### Question:
BusItineraryHalt extends AbstractBusPrimitive<BusItinerary> { @Pure public boolean isStartingBusHalt() { final BusItinerary itinerary = getContainer(); if (itinerary != null && itinerary.isValidPrimitive()) { try { return itinerary.getBusHaltAt(0) == this; } catch (IndexOutOfBoundsException exception) { } } return false; } BusItineraryHalt(BusItinerary itinerary, String name, BusItineraryHaltType type);   BusItineraryHalt(UUID id, BusItinerary itinerary, String name, BusItineraryHaltType type);   BusItineraryHalt(BusItinerary itinerary, String name, BusItineraryHaltType type, AttributeCollection attributeProvider);   BusItineraryHalt(UUID id, BusItinerary itinerary, String name, BusItineraryHaltType type,
			AttributeCollection attributeProvider); @Override @Pure void toJson(JsonBuffer buffer); @Pure static String getFirstFreeBushaltName(BusItinerary busItinerary); @Override void rebuild(boolean fireEvents); @Pure int getInvalidListIndex(); @Override @Pure BusNetwork getBusNetwork(); @Pure BusStop getBusStop(); boolean setBusStop(BusStop busStop); @Override void setName(String name); @Pure Point2d getPosition2D(); @Pure Point1d getPosition1D(); @Pure RoadSegment getRoadSegment(); @Pure int getRoadSegmentIndex(); @Pure double getPositionOnSegment(); @Pure Direction1D getRoadSegmentDirection(); @Pure BusItineraryHaltType getType(); void setType(BusItineraryHaltType type); @Pure boolean isTerminus(); @Override @Pure int indexInParent(); @Pure boolean isStartingBusHalt(); @Pure boolean isEndingBusHalt(); @Pure boolean insideBusHub(); @Pure Iterable<BusHub> busHubs(); @Pure Iterator<BusHub> busHubIterator(); @Override Shape2d<?> getShape(); @Override @Pure final GeoLocation getGeoLocation(); @Pure GeoLocationPoint getGeoPosition(); @Pure double distanceToBusStop(); @Pure double distance(double x, double y); @Pure double distance(Point2D<?, ?> point); @Pure double distance(BusItineraryHalt halt); @Pure double distance(BusStop busStop); @Pure double distance(GeoLocationPoint point); static final double DISTANCE_BETWEEN_HALT_AND_ROAD_BORDER; }### Answer:
@Test public void testIsStartingBusHalt() { this.halt = this.itinerary.addBusHalt("HALT1", BusItineraryHaltType.STOP_ON_DEMAND); assertFalse(this.halt.isStartingBusHalt()); this.itinerary.addRoadSegment(this.segment1); assertFalse(this.halt.isStartingBusHalt()); this.itinerary.addRoadSegment(this.segment2); assertFalse(this.halt.isStartingBusHalt()); this.stop.setPosition(new GeoLocationPoint(10., 10.)); assertFalse(this.halt.isStartingBusHalt()); this.halt.setBusStop(this.stop); assertFalse(this.halt.isStartingBusHalt()); this.halt.setRoadSegmentIndex(0); this.halt.checkPrimitiveValidity(); assertFalse(this.halt.isStartingBusHalt()); this.halt.setPositionOnSegment(1f); this.halt.checkPrimitiveValidity(); assertFalse(this.halt.isStartingBusHalt()); BusStop tmpStop = new BusStopStub(this.busNetwork, "STOP_TMP"); tmpStop.setPosition(new GeoLocationPoint(-10., -10.)); BusItineraryHalt tmpHalt = this.itinerary.addBusHalt("HALT_TMP", BusItineraryHaltType.STOP_ON_DEMAND); tmpHalt.setBusStop(tmpStop); tmpHalt.setRoadSegmentIndex(1); tmpHalt.setPositionOnSegment(1f); tmpHalt.checkPrimitiveValidity(); assertTrue(this.halt.isStartingBusHalt()); }