### Question:
DefaultRpcServiceLookup implements RpcServiceLookup { public Multimap<String, String> getServicesFor(String container, String host) { if (container == null || container.length() == 0 || host == null) { return ImmutableMultimap.<String, String>builder().build(); } Multimap<String, String> foundServices = containerServices.get(container); if (foundServices == null) { foundServices = fetcher.getServicesForContainer(container, host); if (foundServices != null) { setServicesFor(container, foundServices); } } if (foundServices == null) { foundServices = ImmutableMultimap.<String, String>builder().build(); } return foundServices; } @Inject  DefaultRpcServiceLookup(DefaultServiceFetcher fetcher,
      @Named("org.apache.shindig.serviceExpirationDurationMinutes")Long duration); Multimap<String, String> getServicesFor(String container, String host);  }### Answer:
@Test public void testGetServicesForContainer_Empty() throws Exception { String container = "ig"; Multimap<String, String> services = svcLookup.getServicesFor(container, host); assertEquals(0, services.size()); }
@Test public void testGetServicesForContainer_Null() throws Exception { String container = null; Multimap<String, String> services = svcLookup.getServicesFor(container, host); assertEquals(0, services.size()); }