app.component.spec.ts

import { TestBed } from "@angular/core/testing";
import { AppComponent } from "./app.component";
describe("AppComponent", async () => {
  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [AppComponent],
    }).compileComponents();
  });
  it("should create the app", async () => {
    const fixture = TestBed.createComponent(AppComponent);
    const app = fixture.debugElement.componentInstance;
    expect(app).toBeTruthy();
  });
  it(`should have as title 'app'`, async () => {
    const fixture = TestBed.createComponent(AppComponent);
    const app = fixture.debugElement.componentInstance;
    expect(app.title).toEqual("app");
  });
  it("should render title in a h1 tag", async () => {
    const fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    const compiled = fixture.debugElement.nativeElement;
    expect(compiled.querySelector("h1").textContent).toContain("Form Samples");
  });
});