Function waitFor

test/lib/next-test-utils.ts:716–731

(
  millisOrCondition: number | (() => boolean)
)

}

export async function waitFor(
  millisOrCondition: number | (() => boolean)
): Promise<void> {
  if (typeof millisOrCondition === 'number') {
    return new Promise((resolve) => setTimeout(resolve, millisOrCondition))
  }

  return new Promise((resolve) => {
    const interval = setInterval(() => {
      if (millisOrCondition()) {
        clearInterval(interval)
        resolve()
      }
    }, 100)
  })
}

export async function startStaticServer(
  dir: string,