如何模拟 Observable return angular 服务？

Question

this.variable = this.service.getMydata();

以上服务正在返回 Observable 并且我订阅的变量如下。

this.variable.subscribe(data => { My logic here});

如何在 angular 6 中对此进行正确的单元测试？

Answer 1

试试这个：

const mockResponse = {
  // ...
};

spyOn(service, 'getMydata').and.returnValue(of(mockResponse));

Answer 2

将服务和方法模拟为 return observable

    const mockService = {
       getMydata: {
          return of(<Response>)
       }
    }

   TestBed.configureTestingModule({
       declarations: [...],
       providers: [{provide: Service, useValue: mockService}]
   })

如何模拟 Observable return angular 服务？

How to mock the Observable return angular service?

observable

karma-runner

angular