在angular2中使用ts-mockito来模拟getter

Question

我有服务

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

还有一个组件测试，我想模拟这个服务：

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

当测试运行时，我将undefined为id 。

是否可以通过mockito模拟吸气剂？

Answer 1

看起来它是TestBed.configureTestingModule工作原理。 它重新定义了作为useValue提供的所有依赖useValue

解决方案是使用useFactory ：

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