Function staleTime

packages/query-core/src/__tests__/queryClient.test.tsx:1558–1567

(
        query: Query<
          { value: string; staleTime: number },
          Error,
          InfiniteData<{ value: string; staleTime: number }, number>
        >,
      )

      )
      const staleTimeSpy = vi.fn()
      const staleTime = (
        query: Query<
          { value: string; staleTime: number },
          Error,
          InfiniteData<{ value: string; staleTime: number }, number>
        >,
      ) => {
        staleTimeSpy()
        return query.state.data?.pages[0]?.staleTime ?? 0
      }

      const result = await queryClient.infiniteQuery({
        queryKey: key,