Question

我正试图模仿'Tour of Heroes' Angular 2 Tutorial的英雄组件。但我不知道如何模拟路由器，这是实例化HeroesComponent所必需的。我尝试使用Jasmine创建一个Spy，但这不起作用，因为它缺少属性'RootComponentType'。

我该如何做到这一点？

import {HeroesComponent} from "./heroes.component";
import {Router} from "@angular/router-deprecated";
import {HeroService} from "./hero.service";


describe('HeroesComponent', () => {
    let heroes:HeroesComponent;
    let router:Router;
    let service:HeroService;
    beforeEach(() => {
        router = jasmine.createSpyObj('Router', ['navigate']);
        service = new HeroService(/* I will care about this later */);
        heroes = new HeroesComponent(router, service);
    });
    it('should be defined', () => {
        expect(heroes).toBeDefined();
    });
});

现在正在运作：

describe('HeroesComponent', () => {
    let router:any;
    let heroesComponent:HeroesComponent;
    let service:HeroService;

    beforeEach(() => {
        router = new class {
            navigate = jasmine.createSpy("navigate");
        };
        heroesComponent = new HeroesComponent(router, service);
    });
    it('should be defined', () => {
        expect(heroesComponent).toBeDefined();
    });
});

Answer 1

您可以直接在导航方法上创建间谍。

在DI中使用addProviders：

beforeEach(() => addProviders([
{ 
    provide: Router, 
    useClass: class { navigate = jasmine.createSpy("navigate"); }
}]));

直接初始化组件：

let router;
let heroesComponent;

beforeEach(() => {
    router = new class { navigate = jasmine.createSpy("navigate"); };
    heroesComponent = new HeroesComponent(router);
});

使用Angular 2模拟组件

1 个答案: