public void testTransfers() throws Exception {
TransferTable transferTable = graph.getTransferTable();
// create dummy routes and trips
Route fromRoute = new Route();
fromRoute.setId(new AgencyAndId("agency", "1"));
Trip fromTrip = new Trip();
fromTrip.setId(new AgencyAndId("agency", "1.1"));
fromTrip.setRoute(fromRoute);
Route toRoute = new Route();
toRoute.setId(new AgencyAndId("agency", "2"));
Trip toTrip = new Trip();
toTrip.setId(new AgencyAndId("agency", "2.1"));
toTrip.setRoute(toRoute);
Trip toTrip2 = new Trip();
toTrip2.setId(new AgencyAndId("agency", "2.2"));