Mocking Static Blocks in Java

Question

My motto for Java is \"just because Java has static blocks, it doesn\'t mean that you should be using them.\" Jokes aside, there are a lot of tricks in Java that make testing a

Answer 1

This is going to get into more "Advanced" JMockit. It turns out, you can redefine static initialization blocks in JMockit by creating a public void $clinit() method. So, instead of making this change

public class ClassWithStaticInit {
  static {
    staticInit();
  }

  private static void staticInit() {
    System.out.println("static initialized.");
  }
}

we might as well leave ClassWithStaticInit as is and do the following in the MockClassWithStaticInit:

public static class MockClassWithStaticInit {
  public void $clinit() {
  }
}

This will in fact allow us to not make any changes in the existing classes.