Function setup

packages/runtime-core/__tests__/rendererComponent.spec.ts:117–123

()

  test('component child synchronously updating parent state should trigger parent re-render', async () => {
    const App = {
      setup() {
        const n = ref(0)
        provide('foo', n)
        return () => {
          return [h('div', n.value), h(Child)]
        }
      },
    }

    const Child = {