Pytest 简明教程

Pytest - Parameterizing Tests

测试参数化用于针对多组输入运行测试。我们可以使用以下标记来执行此操作 -

@pytest.mark.parametrize

将以下代码复制到名为 test_multiplication.py 的文件中 -

import pytest

@pytest.mark.parametrize("num, output",[(1,11),(2,22),(3,35),(4,44)])
def test_multiplication_11(num, output):
   assert 11*num == output

此处，测试将输入乘以 11，并将结果与预期输出进行比较。测试有 4 组输入，每组有 2 个值 - 一个是与 11 相乘的数字，另一个是预期结果。

通过运行以下命令执行测试 -

Pytest -k multiplication -v

上述命令将生成以下输出 −

test_multiplication.py::test_multiplication_11[1-11] PASSED
test_multiplication.py::test_multiplication_11[2-22] PASSED
test_multiplication.py::test_multiplication_11[3-35] FAILED
test_multiplication.py::test_multiplication_11[4-44] PASSED
============================================== FAILURES
==============================================
_________________ test_multiplication_11[3-35] __________________
num = 3, output = 35
   @pytest.mark.parametrize("num, output",[(1,11),(2,22),(3,35),(4,44)])
   def test_multiplication_11(num, output):
>  assert 11*num == output
E  assert (11 * 3) == 35
test_multiplication.py:5: AssertionError
============================== 1 failed, 3 passed, 8 deselected in 0.08 seconds
==============================