@Before
  public void setUp() {

    coreService = createMock(CoreService.class);
    expect(coreService.registerApplication(appId.name())).andReturn(appId).anyTimes();
    replay(coreService);

    provider.cfgService = new ComponentConfigAdapter();
    provider.coreService = coreService;

    provider.providerRegistry = hostRegistry;
    provider.topologyService = topoService;
    provider.packetService = packetService;
    provider.deviceService = deviceService;
    provider.hostService = hostService;

    provider.activate(CTX_FOR_NO_REMOVE);
  }