@Test
 public void testEnter_NoSubinvestigatorId() {
   action.setPersonAssociation(null);
   thrown.expect(NullPointerException.class);
   thrown.expectMessage("No Person Association selected for removal.");
   action.enter();
 }
 @Test
 public void testEnter_NoProfile() {
   action.setProfile(null);
   thrown.expect(NullPointerException.class);
   thrown.expectMessage(
       "User Profile does not exist! You must create a user profile before editing an person.");
   action.enter();
 }
 @Test
 public void testEnter_SubInvestigator() {
   assertEquals(ActionSupport.SUCCESS, action.enter());
 }