Function runTest

packages/react-router/tests/searchMiddleware.test.tsx:93–118

(
  router: AnyRouter,
  expectedSearch: { root: { value?: string }; posts: { value?: string } },
)

}

async function runTest(
  router: AnyRouter,
  expectedSearch: { root: { value?: string }; posts: { value?: string } },
) {
  render(<RouterProvider router={router} />)

  const postsLink = await screen.findByTestId('posts-link')
  expect(postsLink).toHaveAttribute('href')
  const href = postsLink.getAttribute('href')
  const linkSearchOnRoot = getSearchParamsFromURI(href!)
  checkLocationSearch(expectedSearch.root)
  expect(router.state.location.search).toEqual(expectedSearch.root)

  fireEvent.click(postsLink)

  const postHeading = await screen.findByTestId('posts-heading')
  expect(postHeading).toBeInTheDocument()
  expect(window.location.pathname).toBe('/posts')

  expect(await screen.findByTestId('search')).toHaveTextContent(
    expectedSearch.posts.value ?? '$undefined',
  )
  checkLocationSearch(expectedSearch.posts)
  expect(router.state.location.search).toEqual(expectedSearch.posts)
  return linkSearchOnRoot
}

function checkLocationSearch(search: object) {
  const parsedSearch = new URLSearchParams(window.location.search)