You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: controller_helper.rb
    path of file: ./repos/danbooru/test/test_helpers
    
    the code of the file until where you have to start completion: module ControllerHelper
  # A custom Shoulda matcher that tests that a controller's index endpoint
  # responds to a search correctly. See https://thoughtbot.com/blog/shoulda-matchers.
  #
  # Usage:
  #
  #   # Tests that `/tags.json?search[name]=touhou` returns th
    
    def matches?(subject, &block)
      search_params = other_params.merge({ search: params })
      expected_items = @test_case.instance_eval(&@expected)

      @test_case.instance_eval do
        # calls e.g. "wiki_pages_path" if we're in WikiPagesControllerTest.
        index_url = send("#{subject.controller_path}_path")
        # Allows for different authorization levels to be used, instead of just anonymous
        if CurrentUser.user.present?
          get_auth index_url, CurrentUser.user, as: :json, params: search_params
        else
          get index_url, as: :json, params: search_params
        end

        # Don't continue processing if there was an error
        assert_response :success

        # Some fields like :updated_at do not get finalized until later, so allow lambda functions
        # to evaluate expressions like a sort after the network call has completed
        expected_items = expected_items.call if expected_items.respond_to?(:call)
        expected_ids = Array(expected_items).map(&:id)
        responded_ids = response.parsed_body.map { |item| item["id"] }
        assert_equal(expected_ids, responded_ids)
      end
    end