禁用Jest setTimeout mock [英] Disable Jest setTimeout mock

问题描述

我正在为依赖于websocket库的代码编写Jest测试。

I'm writing a Jest test for code that depends on a websocket library.

websocket库被模拟。我想发送一条消息，等待异步操作完成，然后检查响应。

The websocket library is mocked. I want to send a message, wait for async actions to complete, and check the response.

it('sends a message and gets a response', () => {
  processor(ws).sendMessage()  // do a bunch of async stuff, call websocket.sendMessage()
  setTimeout(() => {
    expect(ws.getResponse()).toEqual('all done')
  }, 100)
})

不幸的是因为Jest嘲笑setTimeout，setTimeout失败了。如果我运行 jest.runAllTimers（），则超时会立即发生，因此无法接收消息。

Unfortunately because Jest mocks setTimeout, setTimeout fails. If I run jest.runAllTimers(), the timeout happens instantaneously, so fails to pick up the message.

任何想法如何说服jest取消模拟setTimeout或Jasmine解决方法？

Any idea how to convince jest to unmock setTimeout, or a Jasmine workaround?

推荐答案

您可以在测试用例之前添加以下代码。它适用于Jest v14.1.0 -

You can add following code before test cases. It works for me in Jest v14.1.0 -

  jest.useRealTimers()

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