Mastering Unit Testing Using Mockito and JUnit

Working with JUnit 4

JUnit is a unit testing framework for Java. It allows developers to unit test the code elegantly. Apparently, TestNG is cleaner than JUnit, but JUnit is far more popular than TestNG. JUnit has a better mocking framework support such as Mockito, which offers a custom JUnit 4 runner.

The latest version of JUnit (4.11) can be downloaded from https://github.com/junit-team/junit/wiki/Download-and-Install.

JUnit 4 is an annotation-based, flexible framework. Its predecessor has many downsides. The following are the advantages of JUnit 4 over its predecessor:

• Instead of inheriting from junit.framework.Testcase, any class can be a test class
• The setUp and tearDown methods are replaced by the @before and @after annotations
• Any public method ...