### Question:
AmbrySecurityServiceFactory implements SecurityServiceFactory { @Override public SecurityService getSecurityService() throws InstantiationException { return new AmbrySecurityService(frontendConfig, frontendMetrics, urlSigningService, new QuotaManager(frontendConfig)); } AmbrySecurityServiceFactory(VerifiableProperties verifiableProperties, ClusterMap clusterMap,
      AccountService accountService, UrlSigningService urlSigningService, IdSigningService idSigningService,
      AccountAndContainerInjector accountAndContainerInjector); @Override SecurityService getSecurityService();  }### Answer:
@Test public void getAmbrySecurityServiceFactoryTest() throws Exception { SecurityService securityService = new AmbrySecurityServiceFactory(new VerifiableProperties(new Properties()), new MockClusterMap(), null, null, null, null).getSecurityService(); Assert.assertNotNull(securityService); }