assertTrue(handler.getEditBlackboard().getSelection().contains(Point.valueOf(10,10)));
assertTrue(handler.getEditBlackboard().getSelection().contains(Point.valueOf(20,15)));
//test no change when SHIFT-click and CTRL-click on nothing
event= new MapMouseEvent(null, 300, 300, shift, none, button1);
handler.handleEvent( event, EventType.RELEASED);
assertEquals(2, handler.getEditBlackboard().getSelection().size());
assertTrue(handler.getEditBlackboard().getSelection().contains(Point.valueOf(10,10)));
assertTrue(handler.getEditBlackboard().getSelection().contains(Point.valueOf(20,15)));
event= new MapMouseEvent(null, 300, 300, ctrl, none, button1);