我正在嘗試為這個(gè)函數(shù)的悲慘路徑編寫一個(gè)測(cè)試：const awaitFirstStreamForPage = async page => {  try {    await page.waitForSelector('[data-stream="true"]', {      timeout: MAX_DELAY_UNTIL_FIRST_STREAM,    })  } catch (e) {    throw new Error(`no stream found for ${MAX_DELAY_UNTIL_FIRST_STREAM}ms`)  }}我設(shè)法編寫了一個(gè)通過(guò)的測(cè)試，但它需要 10 秒才能運(yùn)行，因?yàn)樗鼘?shí)際上是在等待測(cè)試完成。describe('awaitFirstStreamForPage()', () => {  it('given a page and no active stream appearing: should throw', async () => {    jest.setTimeout(15000)    const browser = await puppeteer.launch({ headless: true })    const page = await getPage(browser)    let error    try {      await awaitFirstStreamForPage(page)    } catch (err) {      error = err    }    const actual = error.message    const expected = 'no stream found for 10000ms'    expect(actual).toEqual(expected)    await browser.close()    jest.setTimeout(5000)  })})可能有一種方法可以使用 Jest 的假計(jì)時(shí)器來(lái)解決它，但我無(wú)法讓它工作。這是我最好的嘗試：const flushPromises = () => new Promise(res => process.nextTick(res))describe('awaitFirstStreamForPage()', () => {  it('given a page and no active stream appearing: should throw', async () => {    jest.useFakeTimers()    const browser = await puppeteer.launch({ headless: true })    const page = await getPage(browser)    let error    try {      awaitFirstStreamForPage(page)      jest.advanceTimersByTime(10000)      await flushPromises()    } catch (err) {      error = err    }    const actual = error.message    const expected = 'no stream found for 10000ms'    expect(actual).toEqual(expected)    await browser.close()    jest.useRealTimers()  })})失敗并拋出(node:9697) UnhandledPromiseRejectionWarning: Error: no stream found for 10000ms即使我將失敗的函數(shù)包裝在一個(gè)try/catch. 你如何使用假計(jì)時(shí)器測(cè)試這樣的功能？