Helper method to use DOM Testing Library inside frames

helper.ts

async function getFrameDocument(frame: Frame): Promise<ElementHandle> {
  const documentHandle = await frame.evaluateHandle<Node>('document')
  const document = documentHandle.asElement()
  if (!document) {
    throw new Error('Failed to find Document in frame')
  }
  return document
}

async function getQueriesByFrame(frame: Frame) {
  const frameDocument = await getFrameDocument((frame as unknown) as Frame)
  const frameQueries = getQueriesForElement(frameDocument)
  return frameQueries
}