/**
 * Creates a filled stepped XY plot with default settings.
 *
 * @param title  the chart title (<code>null</code> permitted).
 * @param xAxisLabel  a label for the X-axis (<code>null</code> permitted).
 * @param yAxisLabel  a label for the Y-axis (<code>null</code> permitted).
 * @param dataset  the dataset for the chart (<code>null</code> permitted).
 * @param legend  a flag specifying whether or not a legend is required.
 *
 * @return A chart.
 */
public static JFreeChart createXYStepAreaChart(String title, 
        String xAxisLabel, String yAxisLabel, XYDataset dataset,
        boolean legend) {

    NumberAxis xAxis = new NumberAxis(xAxisLabel);
    xAxis.setAutoRangeIncludesZero(false);
    NumberAxis yAxis = new NumberAxis(yAxisLabel);
    XYItemRenderer renderer = new XYStepAreaRenderer(
            XYStepAreaRenderer.AREA_AND_SHAPES);
    renderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
    XYPlot plot = new XYPlot(dataset, xAxis, yAxis, null);
    plot.setRenderer(renderer);
    plot.setDomainCrosshairVisible(false);
    plot.setRangeCrosshairVisible(false);
    JFreeChart chart = new JFreeChart(title, JFreeChart.DEFAULT_TITLE_FONT,
            plot, legend);
    currentTheme.apply(chart);
    return chart;
}
 

/**
 * Check that the equals() method distinguishes all fields.
 */
public void testEquals() {
    XYStepAreaRenderer r1 = new XYStepAreaRenderer();
    XYStepAreaRenderer r2 = new XYStepAreaRenderer();
    assertEquals(r1, r2);

    r1.setOutline(true);
    assertFalse(r1.equals(r2));
    r2.setOutline(true);
    assertTrue(r1.equals(r2));

    r1.setShapesVisible(true);
    assertFalse(r1.equals(r2));
    r2.setShapesVisible(true);
    assertTrue(r1.equals(r2));

    r1.setShapesFilled(true);
    assertFalse(r1.equals(r2));
    r2.setShapesFilled(true);
    assertTrue(r1.equals(r2));

    r1.setPlotArea(false);
    assertFalse(r1.equals(r2));
    r2.setPlotArea(false);
    assertTrue(r1.equals(r2));

    r1.setRangeBase(-1.0);
    assertFalse(r1.equals(r2));
    r2.setRangeBase(-1.0);
    assertTrue(r1.equals(r2));
}
 

/**
 * Two objects that are equal are required to return the same hashCode.
 */
public void testHashcode() {
    XYStepAreaRenderer r1 = new XYStepAreaRenderer();
    XYStepAreaRenderer r2 = new XYStepAreaRenderer();
    assertTrue(r1.equals(r2));
    int h1 = r1.hashCode();
    int h2 = r2.hashCode();
    assertEquals(h1, h2);
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that
 * no exceptions are thrown (particularly by code in the renderer).
 */
public void testDrawWithNullInfo() {
    boolean success = false;
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();

        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);

        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset,
                new NumberAxis("X"), new NumberAxis("Y"),
                new XYStepAreaRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                null);
        success = true;
    }
    catch (NullPointerException e) {
        e.printStackTrace();
        success = false;
    }
    assertTrue(success);
}
 

/**
 * Check that the equals() method distinguishes all fields.
 */
public void testEquals() {
    XYStepAreaRenderer r1 = new XYStepAreaRenderer();
    XYStepAreaRenderer r2 = new XYStepAreaRenderer();
    assertEquals(r1, r2);
    
    r1.setOutline(true);
    assertFalse(r1.equals(r2));
    r2.setOutline(true);
    assertTrue(r1.equals(r2));
    
    r1.setShapesVisible(true);
    assertFalse(r1.equals(r2));
    r2.setShapesVisible(true);
    assertTrue(r1.equals(r2));
    
    r1.setShapesFilled(true);
    assertFalse(r1.equals(r2));
    r2.setShapesFilled(true);
    assertTrue(r1.equals(r2));
    
    r1.setPlotArea(false);
    assertFalse(r1.equals(r2));
    r2.setPlotArea(false);
    assertTrue(r1.equals(r2));
    
    r1.setRangeBase(-1.0);
    assertFalse(r1.equals(r2));
    r2.setRangeBase(-1.0);
    assertTrue(r1.equals(r2));
}
 

/**
 * Two objects that are equal are required to return the same hashCode. 
 */
public void testHashcode() {
    XYStepAreaRenderer r1 = new XYStepAreaRenderer();
    XYStepAreaRenderer r2 = new XYStepAreaRenderer();
    assertTrue(r1.equals(r2));
    int h1 = r1.hashCode();
    int h2 = r2.hashCode();
    assertEquals(h1, h2);
}
 

/**
 * Draws the chart with a <code>null</code> info object to make sure that 
 * no exceptions are thrown (particularly by code in the renderer).
 */
public void testDrawWithNullInfo() {
    boolean success = false;
    try {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();
    
        XYSeries s1 = new XYSeries("Series 1", true, false);
        s1.add(5.0, 5.0);
        s1.add(10.0, 15.5);
        s1.add(15.0, 9.5);
        s1.add(20.0, 7.5);
        dataset.addSeries(s1);
    
        XYSeries s2 = new XYSeries("Series 2", true, false);
        s2.add(5.0, 5.0);
        s2.add(10.0, 15.5);
        s2.add(15.0, 9.5);
        s2.add(20.0, 3.5);
        dataset.addSeries(s2);
        XYPlot plot = new XYPlot(dataset, 
                new NumberAxis("X"), new NumberAxis("Y"), 
                new XYStepAreaRenderer());
        JFreeChart chart = new JFreeChart(plot);
        /* BufferedImage image = */ chart.createBufferedImage(300, 200, 
                null);
        success = true;
    }
    catch (NullPointerException e) {
        e.printStackTrace();
        success = false;
    }
    assertTrue(success);
}
 

/**
 * Verify that this class implements {@link PublicCloneable}.
 */
public void testPublicCloneable() {
    XYStepAreaRenderer r1 = new XYStepAreaRenderer();
    assertTrue(r1 instanceof PublicCloneable);
}