我有一个组件,当用户登录时,路由到名为/dashboard
的网址我真的很难弄清楚为什么我会收到以下错误。
cannot read property 'args' of undefined
我一直在关注使用路由器进行测试的官方文档https://angular.io/docs/ts/latest/guide/testing.html#!#routed-component 但它似乎没有帮助。我的一半问题是我不太了解文档中的所有代码。这是我对路线的单元测试
beforeEach(async(()=>{
class AuthStub{
private loggedin: boolean = false;
login(){
return this.loggedin = true;
}
};
class RouterStub{
navigateByUrl(url:string){return url;}
}
TestBed.configureTestingModule({
declarations: [ HomePageContentComponent ],
providers:[
{provide: Auth, useClass:AuthStub},
{provide: Router, useClass: RouterStub}
]
})
.compileComponents()
}));
beforeEach(()=>{
fixture = TestBed.createComponent(HomePageContentComponent);
comp = fixture.componentInstance;
de = fixture.debugElement.query(By.css('.loginbtn'));
el = de.nativeElement;
fixture.detectChanges();
});
it('Should log in and navigate to dashboard', inject([Router],(router:Router)=>{
const spy = spyOn(router, 'navigateByUrl');
el.click();
const navArgs = spy.calls.first().args[0];
expect(navArgs).toBe('/dashboard');
}))
});
所以我的问题是这行代码是做什么的......
const navArgs = spy.calls.first().args[0];
我该如何解决我的问题?
已添加服务
@Injectable()
export class Auth {
lock = new Auth0Lock('fakefakefakefakefake', 'fake.auth0.com', {
additionalSignUpFields: [{
name: "address",
placeholder: "enter your address"
}],
theme: {
primaryColor:"#b3b3b3",
},
languageDictionary: {
title: "FAKE"
}
});
userProfile: any;
constructor(private router: Router) {
this.userProfile = JSON.parse(localStorage.getItem('profile'));
this.lock.on("authenticated", (authResult) => {
localStorage.setItem('id_token', authResult.idToken);
this.lock.getProfile(authResult.idToken, (error, profile) => {
if (error) {
alert(error);
return;
}
profile.user_metadata = profile.user_metadata || {};
localStorage.setItem('profile', JSON.stringify(profile));
this.userProfile = profile;
});
this.router.navigate(['/dashboard']);
});
}
public login(){
this.lock.show();
};
public authenticated() {
return tokenNotExpired();
};
public logout() {
localStorage.removeItem('id_token');
localStorage.removeItem('profile');
this.router.navigate(['/logout']);
};
}
答案 0 :(得分:5)
假设您有以下组件:
@Component({
selector: 'home-comp',
template: `<button (click)="login()" class="loginbtn">Login</button>
`
})
export class HomePageContentComponent {
constructor(private auth: Auth, private router: Router) { }
login() {
this.router.navigateByUrl(`/dashboard`);
}
}
在使用模拟版本替换真实Router
后的测试中:
{ provide: Router, useClass: RouterStub }
在你的情况下:
it('Should log in and navigate to dashboard', inject([Router],(router:Router)=>{
router
将是RouterStub
的实例。
然后你监视navigateByUrl
方法来观察它的被叫次数
const spy = spyOn(router, 'navigateByUrl');
所以当你点击.loginbtn
按钮router.navigateByUrl
正在运行时(参见上面的组件),spy
会增加calls
一些信息(例如,所谓的参数)
最后在这一行
const navArgs = spy.calls.first().args[0];
预计您的router.navigateByUrl
方法至少被调用一次,然后从第一次调用中传递参数。
这是 Live Example
可能你在某个地方出了问题而你的router.navigateByUrl
没有被执行。