pytest-cov is a pytest plugin that helps produce coverage reports using Coverage.py.

In this episode, we'll discuss:

• what Coverage.py is
• why you should measure code coverage on both your source and test code
• what pytest-cov is
• extra features pytest-cov gives you over and above coverage.py
• and generally why using both is awesome

Links:

• coverage.py
• pytest-cov
• how to set up context reports
• Top pytest Plugins

Errata:

• I mentioned that Coverage has the ability to show context (which line is covered by which test) for the past year or so.
  • However, that feature was released in Oct 2018. coverage 5.0 alpha 
  • That's over 6 years. Oops. Sorry Ned.