public void testGetTunLoader_with_none_defined() {
   try {
     tunInfo.getTunLoader();
     fail("Expected IllegalStateException");
   } catch (IllegalStateException e) {
     // expected
   }
 }
 public void testGetTunLoader() {
   DummyTunLoader tunLoader = new DummyTunLoader();
   tunInfo.setTunLoader(tunLoader);
   assertSame(tunLoader, tunInfo.getTunLoader());
 }