Angular 2單元測試：如何重寫@Inject（'Window'）private _window：Window構造函數依賴項？

Question

例如，我嘗試了以下方法：

beforeEach(async(() => {

    TestBed.configureTestingModule({
        declarations: [CmpBeingTested],
        providers: [ 
            {provide: window, useValue: window}

        ]
    });
}));

我無法覆蓋CmpBeingTested構造函數：

constructor(@Inject('Window') private _window: Window) { }

而且我不斷收到錯誤

沒有Window的提供者！

Answer 1

  beforeEach(async(() => {

        let windowMock: Window = { } as any;

        TestBed.configureTestingModule({
            declarations: [CmpBeingTested],
            providers: [ 
                { provide: 'Window', useFactory: (() => { return  windowMock; }) }

            ]
        });
    }));