How do I Mock RouterStateSnapshot for a Router Guard Jasmine test

Question

I have a simple router guard and I am trying to test the canActivate( route: ActivatedRouteSnapshot, state: RouterStateSnapshot ). I can create the ActivatedRouteSn

Answer 1

I needed to get the data in the route to test for user roles in my guard, so I mocked it this way:

class MockActivatedRouteSnapshot {
    private _data: any;
    get data(){
       return this._data;
    }
}

describe('Auth Guard', () => {
   let guard: AuthGuard;
   let route: ActivatedRouteSnapshot;

   beforeEach(() => {
      TestBed.configureTestingModule({
         providers: [AuthGuard, {
            provide: ActivatedRouteSnapshot,
            useClass: MockActivatedRouteSnapshot
        }]
      });
      guard = TestBed.get(AuthGuard);
  });

  it('should return false if the user is not admin', () => {
     const expected = cold('(a|)', {a: false});

     route = TestBed.get(ActivatedRouteSnapshot);
     spyOnProperty(route, 'data', 'get').and.returnValue({roles: ['admin']});

     expect(guard.canActivate(route)).toBeObservable(expected);
  });
});