it('should get a task by id', (done) => {

    _mockDispatcher = _scheduler.createColdObservable(
      Rx.ReactiveTest.onNext(10, {
        actionType: TASK_ACTIONS.GET_TASKS_RESPONSE,
        tasks: _mockTasks
      }));

    let tasksStore = new TasksStore(_mockDispatcher);

    tasksStore.getTaskById(5).subscribe(
      task => {
        chai.expect(task).to.not.be.undefined;
        chai.expect(task).to.deep.equal(_mockTasks[1]);
        done();
      }
    );

    _scheduler.advanceTo(25);

  });
 getUser: username => scheduler.createHotObservable(
   Rx.ReactiveTest.onNext(200, _usersMock['alice']))