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jfreechart example source code file (NumberAxisTests.java)

This example jfreechart source code file (NumberAxisTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

awt, categoryplot, column, defaultcategorydataset, epsilon, epsilon, geometry, io, jfreechart, numberaxis, numberaxis, row, row, test, test, text, value, xyseriescollection

The jfreechart NumberAxisTests.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * --------------------
 * NumberAxisTests.java
 * --------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 26-Mar-2003 : Version 1 (DG);
 * 14-Aug-2003 : Added tests for equals() method (DG);
 * 05-Oct-2004 : Added tests to pick up a bug in the auto-range calculation for
 *               a domain axis on an XYPlot using an XYSeriesCollection (DG);
 * 07-Jan-2005 : Added test for hashCode() (DG);
 * 11-Jan-2006 : Fixed testAutoRange2() and testAutoRange3() following changes
 *               to BarRenderer (DG);
 * 20-Feb-2006 : Added rangeType field to equals() test (DG);
 *
 */

package org.jfree.chart.axis.junit;

import java.awt.geom.Rectangle2D;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.text.DecimalFormat;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.data.RangeType;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.RectangleEdge;

/**
 * Tests for the {@link NumberAxis} class.
 */
public class NumberAxisTests extends TestCase {

    /**
     * Returns the tests as a test suite.
     *
     * @return The test suite.
     */
    public static Test suite() {
        return new TestSuite(NumberAxisTests.class);
    }

    /**
     * Constructs a new set of tests.
     *
     * @param name  the name of the tests.
     */
    public NumberAxisTests(String name) {
        super(name);
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        NumberAxis a1 = new NumberAxis("Test");
        NumberAxis a2 = null;
        try {
            a2 = (NumberAxis) a1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(a1 != a2);
        assertTrue(a1.getClass() == a2.getClass());
        assertTrue(a1.equals(a2));
    }

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {

        NumberAxis a1 = new NumberAxis("Test");
        NumberAxis a2 = new NumberAxis("Test");
        assertTrue(a1.equals(a2));

        //private boolean autoRangeIncludesZero;
        a1.setAutoRangeIncludesZero(false);
        assertFalse(a1.equals(a2));
        a2.setAutoRangeIncludesZero(false);
        assertTrue(a1.equals(a2));

        //private boolean autoRangeStickyZero;
        a1.setAutoRangeStickyZero(false);
        assertFalse(a1.equals(a2));
        a2.setAutoRangeStickyZero(false);
        assertTrue(a1.equals(a2));

        //private NumberTickUnit tickUnit;
        a1.setTickUnit(new NumberTickUnit(25.0));
        assertFalse(a1.equals(a2));
        a2.setTickUnit(new NumberTickUnit(25.0));
        assertTrue(a1.equals(a2));

        //private NumberFormat numberFormatOverride;
        a1.setNumberFormatOverride(new DecimalFormat("0.00"));
        assertFalse(a1.equals(a2));
        a2.setNumberFormatOverride(new DecimalFormat("0.00"));
        assertTrue(a1.equals(a2));

        a1.setRangeType(RangeType.POSITIVE);
        assertFalse(a1.equals(a2));
        a2.setRangeType(RangeType.POSITIVE);
        assertTrue(a1.equals(a2));

    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashCode() {
        NumberAxis a1 = new NumberAxis("Test");
        NumberAxis a2 = new NumberAxis("Test");
        assertTrue(a1.equals(a2));
        int h1 = a1.hashCode();
        int h2 = a2.hashCode();
        assertEquals(h1, h2);
    }

    private static final double EPSILON = 0.0000001;

    /**
     * Test the translation of Java2D values to data values.
     */
    public void testTranslateJava2DToValue() {
        NumberAxis axis = new NumberAxis();
        axis.setRange(50.0, 100.0);
        Rectangle2D dataArea = new Rectangle2D.Double(10.0, 50.0, 400.0, 300.0);
        double y1 = axis.java2DToValue(75.0, dataArea, RectangleEdge.LEFT);
        assertEquals(y1, 95.8333333, EPSILON);
        double y2 = axis.java2DToValue(75.0, dataArea, RectangleEdge.RIGHT);
        assertEquals(y2, 95.8333333, EPSILON);
        double x1 = axis.java2DToValue(75.0, dataArea, RectangleEdge.TOP);
        assertEquals(x1, 58.125, EPSILON);
        double x2 = axis.java2DToValue(75.0, dataArea, RectangleEdge.BOTTOM);
        assertEquals(x2, 58.125, EPSILON);
        axis.setInverted(true);
        double y3 = axis.java2DToValue(75.0, dataArea, RectangleEdge.LEFT);
        assertEquals(y3, 54.1666667, EPSILON);
        double y4 = axis.java2DToValue(75.0, dataArea, RectangleEdge.RIGHT);
        assertEquals(y4, 54.1666667, EPSILON);
        double x3 = axis.java2DToValue(75.0, dataArea, RectangleEdge.TOP);
        assertEquals(x3, 91.875, EPSILON);
        double x4 = axis.java2DToValue(75.0, dataArea, RectangleEdge.BOTTOM);
        assertEquals(x4, 91.875, EPSILON);
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {

