scala

    val parser = new Parser {
      var builder: GraphBuilder = _
      var agency: File = _
      var stops: File = _
      var routes: File = _
      var trips: File = _
      var stopTimes: File = _
      var calendar: File = _
      var calendarDates: Option[File] = _
      var frequencies: Option[File] = _
      var transfers: Option[File] = _

      override def parse(
        builder: GraphBuilder, agency: File, stops: File, routes: File,
        trips: File, stopTimes: File, calendar: File,
        calendarDates: Option[File], frequencies: Option[File],
        transfers: Option[File]
      ) {
        this.builder = builder
        this.agency = agency
        this.stops = stops
        this.routes = routes
        this.trips = trips
        this.stopTimes = stopTimes
        this.calendar = calendar
        this.calendarDates = calendarDates
        this.frequencies = frequencies
        this.transfers = transfers
      }
    }
    val builder = new GraphBuilder

    it("should call #parse with all files when they can be found") {
      val dir = new File("data/test/gtfs/from_directory/full")
      def file(name: String) = new File(dir, name+".txt")
      def optFile(name: String) = Some(new File(dir, name+".txt"))

      val (
        agency, stops, routes, trips, stopTimes, calendar, calendarDates,
        frequencies, transfers
      ) = (
        file("agency"), file("stops"), file("routes"), file("trips"),
        file("stop_times"), file("calendar"),
        optFile("calendar_dates"), optFile("frequencies"), optFile("transfers")
      )

      parser.parse(builder, dir)

      (
        parser.builder, parser.agency, parser.stops, parser.routes,
        parser.trips, parser.stopTimes, parser.calendar, parser.calendarDates,
        parser.frequencies, parser.transfers
      ) should be === (
        builder, agency, stops, routes, trips, stopTimes, calendar,
        calendarDates, frequencies, transfers
      )
    }