JUnit 4 @BeforeClass & @AfterClass when using Suites

Question

When using this approach below, by setting up the jUnit with Suites. We got the problem when all @BeforeClass in every Testclass will be executed before any tests starts to

Answer 1

I'm not too familiar with @RunWith in JUnit, so I may have done something wrong, but I can't seem to replicate the behaviour you describe. With the class:

@RunWith(Suite.class)
@Suite.SuiteClasses( { FirstTest.class, SecondTest.class, ThirdTest.class })
public class AllTests {
    // empty
}

And FirstTest.java looking like this:

public class FirstTest {
    @BeforeClass
    public static void doBeforeClass() {
         System.out.println("Running @BeforeClass for FirstTest");
    }

    @Test
    public void doTest() {
        System.out.println("Running @Test in " + getClass().getName());
    }
}

... with SecondTest.java and ThirdTest.java pretty much the same. I get the test output:

Running @BeforeClass for FirstTest
Running @Test in FirstTest
Running @BeforeClass for SecondTest
Running @Test in SecondTest
Running @BeforeClass for ThirdTest
Running @Test in ThirdTest

This is with JUnit 4.5.0 (default JUnit in Eclipse 3.5.1) on Sun's JDK 1.6.0_12. Can you spot any difference in my example from yours? Perhaps a different JDK/JVM? I don't know enough about the internals of JUnit to know if these can be a factor.