Grouping Tests Using pytest.mark

In Python, Pytest is a popular testing framework used for writing and running test cases. The pytest.mark decorator allows you to categorize and group tests based on specific markers. This helps in organizing tests efficiently and running selected test groups as needed.

pytest.mark Decorator

The pytest.mark decorator can be used to assign labels (markers) to test functions. This helps in selectively running tests based on their assigned markers. For example, you can mark tests as smoke, regression, database, etc., and run only specific categories when needed.

To use custom markers, you need to register them in the pytest.ini file to avoid warnings.

Example Code

 import pytest

 @pytest.mark.smoke
 def test_function_1():
 assert 2 + 2 == 4

 @pytest.mark.regression
 def test_function_2():
 assert "hello".upper() == "HELLO"

 @pytest.mark.database
 def test_function_3():
 assert len([1, 2, 3]) == 3
 

Running Tests by Marker

You can run tests with a specific marker using the -m option:

 pytest -m smoke
 

Registering Custom Markers

To avoid warnings, register custom markers in the pytest.ini file:

 [pytest]
 markers =
 smoke: Marks tests as smoke tests
 regression: Marks tests as regression
 database: Marks tests as database related
 

Using pytest.mark, you can better manage your test cases by grouping them into meaningful categories.