Python Testing with pytest

Running a Subset of Tests

I’ve talked about how you can place markers on tests and run tests based on markers. You can run a subset of tests in several other ways. You can run all of the tests, or you can select a single directory, file, class within a file, or an individual test in a file or class. You haven’t seen test classes used yet, so you’ll look at one in this section. You can also use an expression to match test names. Let’s take a look at these.

A Single Directory

To run all the tests from one directory, use the directory as a parameter to pytest:

$ cd /path/to/code/ch2/tasks_proj
$ pytest tests/func --tb=no
===================== test session starts ======================
collected 50 items

tests/func/test_add.py ...