Integrate Hamcrest and Mockito with JUnit 5 for more sophisticated unit testing with assertions, simulations, and behavior verification using Mockito spies.

Unit testing forms the foundation of reliable and maintainable code. It helps developers validate individual components in isolation [...] ...

In the Preface for Effective Unit Testing: A Guide for Java Developers , author Lasse Koskela states that although the impetus for Effective Unit Testing was to "write a Java edition of Roy ...