I am new to Unit Testing in Angular. I got the karma setup with code coverage along with angular-cli . I have run the command ng-test and opened code coverage report. I saw 1x ,3x etc along with my code line numbers in that coverage report. Please find the my coverage report image.

Here is my test case code appponent.spec.ts

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

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

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

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

  it(`should have as title 'app works!'`, async(() => {
    let fixture = TestBed.createComponent(AppComponent);
    let app = fixture.debugElementponentInstance;
    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 didn't understand what is the importance of that 1x,2x,3x etc in my code report. Please help me in knowing the importance of that.

I am new to Unit Testing in Angular. I got the karma setup with code coverage along with angular-cli . I have run the command ng-test and opened code coverage report. I saw 1x ,3x etc along with my code line numbers in that coverage report. Please find the my coverage report image.

Here is my test case 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 didn't understand what is the importance of that 1x,2x,3x etc in my code report. Please help me in knowing the importance of that.

• javascript
• unit-testing
• angular
• istanbul
• karma-coverage

1 Answer 1

It represents the amount of times that line has been executed.

According to your code lets take a look at your title field:

It first gets executed: expect(app).toBeTruthy();

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

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

So that's why it says 3x at the left of it.