Python Testing with pytest

Running Coverage on a Directory

We’ve been running coverage on an installed package, cards. But there’s a lot more to the Python world than just building installable packages. In addition to packages, we can ask coverage to pay attention to directories and files as well. Let’s take a look at running coverage on a directory.

In the ch9/some_code directory, we have a couple source code modules and a test module:

$ tree ch9/some_code
ch9/some_code
├── bar_module.py
├── foo_module.py
└── test_some_code.py

To demonstrate pointing coverage at a path instead package, let’s stay in the top-level code directory and run the tests from there:

$ pytest --cov=ch9/some_code ch9/some_code/test_some_code.py
========================= ...