public void testPaintTrailingNaNStepXY() throws InterruptedException, InvocationTargetException {
line.setLineMode(LineMode.STEP_XY);
add(.1, .1);
add(.9, .9);
add(.95, Double.NaN);
CountingGraphics g = paint();
assertEquals(3, g.getPointCount());
LineChecker c = new LineChecker();
c.require(19, 180, 179, 180);
c.require(179, 180, 179, 20);
c.check(g.getLines());
}