Angular: 如何在 angular 单元测试中使用路由器

Question

我正在 angular 中编写测试用例。我写了一个条件if res.length === 1 redirect to the details page。 (this.router.navigate(['details', id]))。我从主体响应中对象的第一个数组中获取 id 作为 const id = res[0].id。这两行都没有包含在我的代码覆盖范围内。谁能告诉我哪里出错了？

我得到 Expected spy navigate to have been called with [ [ '/product-details', 'SAAASD0001' ] ] but it was never called.

app.component.spec.ts

let router = {navigate: jasmine.createSpy('navigate')};

TestBed.configureTestingModule({
  imports: [RouterTestingModule],
  providers: [
    { provide: Router, useValue: router }
  ]
})

it('should take data from store', () => {
  const mockData = [
      {
        id: '123',
        name: 'Stackoverlow',
      }
  ]
  expect(component.getList).toEqual(mockData);

  const productId = mockData[0].id;
  expect(router.navigate).toHaveBeenCalledWith(['/details', id]);
});

app.component.ts

  getList() {
    this.store
      .select('content', 'catalogue')
      .pipe(takeUntil(this.onDestroy$))
      .subscribe((res) => {
        Iif (res.length === 1) {
          // this line doesn't cover
          const id = res[0].id;
          // this line doesn't cover
          this.router.navigate(['details', id]);
        } else {
          this.list = category(res);
        }
      });
  }

Answer 1

在组件中制作 Router 和 Store public 并尝试：

TestBed.configureTestingModule({
  imports: [RouterTestingModule],
  providers: [Router,Store ]
})

it('should take data from store', () => {
  const response = [{id: 'val'}];
  spyOn(component.store,"select").and.returnValue(of(response));
  spyOn(component.router,"navigate").and.callThrough();
  component.getList();
  expect(router.navigate).toHaveBeenCalledWith(['/details', response[0].id]);
});

同样通过更改 const response = [{id: 'val'}];

覆盖 else 部分

Answer 2

将这个东西添加到您的导入中：

 RouterTestingModule.withRoutes([
          { path: 'path1', component: TestComponent1},
          { path: 'home', component: DashboardComponent }
        ]),

稍后在您的测试用例中：您可以监视路由器的 "Navigate"，并使用它重定向到导入中提到的任何组件。

spyOn(Router,"navigate").and.callthrough();
router.navigate([/path1]);

Angular: 如何在 angular 单元测试中使用路由器

Angular: How to use router in angular unit testing

javascript

unit-testing

typescript

karma-jasmine

angular