Function queryFn

packages/react-query/src/__tests__/useInfiniteQuery.test.tsx:1717–1725

({ signal }: { signal?: AbortSignal })

    let cancelFn: Mock = vi.fn()

    const queryFn = ({ signal }: { signal?: AbortSignal }) => {
      const promise = new Promise<string>((resolve, reject) => {
        cancelFn = vi.fn(() => reject('Cancelled'))
        signal?.addEventListener('abort', cancelFn)
        sleep(1000).then(() => resolve('OK'))
      })

      return promise
    }

    function Inner() {
      const state = useInfiniteQuery({