209: Testing argparse Applications
15:53 Share

How do you test the argument parsing bit of an application that uses argparse?

This episode covers:

• Design for Test: Structuring your app or script so it's easier to test.
• pytest & capsys for testing stdout
• Adding debug and preview flags for debugging and testing
• And reverting to subprocess.run if you can't modify the code under test

Also, there's a full writeup and code samples available:

• Blog post: Testing argparse Applications) 
• Code Repo)

** Learn pytest**

• pytest is the number one test framework for Python.
• Learn the basics super fast with Hello, pytest!)
• Then later you can become a pytest expert with The Complete pytest Course)
• Both courses are at courses.pythontest.com)