Python Testing with pytest

Running a Subset of Tests

In the previous section, we used test classes to be able to run a subset of tests. Running just a small batch of tests is handy while debugging or if you want to limit the tests to a specific section of the code base you are working on at the time.

pytest allows you to run a subset of tests in several ways:

Subset	Syntax
Single test method	pytest path/test_module.py::TestClass::test_method
All tests in a class	pytest path/test_module.py::TestClass
Single test function	pytest path/test_module.py::test_function
All tests in a module	pytest path/test_module.py
All tests in a directory	pytest path
Tests matching a name pattern	pytest -k pattern
Tests by marker	Covered in Chapter 6, ​Markers​.

We’ve used everything but pattern and marker ...