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我的组件监听 ngrx/data 实体的变化

  servicesNames: Map<number, string> = new Map();
        ... 
  ngOnInit(): void {   
        this.servicesService.entities$.subscribe((servicesNames: ServiceListShortI[]) => {
              servicesNames.forEach((serviceNames: ServiceListShortI) => {
                this.servicesNames.set(serviceNames.si, serviceNames.sn);
              });
            });
  }

现在我想测试 servicesNames 是否使用 Jasmine 更新 onInit 操作。只是部分覆盖 ngRx/data 并提供新的实体更改，以便它会被 entites$ 侦听器检测到。然后的问题是如何设置存根/模拟/任何东西来 ngrx/数据实体 $ 使用 ngrx 循环触发新的存根值。

这是我的规格文件：

 const initialState = {
    Service: {
      entities: []
    },  
  };

 beforeEach(async () => {
    await TestBed.configureTestingModule({
      declarations: [ServiceComponent],
      imports: [
        RouterTestingModule.withRoutes(routes),
        HttpClientTestingModule,
        EffectsModule.forRoot([]),
        StoreModule.forRoot({}),
        EntityDataModule.forRoot(entityConfig),
      ],
      providers: [
        provideMockStore({
          initialState
        }),
      ]
    })
      .compileComponents();
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(ServiceComponent);
    component = fixture.componentInstance;
    store = TestBed.inject(MockStore);
    servicesService = TestBed.inject(ServiceEntityService);
    fixture.detectChanges();
  });

  it("regions entity should return list of regions names", async () => {
    const storeState = store.select('Service').subscribe(store => console.log(store));
    fixture.detectChanges();
    store.setState({
      Service: {
        entities: [
            { "si": 1, "sn": "my service name" },
        ]
      }
    });

    fixture.detectChanges();
    // WHAT ACTION HERE TO trigger entities$ WITH FAKE/STUBED data
    expect(component.servicesNames.get(0)).toBeDefined()
  });
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