todo-list.effects.spec.ts

todo-list.effects.spec.ts

    it('should fail and return an action with the error', () => {
      const action = new LoadTodoList();
      const error = new Error('some error') as any;
      const outcome = new TodoItemsLoadFailed(error);

      actions = hot('-a', { a: action });
      const response = cold('-#|', {}, error);
      todoListService.getTodos.and.returnValue(response);

      const expected = cold('--(b|)', { b: outcome });
      expect(effects.loadTodoList$).toBeObservable(expected);
    });