Function fetchItems

packages/react-query/src/__tests__/useInfiniteQuery.test.tsx:33–46

(
  page: number,
  ts: number,
  noNext?: boolean,
  noPrev?: boolean,
)

const pageSize = 10

const fetchItems = async (
  page: number,
  ts: number,
  noNext?: boolean,
  noPrev?: boolean,
): Promise<Result> => {
  await sleep(10)
  return {
    items: [...new Array(10)].fill(null).map((_, d) => page * pageSize + d),
    nextId: noNext ? undefined : page + 1,
    prevId: noPrev ? undefined : page - 1,
    ts,
  }
}

describe('useInfiniteQuery', () => {
  beforeEach(() => {