spyOn函数不被称为Jasmine Angular 2

时间:2017-10-04 10:22:01

标签: javascript angular jasmine

在我的Angular组件的设置中,我有一个函数:

populateForm(id:String, index:number){
    let blogs = this.blogsService.returnBlogs()
    blogs.map((blog:Blog)=>{
    blog._id === id ? this.blogsService.populateForm.next({blog:blog, index:index}) : blog._id = blog._id;

   })
  }

我已经设置了一个按钮点击测试,它调用了一个调用returnBlogs函数的populateForm函数,该函数从一个服务中获取一个数组来操作。

但我在使用returnBlogs函数监视时遇到了麻烦:

it('Should be able to click element and call PopulateForm function with correct parameters', () => {
    let blogs = [{_id1: 'xyz', title: 'title1', vidUrl: 'XpiipWULkXk'}, {_id1: 'abc', title: 'title2', vidUrl: 'XpiipWULkXk'}]
        blogsService = TestBed.get(BlogsService)
        component.blogs = blogsTest
        fixture.detectChanges();
    let spy =  spyOn(blogsService, 'returnBlogs').and.returnValue(blogs);

    let domEl = fixture.nativeElement.querySelector('.blog-thumb');
        domEl.click();
        expect(component.populateForm).toHaveBeenCalledWith('xyz', 1);
        expect(spy).toHaveBeenCalled();
  });

我收到错误:

  

预期的间谍返回博客已被调用。

任何指示都会受到赞赏,我试图掌握应该和不应该测试的内容

1 个答案:

答案 0 :(得分:0)

我已经使用了以下内容:

  it('Should be able to click element and call PopulateForm function with correct parameters', () => {
    let blogs = [{_id1: 'xyz', title: 'title1', vidUrl: 'XpiipWULkXk'}, {_id1: 'abc', title: 'title2', vidUrl: 'XpiipWULkXk'}]
        blogsService = TestBed.get(BlogsService)
        component.blogs = blogsTest
        fixture.detectChanges();
        let spy =  spyOn(blogsService, 'returnBlogs').and.returnValue(blogs);

    let domEl = fixture.nativeElement.querySelector('.blog-thumb');
        domEl.click();
        expect(component.populateForm).toHaveBeenCalledWith('xyz', 1);

        blogsService.returnBlogs()
        console.log(blogsService.returnBlogs())
        expect(blogsService.returnBlogs).toHaveBeenCalled();
  });

在设置间谍后显式调用blogsService.returnBlogs()。

记录后,它会返回我在脚本顶部设置的博客数组。

但我想:

spyOn(blogsService, 'returnBlogs').and.returnValue(blogs)

调用函数,这是处理这种事情的正确方法吗?