@Test
 public void testProvider() throws ClassNotFoundException {
   SecurityFilterProviderCollection provider = this.filter.getProvider();
   assertEquals(2, provider.size());
   assertTrue(
       provider.getByClassName("waffle.servlet.spi.BasicSecurityFilterProvider")
           instanceof BasicSecurityFilterProvider);
   assertTrue(
       provider.getByClassName("waffle.servlet.spi.NegotiateSecurityFilterProvider")
           instanceof NegotiateSecurityFilterProvider);
 }