text: test points
     0.286407 2.26952
     1.05632 2.75946
     1.94289 3.45938
     2.57281 9.782
     5.25584 0.426392
     9.38538 1.33629
     9.89865 9.31538
  test first set   (1.94289,0.426392),(9.38538,9.782)
  test operator = (1.94289,0.426392),(9.38538,9.782)
  test cctor      (1.94289,0.426392),(9.38538,9.782)
  test list insertion:
    number of successfully inserted points is 7
    LER is  (1.94289,0.426392),(9.38538,9.782)
  test default ctor    (0,0),(1,0.5)
  test after removal   (1.94289,0.426392),(9.38538,9.782)
  test successful insertion 1
  test after clear (0,0),(9.89865,10)
  test unsuccessful insertion 0
  test bounding box (0,0),(10,10)
  test left_bottom_right_top is 0 10,  0 0,  9.89865 9.31538,  10 10
  