src/app/app.spec.ts

@@ -0,0 +1,25 @@
+import { provideZonelessChangeDetection } from '@angular/core';
+import { TestBed } from '@angular/core/testing';
+import { App } from './app';
+
+describe('App', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [App],
+      providers: [provideZonelessChangeDetection()]
+    }).compileComponents();
+  });
+
+  it('should create the app', () => {
+    const fixture = TestBed.createComponent(App);
+    const app = fixture.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it('should render title', () => {
+    const fixture = TestBed.createComponent(App);
+    fixture.detectChanges();
+    const compiled = fixture.nativeElement as HTMLElement;
+    expect(compiled.querySelector('h1')?.textContent).toContain('Hello, angular-tour-of-heroes');
+  });
+});

src/app/app.ts

@@ -4,9 +4,9 @@ import { RouterOutlet } from '@angular/router';
 @Component({
   selector: 'app-root',
   imports: [RouterOutlet],
-  templateUrl: './app.component.html',
-  styleUrl: './app.component.scss'
+  templateUrl: './app.html',
+  styleUrl: './app.scss'
 })
 export class App {
   protected title = 'angular-tour-of-heroes';
-}
+}

src/main.ts

@@ -1,6 +1,6 @@
 import { bootstrapApplication } from '@angular/platform-browser';
 import { appConfig } from './app/app.config';
-import { App } from './app/app.component';
+import { App } from './app/app';
 
 bootstrapApplication(App, appConfig)
   .catch((err) => console.error(err));