• pytest_参数化parametrize


    前言

    pytest.mark.parametrize装饰器可以实现测试用例参数化。

    parametrizing

    1.这里是一个实现检查一定的输入和期望输出测试功能的典型例子

    import pytest
    
    @pytest.mark.parametrize(
        "test_input, expected",
        [
            ("3+5", 8),
            ("5+7", 12),
            ("9/3", 3),
            ("6*9", 42)
        ]
    )
    def test_eval(test_input, expected):
        print("______测试用例_______")
        assert eval(test_input) == expected
    
    if __name__ == '__main__':
        pytest.main(["-s", "Parametrize_01.py"])

    运行结果

    ============================= test session starts =============================
    platform win32 -- Python 3.6.2, pytest-3.7.4, py-1.6.0, pluggy-0.7.1
    rootdir: D:python_autos14pytest_learn, inifile:
    collected 4 items
    
    Parametrize_01.py ______测试用例_______
    .______测试用例_______
    .______测试用例_______
    .______测试用例_______
    F
    
    ================================== FAILURES ===================================
    ______________________________ test_eval[6*9-42] ______________________________
    
    test_input = '6*9', expected = 42
    
        @pytest.mark.parametrize(
            "test_input, expected",
            [
                ("3+5", 8),
                ("5+7", 12),
                ("9/3", 3),
                ("6*9", 42)
            ]
        )
        def test_eval(test_input, expected):
            print("______测试用例_______")
    >       assert eval(test_input) == expected
    E       AssertionError: assert 54 == 42
    E        +  where 54 = eval('6*9')
    
    Parametrize_01.py:18: AssertionError
    ===================== 1 failed, 3 passed in 0.07 seconds ======================

    在这个例子中设计的,只有一条输入/输出值的简单测试功能。和往常一样

    函数的参数,你可以在运行结果看到在输入和输出值

    2.它也可以标记单个测试实例在参数化,例如使用内置的mark.xfail

    import pytest
    
    @pytest.mark.parametrize(
        "test_input, expected",
        [
            ("3+5", 8),
            ("5+7", 12),
            ("9/3", 3),
            pytest.param("6*9", 42,
            marks=pytest.mark.xfail),
        ]
    )
    def test_eval(test_input, expected):
        print("______测试用例_______")
        assert eval(test_input) == expected
    
    if __name__ == '__main__':
        pytest.main(["-s", "Parametrize_02.py"])

    运行结果:

    ============================= test session starts =============================
    platform win32 -- Python 3.6.2, pytest-3.7.4, py-1.6.0, pluggy-0.7.1
    rootdir: D:python_autos14pytest_learn, inifile:
    collected 4 items
    
    Parametrize_02.py ______测试用例_______
    .______测试用例_______
    .______测试用例_______
    .______测试用例_______
    x
    
    ===================== 3 passed, 1 xfailed in 0.10 seconds =====================

    标记为失败的用例就不运行了,直接跳过显示xfailed

    参数组合

    1.若要获得多个参数化参数的所有组合,可以堆叠参数化装饰器

    import pytest
    
    @pytest.mark.parametrize("x", [0,1])
    @pytest.mark.parametrize("y", [2,3])
    def test_eval(x, y):
        print("______测试用例_______")
        print("测试数据组合: x -> %s, y -> %s"% (x, y))
    
    if __name__ == '__main__':
        pytest.main(["-s", "Parametrize_03.py"])

    运行结果

    ============================= test session starts =============================
    platform win32 -- Python 3.6.2, pytest-3.7.4, py-1.6.0, pluggy-0.7.1
    rootdir: D:python_autos14pytest_learn, inifile:
    collected 4 items
    
    Parametrize_03.py ______测试用例_______
    测试数据组合: x -> 0, y -> 2
    .______测试用例_______
    测试数据组合: x -> 1, y -> 2
    .______测试用例_______
    测试数据组合: x -> 0, y -> 3
    .______测试用例_______
    测试数据组合: x -> 1, y -> 3
    .
    
    ========================== 4 passed in 0.05 seconds ===========================

    这将运行测试,参数设置为x=0/y=2,x=1/y=2,x=0/y=3,x=1/y=3组合参数。

    作者:含笑半步颠√

    博客链接:https://www.cnblogs.com/lixy-88428977

    声明:本文为博主学习感悟总结,水平有限,如果不当,欢迎指正。如果您认为还不错,欢迎转载。转载与引用请注明作者及出处。

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  • 原文地址:https://www.cnblogs.com/lixy-88428977/p/9672579.html
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