What does 1x 3x mean, etc. in karma code coverage report in Angular2 Unit testing?

Question

I am new to unit testing in Angular2. I got setup karmawith code coverage along with angular-cli. I ran the ng-test command and opened a code coverage report. I saw 1x, 3xetc. Together with the code line numbers in this coverage report. Please find an image of my coverage report.

Here is my test code app.component.spec.ts

/* tslint:disable:no-unused-variable */

import { TestBed, async } from '@angular/core/testing';
import { AppComponent } from './app.component';

describe('AppComponent', () => {
  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [
        AppComponent
      ],
    });
  });

  it('should create the app', async(() => {
    let fixture = TestBed.createComponent(AppComponent);
    let app = fixture.debugElement.componentInstance;
    expect(app).toBeTruthy();
  }));

  it(`should have as title 'app works!'`, async(() => {
    let fixture = TestBed.createComponent(AppComponent);
    let app = fixture.debugElement.componentInstance;
    expect(app.title).toEqual('app works!');
  }));

  it('should render title in a h1 tag', async(() => {
    let fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    let compiled = fixture.debugElement.nativeElement;
    expect(compiled.querySelector('h1').textContent).toContain('app works!');
  }));
});

I did not understand the importance of this 1x,2x,3x, etc. in my code report. Please help me in understanding the importance of this.

Answer 1

, .

title:

: expect(app).toBeTruthy();

: expect(app.title).toEqual('app works!');

-: expect(compiled.querySelector('h1').textContent).toContain('app works!');

, 3 .