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));
plot2.setBackgroundPainter(new ColorPainter(Color.RED));
assertEquals(plot1, plot2);
// backgroundImage
plot1.setBackgroundImage(getTestImage());
assertFalse(plot1.equals(plot2));