You can learn more about unity testing at the following links:
- Unity Test Framework Manual documentation: https://docs.unity3d.com/Manual/testing-editortestsrunner.html
- Unity Test Framework package documentation: https://docs.unity3d.com/Packages/com.unity.test-framework@1.1/manual/index.html
- Unity Test Framework how-to pages: https://unity.com/how-to/unity-test-framework-video-game-development
- A website for the book The Art of Unit Testing (and lots of other learning resources associated with testing): http://artofunittesting.com/
- A great dual article tutorial about Unity testing by Tomek Paszek from Unity (talking about the old Unity test tools, but most of the content is still very relevant): https://blogs.unity3d.com/2014/06/03/unit-testing-part-2-unit-testing-monobehaviours/
- YouTube, where you can learn lots about Unity testing (and other topics) from Infalliblecode: https://www.youtube.com/infalliblecode
- CodeProject.com's introduction...
