--- a/trafficintelligence/tests/moving.txt	Thu Feb 17 10:55:11 2022 -0500
+++ b/trafficintelligence/tests/moving.txt	Thu Mar 24 16:07:51 2022 -0400
@@ -137,6 +137,9 @@
 >>> t3 = Trajectory.fromPointList([(92.2, 102.9), (56.7, 69.6), (56.7, 69.6)])
 >>> t1 == t3
 False
+>>> t1.append(t2)
+>>> t1.length()
+4
 
 >>> left = Trajectory.fromPointList([(92.291666666666686, 102.99239033124439), (56.774193548387103, 69.688898836168306)])
 >>> middle = Trajectory.fromPointList([(87.211021505376351, 93.390778871978512), (59.032258064516128, 67.540286481647257)])
@@ -151,8 +154,8 @@
 >>> Trajectory().length()
 0
 >>> t1 = Trajectory([[0.5,1.5,2.5],[0.5,3.5,6.5]])
->>> t1.length() == 3.
-True
+>>> t1.length()
+3
 >>> t1[1]
 (1.500000,3.500000)
 
@@ -298,9 +301,15 @@
 >>> o2.features = [o2]
 >>> o3 = MovingObject.generate(3, Point(2., 2.), Point(1., 1.), TimeInterval(2,12))
 >>> o3.features = [o3]
->>> o13 = MovingObject.concatenate(o1, o3, 4)
->>> o13.getNum()
-4
+>>> o4 = MovingObject.generate(4, Point(4., 4.), Point(1., 1.), TimeInterval(11,20))
+>>> o4.features = [o4]
+>>> o5 = MovingObject.generate(5, Point(5., 5.), Point(1., 1.), TimeInterval(12,22))
+>>> o5.features = [o5]
+
+>>> objNum = 14
+>>> o13, f13 = MovingObject.concatenate(o1, o3, objNum)
+>>> o13.getNum() == objNum
+True
 >>> o13.getTimeInterval() == TimeInterval(0,12)
 True
 >>> t=5
@@ -309,7 +318,7 @@
 >>> len(o13.getFeatures())
 2
 
->>> o12 = MovingObject.concatenate(o1, o2, 5, minFeatureLength = 6)
+>>> o12, f12 = MovingObject.concatenate(o1, o2, 15, 15)
 >>> o12.getTimeInterval() == TimeInterval(o1.getFirstInstant(), o2.getLastInstant())
 True
 >>> v = o12.getVelocityAtInstant(12)
@@ -319,9 +328,41 @@
 True
 >>> len(o12.getFeatures())
 3
->>> f = o12.getFeatures()[-1]
->>> f.length()
-6.0
+>>> f12.length()
+5.0
+>>> f12.getPositions().length()
+5
+>>> f12.getVelocities().length()
+5
+
+>>> o14, f14 = MovingObject.concatenate(o1, o4, 16)
+>>> len(o14.getFeatures())
+2
+>>> o14.getPositionAtInstant(10) == o1.getPositionAtInstant(10)
+True
+>>> o14.getPositionAtInstant(11) == o4.getPositionAtInstant(11)
+True
+
+>>> o15, f15 = MovingObject.concatenate(o1, o5, 17, 17)
+>>> len(o15.getFeatures())
+3
+>>> f15.length()
+3.0
+>>> o15.getFeatures()[-1] == f15
+True
+>>> o1.getPositionAtInstant(10) == o15.getPositionAtInstant(10)
+True
+>>> f15.getPositionAtInstant(11) == o15.getPositionAtInstant(11)
+True
+>>> o5.getPositionAtInstant(12) == o15.getPositionAtInstant(12)
+True
+>>> o15.updatePositions()
+>>> o1.getPositionAtInstant(10) == o15.getPositionAtInstant(10)
+True
+>>> f15.getPositionAtInstant(11) == o15.getPositionAtInstant(11)
+True
+>>> o5.getPositionAtInstant(12) == o15.getPositionAtInstant(12)
+True
 
 >>> o1 = MovingObject.generate(1, Point(0., 2.), Point(0., 1.), TimeInterval(0,2))
 >>> o1.classifyUserTypeSpeedMotorized(0.5, np.median)