        NumberAxis a1 = new NumberAxis("Test Axis");
        NumberAxis a2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(a1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            a2 = (NumberAxis) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(a1, a2);

    }

    /**
     * A simple test for the auto-range calculation looking at a
     * NumberAxis used as the range axis for a CategoryPlot.
     */
    public void testAutoRange1() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.setValue(100.0, "Row 1", "Column 1");
        dataset.setValue(200.0, "Row 1", "Column 2");
        JFreeChart chart = ChartFactory.createBarChart(
            "Test",
            "Categories",
            "Value",
            dataset,
            PlotOrientation.VERTICAL,
            false,
            false,
            false
        );
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        NumberAxis axis = (NumberAxis) plot.getRangeAxis();
        assertEquals(axis.getLowerBound(), 0.0, EPSILON);
        assertEquals(axis.getUpperBound(), 210.0, EPSILON);
    }

    /**
     * A simple test for the auto-range calculation looking at a
     * NumberAxis used as the range axis for a CategoryPlot.  In this
     * case, the 'autoRangeIncludesZero' flag is set to false.
     */
    public void testAutoRange2() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.setValue(100.0, "Row 1", "Column 1");
        dataset.setValue(200.0, "Row 1", "Column 2");
        JFreeChart chart = ChartFactory.createLineChart("Test", "Categories",
                "Value", dataset, PlotOrientation.VERTICAL, false, false,
                false);
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        NumberAxis axis = (NumberAxis) plot.getRangeAxis();
        axis.setAutoRangeIncludesZero(false);
        assertEquals(axis.getLowerBound(), 95.0, EPSILON);
        assertEquals(axis.getUpperBound(), 205.0, EPSILON);
    }

    /**
     * A simple test for the auto-range calculation looking at a
     * NumberAxis used as the range axis for a CategoryPlot.  In this
     * case, the 'autoRangeIncludesZero' flag is set to false AND the
     * original dataset is replaced with a new dataset.
     */
    public void testAutoRange3() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.setValue(100.0, "Row 1", "Column 1");
        dataset.setValue(200.0, "Row 1", "Column 2");
        JFreeChart chart = ChartFactory.createLineChart("Test", "Categories",
                "Value", dataset, PlotOrientation.VERTICAL, false, false,
                false);
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        NumberAxis axis = (NumberAxis) plot.getRangeAxis();
        axis.setAutoRangeIncludesZero(false);
        assertEquals(axis.getLowerBound(), 95.0, EPSILON);
        assertEquals(axis.getUpperBound(), 205.0, EPSILON);

        // now replacing the dataset should update the axis range...
        DefaultCategoryDataset dataset2 = new DefaultCategoryDataset();
        dataset2.setValue(900.0, "Row 1", "Column 1");
        dataset2.setValue(1000.0, "Row 1", "Column 2");
        plot.setDataset(dataset2);
        assertEquals(axis.getLowerBound(), 895.0, EPSILON);
        assertEquals(axis.getUpperBound(), 1005.0, EPSILON);
    }

    /**
     * A check for the interaction between the 'autoRangeIncludesZero' flag
     * and the base setting in the BarRenderer.
     */
    public void testAutoRange4() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.setValue(100.0, "Row 1", "Column 1");
        dataset.setValue(200.0, "Row 1", "Column 2");
        JFreeChart chart = ChartFactory.createBarChart("Test", "Categories",
                "Value", dataset, PlotOrientation.VERTICAL, false, false,
                false);
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        NumberAxis axis = (NumberAxis) plot.getRangeAxis();
        axis.setAutoRangeIncludesZero(false);
        BarRenderer br = (BarRenderer) plot.getRenderer();
        br.setIncludeBaseInRange(false);
        assertEquals(95.0, axis.getLowerBound(), EPSILON);
        assertEquals(205.0, axis.getUpperBound(), EPSILON);

        br.setIncludeBaseInRange(true);
        assertEquals(0.0, axis.getLowerBound(), EPSILON);
        assertEquals(210.0, axis.getUpperBound(), EPSILON);

        axis.setAutoRangeIncludesZero(true);
        assertEquals(0.0, axis.getLowerBound(), EPSILON);
        assertEquals(210.0, axis.getUpperBound(), EPSILON);

        br.setIncludeBaseInRange(true);
        assertEquals(0.0, axis.getLowerBound(), EPSILON);
        assertEquals(210.0, axis.getUpperBound(), EPSILON);

