@Test
 public void isAdmin_for_user() {
   connectAsUser();
   assertFalse(SecurityUtils.isAdmin());
 }
 @Test
 public void isAdmin_for_admin() {
   connectAsAdmin();
   assertTrue(SecurityUtils.isAdmin());
 }
 @Test
 public void isAdmin_not_authenticated() {
   assertFalse(SecurityUtils.isAdmin());
 }