JUnit in Action, Third Edition

14 JUnit 5 extension model

This chapter covers

• Creating JUnit 5 extensions
• Implementing JUnit 5 tests using available extension points
• Developing an application with tests extended by JUnit 5 extensions

The wheel is an extension of the foot, the book is an extension of the eye, clothing an extension of the skin, electric circuitry an extension of the central nervous system.

--Marshall McLuhan

In chapter 4, we demonstrated ways to extend the execution of tests. We examined JUnit 4 rules and JUnit 5 extensions face to face, and we analyzed how to migrate from the old JUnit 4 rules to the new extension model developed by JUnit 5. We also emphasized a few well-known extensions, such as MockitoExtension and SpringExtension. In chapter 8, we implemented ...