import { UserService } from './user.service';
import { Router } from '@angular/router';
import { TestBed, inject } from '@angular/core/testing';
import { AuthGuard } from './auth-guard.service';

describe('AuthGuard', () => {
  beforeEach(() => {
    const router = {
      navigate: jasmine.createSpy('navigate')
    };

    const user = {
      auth: false,
      login: () => this.auth = true,
      logout: () => this.auth = false,
      loggedIn: () => this.auth
    };

    TestBed.configureTestingModule({
      providers: [
        AuthGuard,
        { provide: UserService, useValue: user },
        { provide: Router, useValue: router }
      ],
    });
  });

  it('should be able to activate when user is logged in, and prevent it otherwise',
    inject([AuthGuard, UserService, Router], (service: AuthGuard, user: UserService, router: Router) => {
      // user is not authenticated
      user.logout();
      expect(user.loggedIn()).toBe(false);
      const canActivate = service.canActivate(<any>{}, <any>{});
      expect(canActivate).toBe(false);
      expect(router.navigate).toHaveBeenCalledTimes(1);
      expect(router.navigate).toHaveBeenCalledWith(['/auth/login']);
    }));

  it('should be able to activate when user is logged in, and prevent it otherwise',
    inject([AuthGuard, UserService, Router], (service: AuthGuard, user: UserService, router: Router) => {
      // user is authenticated
      user.login(null, null);
      expect(user.loggedIn()).toBe(true);
      const canActivate = service.canActivate(<any>{}, <any>{});
      expect(canActivate).toBe(true);
      expect(router.navigate).toHaveBeenCalledTimes(0);
    }));
});