ngrx_testing_mock_service_error_test.ts

  it('can handle fetching data errors', () => {
    const source = cold('a', { a: { type: actions.DATA_FETCH } });
    const service = createServiceStub(new Error('Error occurred!'));
    const effects = new AppServiceEffect(new Actions(source), service);

    const expected = cold('a', { a: { type: actions.DATA_FETCH_FAILED } });
    expect(effects.fetchAppData$).toBeObservable(expected);
  });