public LocalResolver(final Configuration conf, final Router routerService) {
    super(conf, routerService);
  }
@Test
  @SuppressWarnings("unchecked")
  public void testLocalResolver() throws IOException {

    // Mock the subcluster mapping
    Configuration conf = new Configuration();
    Router router = mock(Router.class);
    StateStoreService stateStore = mock(StateStoreService.class);
    MembershipStore membership = mock(MembershipStore.class);
    when(router.getStateStore()).thenReturn(stateStore);
    when(stateStore.getRegisteredRecordStore(any(Class.class)))
        .thenReturn(membership);
    GetNamenodeRegistrationsResponse response =
        GetNamenodeRegistrationsResponse.newInstance();
    // Set the mapping for each client
    List<MembershipState> records = new LinkedList<>();
    records.add(newMembershipState("client0", "subcluster0"));
    records.add(newMembershipState("client1", "subcluster1"));
    records.add(newMembershipState("client2", "subcluster2"));
    response.setNamenodeMemberships(records);
    when(membership.getNamenodeRegistrations(
        any(GetNamenodeRegistrationsRequest.class))).thenReturn(response);

    // Mock the client resolution: it will be anything in sb
    StringBuilder sb = new StringBuilder("clientX");
    LocalResolver localResolver = new LocalResolver(conf, router);
    LocalResolver spyLocalResolver = spy(localResolver);
    doAnswer((Answer<String>) invocation -> sb.toString()
        ).when(spyLocalResolver).getClientAddr();

    // Add the mocks to the resolver
    MultipleDestinationMountTableResolver resolver =
        new MultipleDestinationMountTableResolver(conf, router);
    resolver.addResolver(DestinationOrder.LOCAL, spyLocalResolver);


    // We point /local to subclusters 0, 1, 2 with the local order
    Map<String, String> mapLocal = new HashMap<>();
    mapLocal.put("subcluster0", "/local");
    mapLocal.put("subcluster1", "/local");
    mapLocal.put("subcluster2", "/local");
    MountTable localEntry = MountTable.newInstance("/local", mapLocal);
    localEntry.setDestOrder(DestinationOrder.LOCAL);
    resolver.addEntry(localEntry);

    // Test first with the default destination
    PathLocation dest = resolver.getDestinationForPath("/local/file0.txt");
    assertDestination("subcluster0", dest);

    // We change the client location and verify
    setClient(sb, "client2");
    dest = resolver.getDestinationForPath("/local/file0.txt");
    assertDestination("subcluster2", dest);

    setClient(sb, "client1");
    dest = resolver.getDestinationForPath("/local/file0.txt");
    assertDestination("subcluster1", dest);

    setClient(sb, "client0");
    dest = resolver.getDestinationForPath("/local/file0.txt");
    assertDestination("subcluster0", dest);
  }