Question

我正在使用玩笑来创建一些集成测试来测试AWS Appsync订阅并获得回报

测试运行一秒钟后，Jest没有退出。

这通常意味着您的测试中没有停止异步操作。 >考虑使用--detectOpenHandles运行Jest来解决此问题`

我认为这是由于对Observable的回调操作之一使用了async函数。

如何确保等待next的可观察操作并且已清理所有内容？

这是订阅设置

this._onCreateEventSubscriptionManager.watcher?.subscribe(
  {
    complete: () => {
      console.log('Completed onCreateEvent subscription')
      // Subscription was terminated. Notify the subscribers.
      this._onCreateEventSubscriptionManager.connectionStatusChanged(
        ConnectionState.Disconnected,
      )
    },
    error: (error) => {
      console.log('Failed to update a subscription', error)
      //Notify the subscribers.
      this._onCreateEventSubscriptionManager.connectionStatusChanged(
        ConnectionState.Disconnected,
      )
    },
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    next: async (result: any): Promise<void> => {
      console.log('executing onCreateEvent subscription', result)
      const data = (result.data as OnCreateEventSubscription)?.onCreateEvent
      if (!data) {
        throw new FatalError(
          'onCreateEvent subscription response contained error',
        )
      } else {
        console.log('onCreateEvent subscription worked', data)
        const cachedItems = await this.apiClient.getCachedQueryEvents()
        ...
      }
      return Promise.resolve()
    },
  },
)

这是开玩笑的测试

function delay(ms: number) {
 console.log(`Waiting ${ms} milleseconds...`)
 return new Promise((resolve) => setTimeout(resolve, ms))
}

describe('createEvent(), () => {
   it('should subscribe to create event', async () => {
  
    // Setup subscriber
    const subscriber = new MySubscriber()
    client.subscribe('1', ChangeType.Create, subscriber)

    await delay(5000)

    expect(subscriber.connectionState).toBe(ConnectionState.Connected)

    //Create new item
    const id = uuid.v4()
    const newItem = new Item()
    newItem.title = `dummy_title_${id}`
    newItem.firstName = `dummy_first_name_${id}`
    newItem.lastName = `dummy_last_name_${id}`

    const createdItem = await client.createItem(newItem)

    await delay(5000)

    expect(createdItem.title).toBe(`dummy_title_${id}`)
    expect(createdItem.firstName).toBe(`dummy_first_name_${id}`)
    expect(createdItem.lastName).toBe(`dummy_last_name_${id}`)

    expect(subscriber.changeType).toBe(ChangeType.Create)
    expect(subscriber.item?.id).toBeTruthy()

    client.unsubscribeAll()

    await delay(5000)
    }, 120000)
  })
})

此客户端unsubscribeAll（）执行以下操作

this._onCreateEventSubscriptionManager.subscription?.unsubscribe()
this._onCreateEventSubscriptionManager.watcher = undefined
this._onCreateEventSubscriptionManager.subscription = undefined

具有异步功能和Jest集成测试的AWS Appsync订阅

0 个答案: