CLI applications & TDD: Never write scripts again
summary
Argues that throwaway scripts should become test-driven CLI apps and shows a real refactor: a messy workflow script is turned into a package with proper if __name__ == '__main__' guard, cli-test-helpers is used to run commands and simulate argv and env for functional tests, and examples use argparse, click, docopt side-by-side. Covers packaging with entry points, running the installed CLI in a venv, and driving coverage toward 100% so behavior and deployment are verifiable.
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chapters (8)
- 0:00Introduction to testing
- 5:02Agenda and goals
- 6:26Problems with raw scripts
- 9:15Refactoring and testing
- 19:23CLI library options
- 25:55Challenges in CLI testing
- 29:13Testing strategy and tools
- 32:26Deployment and conclusion
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