Angular：单元测试路由：预期“”为“/route”

我正在对我的 Angular 应用程序下的路由进行单元测试，

我的路线在 app.module.ts 下导入的特定模块中声明，

这是我的路由模块：

应用程序路由.module.ts

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';

import { LoginComponent } from './login/login.component';
import { WelcomeComponent } from './welcome/welcome.component';
import { CustomersListComponent } from './customer/customers-list/customers-list.component';
import { CustomerDetailComponent } from './customer/customer-detail/customer-detail.component';
import { ApplicationParametersComponent } from './superAdministrator/application-parameters/application-parameters.component';
import { InscriptionComponent } from './inscription/inscription.component';

const routes: Routes = [
  { path: '', redirectTo: '/login', pathMatch: 'full' },
  { path: 'login',  component: LoginComponent },
  { path: 'login/:keyWording',  component: LoginComponent },
  { path: 'welcome', component: WelcomeComponent },
  { path: 'customers-list', component: CustomersListComponent },
  { path: 'customer-create', component: CustomerDetailComponent },
  { path: 'customer-detail/:idCustomer', component: CustomerDetailComponent },
  { path: 'application-parameters', component: ApplicationParametersComponent },
  { path: 'inscription', component: InscriptionComponent }
];

@NgModule({
  imports: [ RouterModule.forRoot(routes) ],
  exports: [ RouterModule ]
})
export class AppRoutingModule {}

这是我的 app.module.ts （用于导入路由模块：

import { NgModule } from '@angular/core';

import { AppRoutingModule } from './app-routing.module';
import { SharedModule } from './../shared/shared.module';
import { LoginComponent } from './login/login.component';
import { WelcomeComponent } from './welcome/welcome.component';
import { AppComponent } from './app.component';
import { CustomerModule } from './customer/customer.module';
import { ApplicationParametersComponent } from './superAdministrator/application-parameters/application-parameters.component';
import { InscriptionComponent } from './inscription/inscription.component';

import { DxProgressBarModule } from 'devextreme-angular';

@NgModule({
  declarations: [
    AppComponent,
    LoginComponent,
    WelcomeComponent,
    ApplicationParametersComponent,
    InscriptionComponent
  ],
  imports: [
    AppRoutingModule, /* HERE IS THE ROUTING FILE */

    SharedModule,
    CustomerModule,
    DxProgressBarModule/*,
    BrowserAnimationsModule,
    BrowserModule*/
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

在我的测试文件下，我遵循了此博客中的教程：https://codecraft.tv/courses/angular/unit-testing/routing/ https://codecraft.tv/courses/angular/unit-testing/routing/

我的路由测试的测试文件如下：

import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { AppComponent } from './app.component';
// DevExtreme Module
import {DxProgressBarModule, DxTemplateModule} from 'devextreme-angular';
// Router Modules
import {RouterTestingModule} from '@angular/router/testing';
// Services and HTTP Module
import { SessionService } from './../shared/service';
import { HttpService } from './../shared/service';
import {HttpModule} from '@angular/http';
// Routs testing
import {Router, RouterModule} from '@angular/router';
import {fakeAsync, tick} from '@angular/core/testing';
import {Location} from '@angular/common';
import {LoginComponent} from './login/login.component';
import {WelcomeComponent} from './welcome/welcome.component';
import {ApplicationParametersComponent} from './superAdministrator/application-parameters/application-parameters.component';
import {InscriptionComponent} from './inscription/inscription.component';
import {CUSTOM_ELEMENTS_SCHEMA} from '@angular/core';
import {FormsModule} from '@angular/forms';


describe('Testing the application routes', () => {

  let location: Location;
  let router: Router;
  let fixture;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [RouterTestingModule, FormsModule , DxTemplateModule , HttpModule ],
      providers:    [SessionService , HttpService ],
      declarations: [
        AppComponent,
        LoginComponent,
        WelcomeComponent,
        ApplicationParametersComponent,
        InscriptionComponent
      ],
      schemas: [ CUSTOM_ELEMENTS_SCHEMA ]

    });

    router = TestBed.get(Router);
    location = TestBed.get(Location);

    fixture = TestBed.createComponent(AppComponent);
    router.initialNavigation();
  });

  it('navigate to "inscription" takes you to /inscription', fakeAsync(() => {
    router.navigate(['inscription']);
    tick();
    expect(location.path()).toBe('/inscription');
  }));
});

我的测试失败，表明这一点：

Expected '' to be '/inscription'.
    at Object.<anonymous> (webpack:///src/app/app-routing.spec.ts:52:28 <- src/test.ts:143891:33)
    at Object.<anonymous> (webpack:///~/@angular/core/@angular/core/testing.es5.js:348:0 <- src/test.ts:34691:26)
    at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:391:0 <- src/polyfills.ts:1546:26)
    at ProxyZoneSpec.Array.concat.ProxyZoneSpec.onInvoke (webpack:///~/zone.js/dist/proxy.js:79:0 <- src/test.ts:232357:39)

Ideas ??

您忘记导入路由到RouterTestingModule，在您的测试文件中。

你必须添加export关键字到您的const routes在你的AppRoutingModule文件，然后你可以import测试文件中的路由（并将它们添加到测试配置中）。

import {routes} from '...'; // I don't have the app-routing.module file path.
...
...
...
 beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [RouterTestingModule.withRoutes(routes), <-- I added the routes here.
                FormsModule , DxTemplateModule , HttpModule 
  ],
      providers:    [SessionService , HttpService ],
      declarations: [
        AppComponent,
        LoginComponent,
        WelcomeComponent,
        ApplicationParametersComponent,
        InscriptionComponent
      ],
      schemas: [ CUSTOM_ELEMENTS_SCHEMA ]

    });

    router = TestBed.get(Router);
    location = TestBed.get(Location);

    fixture = TestBed.createComponent(AppComponent);
    router.initialNavigation();
  });

如果你没有在路由器测试模块中加载路由，那么当你访问路由器时，它就无法知道要去哪里。navigate，因此它将返回到原始页面，并在控制台中出现错误。

您遵循的教程有一种非常奇怪的方式来处理路由，因为tick()是用来fakeAsync测试，这是一个真实的async一。所以你必须使用Promise<boolean>由返回路由器导航 https://angular.io/api/router/Router#navigate:

it('navigate to "inscription" takes you to /inscription', () => {
    router.navigate(['inscription']).then(() => {
        expect(location.path()).toBe('/inscription');
    });
});

如您所见，您还可以删除fakeAsync因为这不是假的，而是async call.

在 plunker 上查看 http://plnkr.co/edit/ZoFQi4NmWT0CF3d9z7BI?p=preview