Pytest (4) - test case execution sequence

Preface

In the last article, we talked about pytest Naming rules of test cases in , So in pytest In what order are the test cases executed in ？

stay unittest In the frame , The default in accordance with the ACSII Load test cases in the order of code and execute , In sequence ：0_9、AZ、a~z, Test directory 、 Test module 、 Test class 、 The test method / Test functions load test cases according to this rule .

and pytest The execution sequence of use cases in is the same as unittest It's different ,pytest There is a default execution order , You can also customize the execution order .

pytest Default execution order

• Test directory 、 Test module , Execute in sort order

  

  The order of execution is as follows ：

  

• Execution sequence under the same test module

  import pytest
  
  class TestOrder:
  
      def test_e(self):
          print("test_e")
  
      def test_4(self):
          print("test_4")
  
  
  def test_b():
      print("test_a")
  
  def test_a():
      print("test_a")
  
  def test_2():
      print("test_2")
  
  def test_1():
      print("test_1")
  
  
  if __name__ == '__main__':
      pytest.main()
  

  The order of execution is as follows ：

  

Custom execution order

pytest The framework supports the execution sequence of custom test cases , Need to install pytest-ordering plug-in unit .

install

pip install pytest-ordering

Use

Need to use @pytest.mark.run(), The code is as follows ：

import pytest

class TestOrder:

    def test_e(self):
        print("test_e")

    def test_4(self):
        print("test_4")


def test_b():
    print("test_a")

@pytest.mark.run(order=2)
def test_a():
    print("test_a")

@pytest.mark.run(order=1)
def test_2():
    print("test_2")

def test_1():
    print("test_1")


if __name__ == '__main__':
    pytest.main()

The order of execution is as follows ：

In the test module , First of all, to be @pytest.mark.run() Marking test methods / Test functions , Then perform other tasks in the default order .

summary

although pytest You can customize the execution order of test cases , But in the process of actual test case design , Use cases should not be executed in sequence , That is, any individual test case is an independent and complete verification of function points , Not dependent on other use cases .