Test cases in inner classes with JUnit

Question

I read about Structuring Unit Tests with having a test class per class and an inner class per method. Figured that seemed like a handy way to organize the tests, so I tried it in our Java project. However, the tests in the inner classes doesn't seem to be picked up at all.

I did it roughly like this:

public class DogTests {     public class BarkTests     {         @Test         public void quietBark_IsAtLeastAudible() { }          @Test         public void loudBark_ScaresAveragePerson() { }     }      public class EatTests     {         @Test         public void normalFood_IsEaten() { }          @Test         public void badFood_ThrowsFit() { }     } } 

Does JUnit not support this, or am I just doing it wrong?

Answer 1

You should annontate your class with @RunWith(Enclosed.class), and like others said, declare the inner classes as static:

@RunWith(Enclosed.class) public class DogTests   {   public static class BarkTests   {     @Test     public void quietBark_IsAtLeastAudible() { }      @Test     public void loudBark_ScaresAveragePerson() { }   }    public static class EatTests   {     @Test     public void normalFood_IsEaten() { }      @Test     public void badFood_ThrowsFit() { }   } }