add(.3, .3);
add(.4, .4);
add(.5, .5);
CountingGraphics g = paint(new Rectangle(64, 116, 10, 10));
LineChecker c = new LineChecker();
c.allow(19, 180, 39, 160);
c.allow(39, 160, 59, 140);
c.require(59, 140, 79, 120);
c.check(g.getLines());
assertEquals(g.getLines().size() + 1, g.getPointCount());
}