pytest 参数化 pytest文档9-参数化parametrize

pytest文档9-参数化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

# content of test_expectation.py

# coding:utf-8

import pytest
@pytest.mark.parametrize("test_input,expected",
                         [ ("3+5", 8), ("2+4", 6), ("6 * 9", 42), ]) def test_eval(test_input, expected): assert eval(test_input) == expected if __name__ == "__main__": pytest.main(["-s", "test_canshu1.py"]) 

运行结果


================================== FAILURES ===================================
_____________________________ test_eval[6 * 9-42] _____________________________

test_input = '6 * 9', expected = 42 @pytest.mark.parametrize("test_input,expected", [ ("3+5", 8), ("2+4", 6), ("6 * 9", 42), ]) def test_eval(test_input, expected): > assert eval(test_input) == expected E AssertionError: assert 54 == 42 E + where 54 = eval('6 * 9') test_canshu1.py:11: AssertionError ===================== 1 failed, 2 passed in 1.98 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

# content of test_expectation.py
import pytest
@pytest.mark.parametrize("test_input,expected", [
                        ("3+5", 8), ("2+4", 6), pytest.param("6 * 9", 42, marks=pytest.mark.xfail), ]) def test_eval(test_input, expected): print("-------开始用例------") assert eval(test_input) == expected if __name__ == "__main__": pytest.main(["-s", "test_canshu1.py"])

运行结果:

test_canshu1.py -------开始用例------
.-------开始用例------
.-------开始用例------
x

===================== 2 passed, 1 xfailed in 1.84 seconds =====================

标记为失败的用例,预期结果是失败,实际运行也是失败,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_foo(x, y): print("测试数据组合:x->%s, y->%s" % (x, y)) if __name__ == "__main__": pytest.main(["-s", "test_canshu1.py"])

运行结果


test_canshu1.py 测试数据组合:x->0, y->2
.测试数据组合:x->1, y->2 .测试数据组合:x->0, y->3 .测试数据组合:x->1, y->3 . ========================== 4 passed in 1.75 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。

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

# content of test_expectation.py

# coding:utf-8

import pytest
@pytest.mark.parametrize("test_input,expected",
                         [ ("3+5", 8), ("2+4", 6), ("6 * 9", 42), ]) def test_eval(test_input, expected): assert eval(test_input) == expected if __name__ == "__main__": pytest.main(["-s", "test_canshu1.py"]) 

运行结果


================================== FAILURES ===================================
_____________________________ test_eval[6 * 9-42] _____________________________

test_input = '6 * 9', expected = 42 @pytest.mark.parametrize("test_input,expected", [ ("3+5", 8), ("2+4", 6), ("6 * 9", 42), ]) def test_eval(test_input, expected): > assert eval(test_input) == expected E AssertionError: assert 54 == 42 E + where 54 = eval('6 * 9') test_canshu1.py:11: AssertionError ===================== 1 failed, 2 passed in 1.98 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

# content of test_expectation.py
import pytest
@pytest.mark.parametrize("test_input,expected", [
                        ("3+5", 8), ("2+4", 6), pytest.param("6 * 9", 42, marks=pytest.mark.xfail), ]) def test_eval(test_input, expected): print("-------开始用例------") assert eval(test_input) == expected if __name__ == "__main__": pytest.main(["-s", "test_canshu1.py"])

运行结果:

test_canshu1.py -------开始用例------
.-------开始用例------
.-------开始用例------
x

===================== 2 passed, 1 xfailed in 1.84 seconds =====================

标记为失败的用例,预期结果是失败,实际运行也是失败,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_foo(x, y): print("测试数据组合:x->%s, y->%s" % (x, y)) if __name__ == "__main__": pytest.main(["-s", "test_canshu1.py"])

运行结果


test_canshu1.py 测试数据组合:x->0, y->2
.测试数据组合:x->1, y->2 .测试数据组合:x->0, y->3 .测试数据组合:x->1, y->3 . ========================== 4 passed in 1.75 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。

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转载自www.cnblogs.com/bonelee/p/12110957.html