Function assertNext

app/test/unit/api-test.ts:18–50

(current: IPageInfo, expected: IPageInfo)

}

function assertNext(current: IPageInfo, expected: IPageInfo) {
  const headers = createHeadersWithNextLink(
    `/items?per_page=${current.per_page}&page=${current.page}`
  )

  const nextPath = getNextPagePathWithIncreasingPageSize(
    new Response(null, { headers })
  )

  assert(nextPath !== null)
  const { pathname, query } = URL.parse(nextPath, true)

  assert.equal(pathname, '/items')

  const per_page = parseInt(
    typeof query.per_page === 'string' ? query.per_page : '',
    10
  )
  const page = parseInt(typeof query.page === 'string' ? query.page : '', 10)

  assert.equal(per_page, expected.per_page)
  assert.equal(page, expected.page)

  // If getNextPagePathWithIncreasingPageSize has fiddled with the
  // page size or page number we want to ensure that the next page will
  // get us more items than what we've gotten thus far.
  if (current.per_page !== per_page || current.page !== page) {
    const receivedCurrent = current.per_page * current.page
    const receivedNext = per_page * page

    assert(receivedNext > receivedCurrent)
  }
}

describe('API', () => {
  describe('getNextPagePathWithIncreasingPageSize', () => {