> For the complete documentation index, see [llms.txt](https://www.wptherightway.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.wptherightway.org/testing/theory.md).

# Testing Theory

- [Test Driven Development](https://www.wptherightway.org/testing/theory/tdd.md)
- [Unit Testing](https://www.wptherightway.org/testing/theory/unit_testing.md)
- [Behavior Driven Development](https://www.wptherightway.org/testing/theory/bdd.md)