Function prefetch

packages/react-query/src/__tests__/useQuery.test.tsx:3726–3732

()

      React.useEffect(() => {
        async function prefetch() {
          await queryClient.prefetchQuery({
            queryKey: key,
            queryFn: () => Promise.resolve('prefetched data'),
          })
          act(() => setPrefetched(true))
        }

        prefetch()
      }, [])