Pragmatic Unit Testing in Java 8 with JUnit

More on @Before and @After (Common Initialization and Cleanup)

In Chapter 2, ​Getting Real with JUnit​, you learned how to eliminate duplicate initialization across tests by using an @Before method (sometimes referred to as a setup method).

As you add more tests for a given set of related behaviors, you’ll realize that many of them have the same initialization needs. You’ll want to take advantage of the @Before method to help ensure that your tests don’t become a maintenance nightmare of redundant code.

It’s important to understand the order in which JUnit executes @Before and @Test methods. Here’s a small example: