@Test
public void testGetAllInterfaces() throws Exception {

	
	Class<?>[] classes = { B.class, D.class };
	Collection<Class<?>> cx = ServiceHelper.getAllInterfaces(classes);
	
	assertTrue (cx.contains(A.class));
	assertTrue (cx.contains(B.class));
	assertTrue (cx.contains(C.class));
	assertTrue (cx.contains(D.class));
	assertTrue (cx.size() == 4);
	
}