Pytest - 参数化测试

• 

  简述

  完成测试的参数化以针对多组输入运行测试。我们可以通过使用以下标记来做到这一点 -

  
  @pytest.mark.parametrize
  

  将以下代码复制到名为test_multiplication.py−

  
  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
  

  这里测试将输入乘以 11，并将结果与​​预期输出进行比较。该测试有 4 组输入，每组有 2 个值——一个是要乘以 11 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
  ==============================