Environment.ts не работает при тестировании Angular 2

Пытаюсь написать простой тест в Angular 2, но получаю ошибку для environment.ts, как показано ниже.

ERROR in ./web/environments/environment.ts Module build failed: Error: web\environments\environment.ts is missing from the TypeScript compilation. Please make sure it is in your tsconfig via the 'files' or 'include' property.

app.component.ts

import { Component} from '@angular/core';
import { environment } from '../environments/environment';

@Component({
  selector: 'web-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {
  title = 'Test App'; 

  constructor() {
    console.info(environment);
  }  
}

app.component.spec.ts

import { AppComponent } from './app.component';

describe('AppComponent', () => {
  it(`should 1+1`, () => {
    expect(1 + 1).toEqual(2);  //Success
  });
  it('should have component ', () => {
    const component = new AppComponent();  //Throws error
    // expect(component).toBeTruthy();
  });
});

Любое предложение ?