Eclipse – JUnit tests in eclipse failing when run together

It depends on the JUnit version and what assert libraries you use.

• For JUnit5 and 4.13 see answer https://stackoverflow.com/a/2935935/2986984
• If you use assertJ or google-truth, see answer https://stackoverflow.com/a/41019785/2986984

The original answer for JUnit <= 4.12 was:

@Test(expected = IndexOutOfBoundsException.class)
public void testIndexOutOfBoundsException() {

    ArrayList emptyList = new ArrayList();
    Object o = emptyList.get(0);

}

Though answer https://stackoverflow.com/a/31826781/2986984 has more options for JUnit <= 4.12.

Reference :

• JUnit Test-FAQ

It’s actually quite easy to perform JUnit tests across multiple projects from within Eclipse. Have a look at Classpath Suite. It’s not with the standard JUnit runner, but you did not mention where that requirement came from, so I’m not sure whether this will affect you.

All the usage information is on that page, but to summarize:

1. Create an Eclipse project depending on all the projects you want to test.

2. Write a simple test suite including everything:

   @RunWith(ClasspathSuite.class)  
   public class MySuite {}