vue/packages/server-renderer/test/fixtures/cache.js

import Vue from '../../../../dist/vue.runtime.common.js'

const app = {
  name: 'app',
  props: ['id'],
  serverCacheKey: props => props.id,
  render(h) {
    return h('div', '/test')
  }
}

export default () => {
  return Promise.resolve(
    new Vue({
      render: h => h(app, { props: { id: 1 } })
    })
  )
}