class RubyLsp::Requests::DiscoverTests

def initialize(global_state, document, dispatcher)
  super()
  @global_state = global_state
  @document = document
  @dispatcher = dispatcher
  @response_builder = ResponseBuilders::TestCollection.new #: ResponseBuilders::TestCollection
  @index = global_state.index #: RubyIndexer::Index
end

def perform
  uri = @document.uri
  # We normally only index test files once they are opened in the editor to save memory and avoid doing
  # unnecessary work. If the file is already opened and we already indexed it, then we can just discover the tests
  # straight away.
  #
  # However, if the user navigates to a specific test file from the explorer with nothing opened in the UI, then
  # we will not have indexed the test file yet and trying to linearize the ancestor of the class will fail. In
  # this case, we have to instantiate the indexer listener first, so that we insert classes, modules and methods
  # in the index first and then discover the tests, all in the same traversal.
  if @index.entries_for(uri.to_s)
    Listeners::TestStyle.new(@response_builder, @global_state, @dispatcher, @document.uri)
    Listeners::SpecStyle.new(@response_builder, @global_state, @dispatcher, @document.uri)
    Addon.addons.each do |addon|
      addon.create_discover_tests_listener(@response_builder, @dispatcher, @document.uri)
    end
    @dispatcher.visit(@document.ast)
  else
    @global_state.synchronize do
      RubyIndexer::DeclarationListener.new(
        @index,
        @dispatcher,
        @document.parse_result,
        uri,
        collect_comments: true,
      )
      Listeners::TestStyle.new(@response_builder, @global_state, @dispatcher, @document.uri)
      Listeners::SpecStyle.new(@response_builder, @global_state, @dispatcher, @document.uri)
      Addon.addons.each do |addon|
        addon.create_discover_tests_listener(@response_builder, @dispatcher, @document.uri)
      end
      # Dispatch the events both for indexing the test file and discovering the tests. The order here is
      # important because we need the index to be aware of the existing classes/modules/methods before the test
      # listeners can do their work
      @dispatcher.visit(@document.ast)
    end
  end
  @response_builder.response
end