next.js/test/e2e/app-dir/app-prefetch/app/revalidate-0/layout.js

import React from 'react'

export const revalidate = 0

export default async function Layout({ children }) {
  console.log('re-fetching in layout')
  const data = await fetch(
    'https://next-data-api-endpoint.vercel.app/api/random'
  )
  const randomNumber = await data.text()

  return (
    <div>
      <p id="random-number">{randomNumber}</p>

      {children}
    </div>
  )
}