text: import {NO_ERRORS_SCHEMA} from '@angular/core';
  import {HeaderComponent} from './header.js';
  import {TestBed, async} from '@angular/core/testing';
  
  describe('header component', () => {
    beforeEach(async(() => {
      TestBed.configureTestingModule({
        declarations: [HeaderComponent],
        schemas: [NO_ERRORS_SCHEMA]
      }).compileComponents();
    }));
  
    it('should contains 2 links', () => {
      const fixture = TestBed.createComponent(HeaderComponent);
      fixture.detectChanges();
      expect(fixture.nativeElement.querySelectorAll('header a').length).toBe(2);
    });
  });
  