Typescript 使用 routerLink 的 Angular 2 单元测试组件

您需要配置所有路由.对于测试，您可以使用@angular/router/testing中的RouterTestingModule，而不是RouterModule，在这里您可以设置一些模拟路由.您还需要将CommonModule从@angular/common导入*ngFor.下面是一个完整的通过测试

import { Component } from '@angular/core';
import { Router } from '@angular/router';
import { By } from '@angular/platform-browser';
import { Location, CommonModule } from '@angular/common';
import { RouterTestingModule } from '@angular/router/testing';
import { TestBed, inject, async } from '@angular/core/testing';

@Component({
  template: `
    <a routerLink="/settings/{{collName}}/edit/{{item._id}}">link</a>
    <router-outlet></router-outlet>
  `
})
class TestComponent {
  collName = 'testing';
  item = {
    _id: 1
  };
}

@Component({
  template: ''
})
class DummyComponent {
}

describe('component: TestComponent', function () {
  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [
        CommonModule,
        RouterTestingModule.withRoutes([
         { path: 'settings/:collection/edit/:item', component: DummyComponent }
        ])
      ],
      declarations: [ TestComponent, DummyComponent ]
    });
  });

  it('should go to url',
    async(inject([Router, Location], (router: Router, location: Location) => {

    let fixture = TestBed.createComponent(TestComponent);
    fixture.detectChanges();

    fixture.debugElement.query(By.css('a')).nativeElement.click();
    fixture.whenStable().then(() => {
      expect(location.path()).toEqual('/settings/testing/edit/1');
      console.log('after expect');
    });
  })));
});

使现代化

另一个选项是，如果您只想测试路由是否正确呈现，而不需要try 导航...

您只需导入RouterTestingModule个，无需配置任何路由

imports: [ RouterTestingModule ]

然后只需判断链接是否以正确的URL路径呈现，例如.

let href = fixture.debugElement.query(By.css('a')).nativeElement
    .getAttribute('href');
expect(href).toEqual('/settings/testing/edit/1');