• Mastering flask web development, 2nd edition
• Nice blog about unittest and coverage https://www.patricksoftwareblog.com/tag/coverage/
• Flask apispec https://everttimberg.io/blog/flask-api-spec/
• Pytest https://semaphoreci.com/community/tutorials/testing-python-applications-with-pytest
• Rest API with pytest (TDD) https://www.maxongzb.com/building-restful-api-with-flask-postman-and-pytest-part-3-read-time-20-mins/
• Minimal flask example (using apispec) https://github.com/matdoering/minimal-flask-example https://www.datascienceblog.net/post/programming/flask-api-development/
Apispec using ReDoc (a single, minified JS) https://becominghuman.ai/documenting-your-flask-powered-api-like-a-boss-b423a7c0f45e