Add an equals method override in TripImpl class

src/main/java/fr/univnantes/trainreservation/impl/TripImpl.java

@@ -147,4 +147,17 @@ public class TripImpl implements Trip {
     public void addArrivalDelay(Duration delay) {
         this.arrivalDelay = this.arrivalDelay.plus(delay);
     }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this)
+            return true;
+
+        if (!(obj instanceof Trip))
+            return false;
+
+        Trip tripObj = (Trip) obj;
+
+        return this.origin.equals(tripObj.getOrigin()) && this.destination.equals(tripObj.getDestination()) && this.train.equals(tripObj.getTrain()) && this.departureTime.equals(tripObj.getPlannedDepartureTime()) && this.arrivalTime.equals(tripObj.getPlannedArrivalTime()) && this.bookedTickets.equals(tripObj.getBookedTickets()) && this.cancelledTickets.equals(tripObj.getCancelledTickets()) && this.cancelled == tripObj.isCancelled() && this.departureDelay.equals(tripObj.getDepartureDelay()) && this.arrivalDelay.equals(tripObj.getArrivalDelay());
+    }
 }