### Question:
KmlTrack extends KmlLineString { public HashMap<String, String> getProperties() { return mProperties; } KmlTrack(ArrayList<LatLng> coordinates, ArrayList<Double> altitudes, ArrayList<Long> timestamps, HashMap<String, String> properties); ArrayList<Long> getTimestamps(); HashMap<String, String> getProperties();  }### Answer:
@Test public void testProperties() { KmlTrack kmlTrack = createSimpleTrack(); assertNotNull(kmlTrack); assertNotNull(kmlTrack.getProperties()); assertEquals(kmlTrack.getProperties().size(), 1); assertEquals(kmlTrack.getProperties().get("key"), "value"); assertNull(kmlTrack.getProperties().get("missingKey")); }