plot1.setInsets(new RectangleInsets(1.0, 2.0, 3.0, 4.0));
assertFalse(plot1.equals(plot2));
plot2.setInsets(new RectangleInsets(1.0, 2.0, 3.0, 4.0));
assertEquals(plot1, plot2);
plot1.setBorderPainter(new BorderPainter(Color.RED, new BasicStroke(1.0f)));
assertFalse(plot1.equals(plot2));
plot2.setBorderPainter(new BorderPainter(Color.RED, new BasicStroke(1.0f)));
assertEquals(plot1, plot2);
// backgroundPainter
plot1.setBackgroundPainter(new ColorPainter(Color.RED));
assertFalse(plot1.equals(plot2));