在angular2中使用ts-mockito來模擬getter

Question

我有服務

 @Injectable() export class MyService { private _id: string; get id(): string { return this._id; } } 

還有一個組件測試，我想模擬這個服務：

 let myServiceMock = mock<MyService>(MyService); when(myServiceMock.id).thenReturn('mockId'); TestBed.configureTestingModule({ imports: [ MyModule ], providers: [ { provide: MyService, useValue: instance(myServiceMock) } ] }); 

當測試運行時，我將undefined為id 。

是否可以通過mockito模擬吸氣劑？

Answer 1

看起來它是TestBed.configureTestingModule工作原理。 它重新定義了作為useValue提供的所有依賴useValue

解決方案是使用useFactory ：

 let myServiceMock = mock<myServiceMock>(MyService); when(myServiceMock.id).thenReturn('mockId'); TestBed.configureTestingModule({ imports: [ MyModule ], providers: [ { provide: MyService, useFactory: () => instance(myServiceMock) } ] });