Feature/dt 462 add stop times validator

src/main/java/com/conveyal/gtfs/error/NewGTFSErrorType.java

@@ -43,6 +43,7 @@ public enum NewGTFSErrorType {
     NUMBER_TOO_SMALL(Priority.MEDIUM, "Number was below the allowed range."),
     OVERLAPPING_TRIP(Priority.MEDIUM, "Blocks?"),
     REFERENTIAL_INTEGRITY(Priority.HIGH, "This line references an ID that does not exist in the target table."),
+    REPEATED_ARRIVAL_TIME(Priority.MEDIUM, "Arrival time at current stop is equal to the previous stop."),
     REQUIRED_TABLE_EMPTY(Priority.MEDIUM, "This table is required by the GTFS specification but is empty."),
     ROUTE_DESCRIPTION_SAME_AS_NAME(Priority.LOW, "The description of a route is identical to its name, so does not add any information."),
     ROUTE_LONG_NAME_CONTAINS_SHORT_NAME(Priority.LOW, "The long name of a route should complement the short name, not include it."),

src/main/java/com/conveyal/gtfs/validator/SpeedTripValidator.java

@@ -48,8 +48,12 @@ public void validateTrip(Trip trip, Route route, List<StopTime> stopTimes, List<
         double distanceMeters = 0;
         for (int i = beginIndex + 1; i < stopTimes.size(); i++) {
             StopTime currStopTime = stopTimes.get(i);
+            // Additional check: Ensure arrival_time is not the same for consecutive stops
+            if (currStopTime.arrival_time == prevStopTime.arrival_time) {
+                registerError(currStopTime, NewGTFSErrorType.REPEATED_ARRIVAL_TIME);
+            }
             if (currStopTime.pickup_type == 1 && currStopTime.drop_off_type == 1 && currStopTime.timepoint == 0) {
-                // stop_time allows neither pickup or drop off and is not a timepoint, so it serves no purpose.
+                // stop_time allows neither pickup nor drop off and is not a timepoint, so it serves no purpose.
                 registerError(currStopTime, NewGTFSErrorType.STOP_TIME_UNUSED);
             }
             Stop currStop = stops.get(i);

src/test/java/com/conveyal/gtfs/validator/SpeedTripValidatorTest.java

@@ -12,8 +12,7 @@
 import static com.conveyal.gtfs.GTFS.load;
 import static com.conveyal.gtfs.GTFS.validate;
 import static com.conveyal.gtfs.TestUtils.assertThatSqlCountQueryYieldsExpectedCount;
-import static com.conveyal.gtfs.error.NewGTFSErrorType.TRAVEL_TOO_FAST;
-import static com.conveyal.gtfs.error.NewGTFSErrorType.TRAVEL_TOO_SLOW;
+import static com.conveyal.gtfs.error.NewGTFSErrorType.*;
 
 /**
  * Distances recorded against each unit test have been produced using the lat/lon values from
@@ -112,6 +111,11 @@ public void tripTravelingTooSlowWithMissingStopTimesHasError() {
         checkFeedHasError(TRAVEL_TOO_SLOW, "6", 3);
     }
 
+    @Test
+    public void tripHasDuplicateArrivalTimesHasError() {
+        checkFeedHasError(REPEATED_ARRIVAL_TIME,"7",2);
+    }
+
     /**
      * Check that the test feed has exactly one error for the given type, entityId, and entitySequence.
      */

src/test/resources/real-world-gtfs-feeds/VTA-gtfs-multiple-trips/stop_times.txt

@@ -23,4 +23,6 @@ trip_id,arrival_time,departure_time,stop_id,stop_sequence,stop_headsign,pickup_t
 5,23:59:00,23:59:00,1562,3,,0,0,9.39290047,0
 6,00:00:00,00:00:00,4957,1,,0,0,,1
 6,,,1558,2,,0,0,8.34879971,0
-6,23:59:00,23:59:00,1562,3,,0,0,9.39290047,0
+6,23:59:00,23:59:00,1562,3,,0,0,9.39290047,0
+7,01:00:00,01:00:00,4957,1,,0,0,,0
+7,01:00:00,01:00:00,1558,2,,0,0,8.34879971,0

src/test/resources/real-world-gtfs-feeds/VTA-gtfs-multiple-trips/trips.txt

@@ -5,3 +5,4 @@ route_id,service_id,trip_id,trip_headsign,trip_short_name,direction_id,block_id,
 23,1,4,PALO ALTO TRANSIT CTR 4,,1,2145,101395,0,0
 23,1,5,PALO ALTO TRANSIT CTR 5,,1,2145,101395,0,0
 23,1,6,PALO ALTO TRANSIT CTR 6,,1,2145,101395,0,0
+23,1,7,PALO ALTO TRANSIT CTR 7,,1,2145,101395,0,0