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使用jest和jasmine大理石测试ngrx效果时出现问题

jasmine-marbles ngrx-effects ngrx angular

1

Szabolcs · 技术社区 · 8 年前

jest 和 jasmine-marbles 测试我的 ngrx-effects . 到目前为止还不错,但我有一个特殊的案例需要使用 withLatestFrom 访问 Store

@Effect()
createDataSourceSuccess$ = this.actions$
  .ofType<sourceActions.CreateDataSourceSuccess>(
    sourceActions.DataSourceActionTypes.CreateDataSourceSuccess
  )
  .pipe(
    map(action => action.dataSource),
    withLatestFrom(this.store.select(getSourceUploadProgress)),
    switchMap(([source, progress]: [DataSource, UploadProgress]) =>
     of(
        new sourceActions.StartSourceUploadProgress({
          id: source.fileId,
          uploadProgress: progress,
        })
      )
    )
  );

it('should return StartSourceUploadProgress for CreateDataSourceSuccess', () => {
  const dataSource = dataSources[0];
  const action = new dataSourceActions.CreateDataSourceSuccess(dataSource);
  const outcome = new dataSourceActions.StartSourceUploadProgress({
    id: dataSource.fileId,
    uploadProgress: null,
  });

  store.select = jest.fn(_selector => of(null));

  actions.stream = hot('-a-', { a: action });
  const expected = cold('--b', { b: outcome });

  expect(effects.createDataSourceSuccess$).toBeObservable(expected);
});

我还注意到我成功地为 商场 为了 Actions 因为其他的测试都很好。这个和其他的唯一区别是 商场 和 最晚从

最后这是我得到的错误输出:

 DataSourceEffects âº should return StartSourceUploadProgress for CreateDataSourceSuccess

    TypeError: You provided 'undefined' where a stream was expected. You can provide an Observable, Promise, Array, or Iterable.

有什么想法吗?

1 回复 | 直到 8 年前

1

2

Kliment Ru 8 年前

这个解决方案对我有用

it('should return StartSourceUploadProgress for CreateDataSourceSuccess', () => {
  const dataSource = dataSources[0];
  const action = new dataSourceActions.CreateDataSourceSuccess(dataSource);
  const outcome = new dataSourceActions.StartSourceUploadProgress({
    id: dataSource.fileId,
    uploadProgress: null,
  });

  actions.stream = hot('-a-', { a: action });
  const expected = cold('--b', { b: outcome });

  store.select = jest.fn().mockImplementationOnce(() => of(new SourceUploadProgress()));

  expect(effects.createDataSourceSuccess$).toBeObservable(expected);
});