}
@Test public void testShape0() {
assertTrue(group.getShapeAt(0) instanceof IGroup);
final IGroup gp = (IGroup) group.getShapeAt(0);
assertEquals(2, gp.size());
final ICircle circle = (ICircle) gp.getShapeAt(0);
final IGroup gp2 = (IGroup) gp.getShapeAt(1);
assertEquals(2, gp2.size());
final IText txt1 = (IText) gp2.getShapeAt(0);
final IText txt2 = (IText) gp2.getShapeAt(1);
assertEquals(Color.BLACK, circle.getLineColour());
assertTrue(circle.isFilled());
assertEquals(Color.WHITE, circle.getFillingCol());
assertEquals(60., circle.getWidth(),0.0001);