Angular 单元测试中的 karma 代码覆盖率报告中的 1x 3x 等是什么意思

Angular单元测试中的Karma代码覆盖率报告解析

typescript
// sample.component.ts
export class SampleComponent {
  constructor(private authService: AuthService) {}
  getUserStatus(): string {
    if (this.authService.isLoggedIn()) {
      return 'User is logged in';
    } else {
      return 'User is not logged in';
    }
  }
}

typescript
// sample.component.spec.ts
import { TestBed, ComponentFixture } from '@angular/core/testing';
import { SampleComponent } from './sample.component';
import { AuthService } from './auth.service';
describe('SampleComponent', () => {
  let component: SampleComponent;
  let fixture: ComponentFixture;
  let authService: jasmine.SpyObj;
  beforeEach(() => {
    authService = jasmine.createSpyObj('AuthService', ['isLoggedIn']);
    TestBed.configureTestingModule({
      declarations: [SampleComponent],
      providers: [{ provide: AuthService, useValue: authService }],
    });
    fixture = TestBed.createComponent(SampleComponent);
    component = fixture.componentInstance;
  });
  it('should display user status', () => {
    authService.isLoggedIn.and.returnValue(true);
    const status = component.getUserStatus();
    expect(status).toBe('User is logged in');
  });
});