组件间谍的单元测试存储

这是将 Store 作为依赖项的组件的单元测试。在这里，我们可以使用具有默认初始状态的存储，同时防止它在调用 store.dispatch() 时实际调度操作。

import {TestBed, async} from '@angular/core/testing';
import {AppComponent} from './app.component';
import {DumbComponentComponent} from "./dumb-component/dumb-component.component";
import {SmartComponentComponent} from "./smart-component/smart-component.component";
import {mainReducer} from "./state-management/reducers/main-reducer";
import {StoreModule} from "@ngrx/store";
import {Store} from "@ngrx/store";
import {Observable} from "rxjs";

describe('AppComponent', () => {
  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [
        AppComponent,
        SmartComponentComponent,
        DumbComponentComponent,
      ],
      imports: [
        StoreModule.provideStore({mainReducer})
      ]
    });

  });

  it('should create the app', async(() => {
    let fixture = TestBed.createComponent(AppComponent);
    let app = fixture.debugElement.componentInstance;

  var mockStore = fixture.debugElement.injector.get(Store);
  var storeSpy = spyOn(mockStore, 'dispatch').and.callFake(function () {
  console.log('dispatching from the spy!');
});
  

}));

});