Question

这是服务：

＆＃13;

import { Injectable } from '@angular/core';
import { Router, Event, NavigationStart, NavigationEnd, NavigationCancel, NavigationError } from '@angular/router';

@Injectable()
export class LoaderService {

  public shouldShowLoader: boolean = false;

  constructor(private router: Router) {
    router.events.subscribe((event: Event) => {
      this.navigationInterceptor(event);
    });
  }

    // Shows and hides the loading spinner during Event changes
    navigationInterceptor(event: Event): void {
        if (event instanceof NavigationStart) {
          this.shouldShowLoader = true;
        }
        else if (event instanceof NavigationEnd) {
          this.shouldShowLoader = false;
        }

        // Set loading state to false in both of the below events to hide the spinner in case a request fails
        else if (event instanceof NavigationCancel) {
          this.shouldShowLoader = false;
        }
        else if (event instanceof NavigationError) {
          this.shouldShowLoader = false;
        }
        else {
          this.shouldShowLoader = false;
        }
    }
}

＆＃13;

这是失败的测试：

＆＃13;

import { TestBed, inject } from '@angular/core/testing';
import { Router } from '@angular/router';
import { LoaderService } from './loader.service';

describe('LoaderServiceTest', () => {
    beforeEach(() => {
        TestBed.configureTestingModule({
            providers: [ LoaderService, Router ]
        });
    });
    
    it('#LoaderService should be defined', inject([LoaderService, Router], (service: LoaderService) => {
        expect(service).toBeDefined();
    }));

});

＆＃13;

不确定为什么会失败？谷歌搜索类似的问题，我只能找到Angular 2 beta的答案...我们正在使用最新的Angular 2 / 2.2.0

Angular 2 / Jasmine / Karma错误：错误：无法解析路由器的所有参数:(？，？，？，？，？，？，？，？）。在config / karma-shim.js中

0 个答案: