在angular2，依赖注入中进行单元测试

花费时间与角度1后开始角度为2.没有单元测试这么多's more of a side project thing, I' m尝试至少开始OK ...我开始使用AngularClass中的示例，如果这有所不同 .

在 app.component.ts 中苦苦挣扎，其中包含我的导航位 . 这里模板的相关位：

<nav class="navbar navbar-light bg-faded">
  <div class="container">
    <div class="nav navbar-nav">
      <a class="navbar-brand" [routerLink]=" ['./'] ">Navbar</a>
      <loading class="nav-item nav-link pull-xs-right" [visible]="user === null"></loading>
  </div>
</div>
</nav>

<div class="container">
  <main>
    <router-outlet></router-outlet>
</main>
</div>

<footer>
  <hr>
  <div class="container">

</div>
</footer>

组件本身并不多：

import { Component, ViewEncapsulation } from '@angular/core';
import { AuthService } from './_services';
import { User } from './_models';
import { Loading } from './_components';

@Component({
    selector: 'app',
    encapsulation: ViewEncapsulation.None,
    template: require('./app.component.html'),
    styles: [
        require('./app.style.css')
    ]
})
export class App {
    user: User;

    constructor(private auth: AuthService) {

    }

    ngOnInit() {
        this.auth.getUser().subscribe(user =>  this.user = user);
    }
}

所有模块，组件和路由都通过App模块引导 . 如果需要可以发布 .

我必须为它编写的测试让我基本上连接了路由器的所有内容（所以看起来如此） . 首先， [routerLink] is not a native attribute of 'a' . 好的，我解决了 . 然后：

Error in ./App class App - inline template:3:6 caused by: No provider for Router!

所以，我连接路由器，只发现：

Error in ./App class App - inline template:3:6 caused by: No provider for ActivatedRoute!

我添加了，以找出：

Error in ./App class App - inline template:3:6 caused by: No provider for LocationStrategy!

到目前为止，测试看起来像：

import { inject, TestBed, async } from '@angular/core/testing';
import { AuthService } from './_services';
import { Router, RouterModule, ActivatedRoute } from '@angular/router';
import { AppModule } from './app.module';

// Load the implementations that should be tested
import { App } from './app.component';
import { Loading } from './_components';

describe('App', () => {
    // provide our implementations or mocks to the dependency injector
    beforeEach(() => TestBed.configureTestingModule({
        declarations: [App, Loading],
        imports: [RouterModule],
        providers: [
            {
                provide: Router,
                useClass: class {
                    navigate = jasmine.createSpy("navigate");
                }
            }, {
                provide: AuthService,
                useClass: class {
                    getAccount = jasmine.createSpy("getAccount");
                    isLoggedIn = jasmine.createSpy("isLoggedIn");
                }
            }, {
                provide: ActivatedRoute,
                useClass: class { }
            }
        ]
    }));

    it('should exist', async(() => {

        TestBed.compileComponents().then(() => {
            const fixture = TestBed.createComponent(App);

            // Access the dependency injected component instance
            const controller = fixture.componentInstance;

            expect(!!controller).toBe(true);
        });
    }));
});

我已经嘲笑输入了，这对我来说似乎不对 . 我错过了什么吗？是否有更智能的方法在测试中加载整个应用程序，而不是一直在每个依赖项中使用？