app.component.spec.ts

import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { TestBed, async } from '@angular/core/testing';
import { Component, NgModule, NO_ERRORS_SCHEMA } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { RouterTestingModule } from '@angular/router/testing';

import { CoreModule } from '@app/core/core.module';
import { SharedModule } from '@app/shared/shared.module';
import { AppComponent } from './app.component';

const routes: Routes = [
  {
    path: '',
    loadChildren: './degree-planner/degree-planner.module#DegreePlannerModule',
  },
];

@Component({
  template: '<div>lazy-loaded</div>',
})
class LazyComponent {}

@NgModule({
  imports: [RouterModule],
  declarations: [LazyComponent],
})
class LazyModule {}

describe('AppComponent', () => {
  beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [
        CoreModule,
        SharedModule,
        RouterModule,
        BrowserAnimationsModule,
        RouterTestingModule.withRoutes(routes),
      ],
      schemas: [NO_ERRORS_SCHEMA],
      providers: [],
      declarations: [AppComponent],
    }).compileComponents();
  }));
  it('should create the app', async(() => {
    const fixture = TestBed.createComponent(AppComponent);
    const app = fixture.debugElement.componentInstance;
    expect(app).toBeTruthy();
  }));

  it('should render title in a router-outlet tag', async(() => {
    const fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    const compiled = fixture.debugElement.nativeElement;
    expect(compiled.querySelector('router-outlet').textContent).toBeDefined();
  }));
});