Python Testing Tutorial

This tutorial helps you to learn automated testing in Python using the pytest framework.

Goal: Count Words in Moby Dick

Captain Ahab was vicious because Moby Dick, the white whale, had bitten off his leg. So the captain set sail for a hunt. For months he was searching the sea for the white whale. The captain finally attacked the whale with a harpoon. Unimpressed, the whale devoured captain, crew and ship. The whale won.

Herman Melville’s book “Moby Dick” describes the epic fight between the captain of a whaling ship and a whale. In the book, the whale wins by eating most of the other characters. But does he also win by being mentioned more often?

In this course, you will test a program that is counting words in Melvilles book.

Preparations

clone the repository:

git clone https://github.com/krother/python_testing_tutorial.git

install pytest:

pip install pytest

Chapters

• Unit Tests
• Fixtures
• Parameterized Tests
• Organizing Tests
• Test Coverage

Appendix

• Quotes
• Recap Puzzle
• Instructions for Trainers

Links

• Python Testing Tutorial - by Kathryn Huff

• Introduction to pytest - by Michael Tom-Wing and Christie Wilson

• Test & Code Podcast - by Brian Okken

• The Clean Code Talks – Unit Testing

• Test-Driven-Development - by H.Percival

License

this tutorial was contributed to by Kristian Rother, Magdalena Rother, Daniel Szoska

Usable under the conditions of the Creative Commons Attribution License 4.0 (CC-BY 4.0). See creativecommons.org for details

Feedback and comments are welcome at: kristian.rother@posteo.de

Sources for this tutorial: github.com/krother/python_testing_tutorial.