class ActiveRecord::FixtureSet

def read_and_insert(fixtures_directory, fixture_files, class_names, connection) # :nodoc:
  fixtures_map = {}
  fixture_sets = fixture_files.map do |fixture_set_name|
    klass = class_names[fixture_set_name]
    fixtures_map[fixture_set_name] = new( # ActiveRecord::FixtureSet.new
      nil,
      fixture_set_name,
      klass,
      ::File.join(fixtures_directory, fixture_set_name)
    )
  end
  update_all_loaded_fixtures(fixtures_map)
  insert(fixture_sets, connection)
  fixtures_map
end