest # 安装 pytest --version # 查看版本 pytest -h # 查看帮助信息 用例识别pytest识别文件名为test_.py或者_test.py的测试文件
测试文件中可以在Test*类中写测试用例（测试用例以test_*开头，并且测试类不能有__init__方法）
不在Test类中的test_用例也可以被识别到。
识别包含“add”的用例：
pytest -k "add" --collect-only
(base) D:\ProgramWorkspace\TestingDemo>pytest -k "add" --collect-only ============================================== test session starts ============================================== platform win32 -- Python 3.7.6, pytest-5.3.5, py-1.8.1, pluggy-0.13.1 rootdir: D:\ProgramWorkspace\TestingDemo plugins: hypothesis-5.5.4, arraydiff-0.3, astropy-header-0.1.2, doctestplus-0.5.0, openfiles-0.4.0, remotedata-0.3 .2 collected 20 items / 11 deselected / 9 selected <Package D:\ProgramWorkspace\TestingDemo\testing> <Module test_calc.py> <UnitTestCase TestCalc> <TestCaseFunction test_add_1> <TestCaseFunction test_add_2> <Module test_calc2.py> <Class TestCalc> <Function test_add[1-2-3]> <Function test_add[-1--2--3]> <Function test_add[0-1-1]> <Function test_add[0--1--1]> <Function test_add[0.1-0.2-0.3]> <Function test_add[999999-1000000-1999999]> <Function test_add_1>打印文件下所有用例：
pytest --collect-only
(base) D:\ProgramWorkspace\TestingDemo>pytest --collect-only ============================================== test session starts ============================================== platform win32 -- Python 3.7.6, pytest-5.3.5, py-1.8.1, pluggy-0.13.1 rootdir: D:\ProgramWorkspace\TestingDemo plugins: hypothesis-5.5.4, arraydiff-0.3, astropy-header-0.1.2, doctestplus-0.5.0, openfiles-0.4.0, remotedata-0.3 .2 collected 20 items <Module test_pytest.py> <Function test_one> <Function test_two> <Function test_three> <Module test_pytest2.py> <Class Test_Demo> <Function test_one> <Function test_two> <Function test_three> <Package D:\ProgramWorkspace\TestingDemo\testing> <Module test_calc.py> <UnitTestCase TestCalc> <TestCaseFunction test_add_1> <TestCaseFunction test_add_2> <Module test_calc2.py> <Class TestCalc> <Function test_add[1-2-3]> <Function test_add[-1--2--3]> <Function test_add[0-1-1]> <Function test_add[0--1--1]> <Function test_add[0.1-0.2-0.3]> <Function test_add[999999-1000000-1999999]> <Function test_div[1-2-0.5]> <Function test_div[-1--2-0.5]> <Function test_div[0-1-0]> <Function test_div[1-0-0]> <Function test_div[0.1-0.2-0.5]> <Function test_add_1> Pytest执行一个简单的测试用例test_pytest.py：
import pytest def calc(a,b): return a + b class TestDemo(): def test_answer1(self): assert calc(1, 1) == 2 def test_answer2(self): assert calc(2, 1) == 3 @pytest.mark.answer3 def test_answer3(self): assert calc(6, 6) == 12 if __name__=='__main__': pytest.main() 用例执行 # 执行test_pytest.py所有用例（模块） pytest test_pytest.py # 执行test_pytest.py里的TestDemo类 pytest test_pytest.py::TestDemo # 执行test_pytest.py里的TestDemo类的test_answer2方法 pytest test_pytest.py::TestDemo::test_answer2 打印日志信息 # 打印详细运行日志信息 pytest -v test_pytest.py pytest -s test_pytest.py