@Test
void testFilter() {

    Assertions.assertFalse(this.filter.isAllowGuestLogin());
    Assertions.assertEquals(PrincipalFormat.FQN, this.filter.getPrincipalFormat());
    Assertions.assertEquals(PrincipalFormat.BOTH, this.filter.getRoleFormat());
    Assertions.assertNull(this.filter.getFilterConfig());
    Assertions.assertNotNull(this.filter.getProvider());
    Assertions.assertTrue(this.filter.getAccessDeniedHandler() instanceof CustomAccessDeniedHandler);
}