If you just execute Test1, then JUnit doesn't know about TestSuite, so @BeforeClass is not picked up. You can add a @BeforeClass to Test1 that calls TestSuite.setup(). That will also require adding a static flag in TestSuite so it only executes once.
@RunWith(Suite.class)
@SuiteClasses({ Test1.class, Test2.class })
public class TestSuite {
private static boolean initialized;
@BeforeClass
public static void setup (){
if(initialized)
return;
initialized = true;
System.out.println("setup");
// essential stuff for Test1#someTest
}
public static class Test1{
@BeforeClass
public static void setup (){
TestSuite.setup();
}
@Test
public void someTest(){
System.out.println("someTest");
}
}
}