public static Test suite() 
{
        return new TestSuite(AbstractCategoryItemRendererTests.class);
}

Returns the tests as a test suite.

 public  void testCloning1() 
{
        
        AbstractCategoryItemRenderer r1 = new BarRenderer();
        r1.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());
        AbstractCategoryItemRenderer r2 = null;
        try {
            r2 = (BarRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
        r1 = new BarRenderer();
        r1.setSeriesItemLabelGenerator(
            0, new StandardCategoryItemLabelGenerator()
        );
        r2 = null;
        try {
            r2 = (BarRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
        r1 = new BarRenderer();
        r1.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
        r2 = null;
        try {
            r2 = (BarRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
}

Confirm that cloning works.

 public  void testCloning2() 
{
        
        BarRenderer r1 = new BarRenderer();
        r1.setItemLabelGenerator(new IntervalCategoryItemLabelGenerator());
        BarRenderer r2 = null;
        try {
            r2 = (BarRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
        r1 = new BarRenderer();
        r1.setSeriesItemLabelGenerator(
            0, new IntervalCategoryItemLabelGenerator()
        );
        r2 = null;
        try {
            r2 = (BarRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
        r1 = new BarRenderer();
        r1.setBaseItemLabelGenerator(new IntervalCategoryItemLabelGenerator());
        r2 = null;
        try {
            r2 = (BarRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
}

Confirm that cloning works.