test points
test first set   (0,0),(10,10)
test operator = (0,0),(10,10)
test cctor      (0,0),(10,10)
test list insertion:
  number of successfully inserted points is 0
  LER is  (0,0),(10,10)
test default ctor    (0,0),(1,0.5)
test after removal   (0,0),(10,10)
test successful insertion 0
test after clear (0,0),(10,10)
test unsuccessful insertion 0
test bounding box (0,0),(10,10)
test left_bottom_right_top is 0 0,  0 0,  10 10,  10 10
