@Test
  public void testUpdate() {
    TripUpdate tripUpdate;
    TripUpdate.Builder tripUpdateBuilder;
    TripDescriptor.Builder tripDescriptorBuilder;
    StopTimeUpdate.Builder stopTimeUpdateBuilder;
    StopTimeEvent.Builder stopTimeEventBuilder;

    int trip_1_1_index = timetable.getTripIndex(new AgencyAndId("agency", "1.1"));

    Vertex stop_a = graph.getVertex("agency_A");
    Vertex stop_c = graph.getVertex("agency_C");
    RoutingRequest options = new RoutingRequest();

    ShortestPathTree spt;
    GraphPath path;

    // non-existing trip
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("b");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.CANCELED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    tripUpdate = tripUpdateBuilder.build();
    assertFalse(timetable.update(tripUpdate, "a", timeZone, serviceDate));

    // update trip with bad data
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
    stopTimeUpdateBuilder.setStopSequence(0);
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SKIPPED);
    tripUpdate = tripUpdateBuilder.build();
    assertFalse(timetable.update(tripUpdate, "agency", timeZone, serviceDate));

    // update trip with non-increasing data
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
    stopTimeUpdateBuilder.setStopSequence(2);
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
    stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
    stopTimeEventBuilder.setTime(
        TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 10, 1));
    stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
    stopTimeEventBuilder.setTime(
        TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 10, 0));
    tripUpdate = tripUpdateBuilder.build();
    assertFalse(timetable.update(tripUpdate, "agency", timeZone, serviceDate));

    // ---
    long startTime = TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 0, 0);
    long endTime;
    options.dateTime = startTime;

    // ---
    options.setRoutingContext(graph, stop_a, stop_c);
    spt = aStar.getShortestPathTree(options);
    path = spt.getPath(stop_c, false);
    assertNotNull(path);
    endTime = startTime + 20 * 60;
    assertEquals(endTime, path.getEndTime());

    // update trip
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
    stopTimeUpdateBuilder.setStopSequence(1);
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
    stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
    stopTimeEventBuilder.setTime(
        TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 2, 0));
    stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
    stopTimeEventBuilder.setTime(
        TestUtils.dateInSeconds("America/New_York", 2009, AUGUST, 7, 0, 2, 0));
    tripUpdate = tripUpdateBuilder.build();
    assertEquals(20 * 60, timetable.getTripTimes(trip_1_1_index).getArrivalTime(2));
    assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
    assertEquals(20 * 60 + 120, timetable.getTripTimes(trip_1_1_index).getArrivalTime(2));

    // ---
    options.setRoutingContext(graph, stop_a, stop_c);
    spt = aStar.getShortestPathTree(options);
    path = spt.getPath(stop_c, false);
    assertNotNull(path);
    endTime = startTime + 20 * 60 + 120;
    assertEquals(endTime, path.getEndTime());

    // cancel trip
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.CANCELED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    tripUpdate = tripUpdateBuilder.build();
    assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));

    TripTimes tripTimes = timetable.getTripTimes(trip_1_1_index);
    for (int i = 0; i < tripTimes.getNumStops(); i++) {
      assertEquals(TripTimes.UNAVAILABLE, tripTimes.getDepartureTime(i));
      assertEquals(TripTimes.UNAVAILABLE, tripTimes.getArrivalTime(i));
    }

    // ---
    options.setRoutingContext(graph, stop_a, stop_c);
    spt = aStar.getShortestPathTree(options);
    path = spt.getPath(stop_c, false);
    assertNotNull(path);
    endTime = startTime + 40 * 60;
    assertEquals(endTime, path.getEndTime());

    // update trip arrival time incorrectly
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
    stopTimeUpdateBuilder.setStopSequence(1);
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
    stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
    stopTimeEventBuilder.setDelay(0);
    tripUpdate = tripUpdateBuilder.build();
    assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));

    // update trip arrival time only
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
    stopTimeUpdateBuilder.setStopSequence(2);
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
    stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
    stopTimeEventBuilder.setDelay(1);
    tripUpdate = tripUpdateBuilder.build();
    assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));

    // update trip departure time only
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
    stopTimeUpdateBuilder.setStopSequence(2);
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
    stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
    stopTimeEventBuilder.setDelay(-1);
    tripUpdate = tripUpdateBuilder.build();
    assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));

    // update trip using stop id
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
    stopTimeUpdateBuilder.setStopId("B");
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
    stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
    stopTimeEventBuilder.setDelay(-1);
    tripUpdate = tripUpdateBuilder.build();
    assertTrue(timetable.update(tripUpdate, "agency", timeZone, serviceDate));

    // update trip arrival time at first stop and make departure time incoherent at second stop
    tripDescriptorBuilder = TripDescriptor.newBuilder();
    tripDescriptorBuilder.setTripId("1.1");
    tripDescriptorBuilder.setScheduleRelationship(TripDescriptor.ScheduleRelationship.SCHEDULED);
    tripUpdateBuilder = TripUpdate.newBuilder();
    tripUpdateBuilder.setTrip(tripDescriptorBuilder);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(0);
    stopTimeUpdateBuilder.setStopSequence(1);
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
    stopTimeEventBuilder = stopTimeUpdateBuilder.getArrivalBuilder();
    stopTimeEventBuilder.setDelay(0);
    stopTimeUpdateBuilder = tripUpdateBuilder.addStopTimeUpdateBuilder(1);
    stopTimeUpdateBuilder.setStopSequence(2);
    stopTimeUpdateBuilder.setScheduleRelationship(StopTimeUpdate.ScheduleRelationship.SCHEDULED);
    stopTimeEventBuilder = stopTimeUpdateBuilder.getDepartureBuilder();
    stopTimeEventBuilder.setDelay(-1);
    tripUpdate = tripUpdateBuilder.build();
    assertFalse(timetable.update(tripUpdate, "agency", timeZone, serviceDate));
  }