        // now replacing the dataset should update the axis range...
        DefaultCategoryDataset dataset2 = new DefaultCategoryDataset();
        dataset2.setValue(900.0, "Row 1", "Column 1");
        dataset2.setValue(1000.0, "Row 1", "Column 2");
        plot.setDataset(dataset2);
        assertEquals(0.0, axis.getLowerBound(), EPSILON);
        assertEquals(1050.0, axis.getUpperBound(), EPSILON);

        br.setIncludeBaseInRange(false);
        assertEquals(0.0, axis.getLowerBound(), EPSILON);
        assertEquals(1050.0, axis.getUpperBound(), EPSILON);

        axis.setAutoRangeIncludesZero(false);
        assertEquals(895.0, axis.getLowerBound(), EPSILON);
        assertEquals(1005.0, axis.getUpperBound(), EPSILON);
    }

    /**
     * Checks that the auto-range for the domain axis on an XYPlot is
     * working as expected.
     */
    public void testXYAutoRange1() {
        XYSeries series = new XYSeries("Series 1");
        series.add(1.0, 1.0);
        series.add(2.0, 2.0);
        series.add(3.0, 3.0);
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(series);
        JFreeChart chart = ChartFactory.createScatterPlot(
            "Test",
            "X",
            "Y",
            dataset,
            PlotOrientation.VERTICAL,
            false,
            false,
            false
        );
        XYPlot plot = (XYPlot) chart.getPlot();
        NumberAxis axis = (NumberAxis) plot.getDomainAxis();
        axis.setAutoRangeIncludesZero(false);
        assertEquals(0.9, axis.getLowerBound(), EPSILON);
        assertEquals(3.1, axis.getUpperBound(), EPSILON);
    }

    /**
     * Checks that the auto-range for the range axis on an XYPlot is
     * working as expected.
     */
    public void testXYAutoRange2() {
        XYSeries series = new XYSeries("Series 1");
        series.add(1.0, 1.0);
        series.add(2.0, 2.0);
        series.add(3.0, 3.0);
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(series);
        JFreeChart chart = ChartFactory.createScatterPlot(
            "Test",
            "X",
            "Y",
            dataset,
            PlotOrientation.VERTICAL,
            false,
            false,
            false
        );
        XYPlot plot = (XYPlot) chart.getPlot();
        NumberAxis axis = (NumberAxis) plot.getRangeAxis();
        axis.setAutoRangeIncludesZero(false);
        assertEquals(0.9, axis.getLowerBound(), EPSILON);
        assertEquals(3.1, axis.getUpperBound(), EPSILON);
    }

//    /**
//     * Some checks for the setRangeType() method.
//     */
//    public void testSetRangeType() {
//
//        NumberAxis axis = new NumberAxis("X");
//        axis.setRangeType(RangeType.POSITIVE);
//        assertEquals(RangeType.POSITIVE, axis.getRangeType());
//
//        // test a change to RangeType.POSITIVE
//        axis.setRangeType(RangeType.FULL);
//        axis.setRange(-5.0, 5.0);
//        axis.setRangeType(RangeType.POSITIVE);
//        assertEquals(new Range(0.0, 5.0), axis.getRange());
//
//        axis.setRangeType(RangeType.FULL);
//        axis.setRange(-10.0, -5.0);
//        axis.setRangeType(RangeType.POSITIVE);
//        assertEquals(new Range(0.0, axis.getAutoRangeMinimumSize()),
//                axis.getRange());
//
//        // test a change to RangeType.NEGATIVE
//        axis.setRangeType(RangeType.FULL);
//        axis.setRange(-5.0, 5.0);
//        axis.setRangeType(RangeType.NEGATIVE);
//        assertEquals(new Range(-5.0, 0.0), axis.getRange());
//
//        axis.setRangeType(RangeType.FULL);
//        axis.setRange(5.0, 10.0);
//        axis.setRangeType(RangeType.NEGATIVE);
//        assertEquals(new Range(-axis.getAutoRangeMinimumSize(), 0.0),
//                axis.getRange());
//
//        // try null
//        boolean pass = false;
//        try {
//            axis.setRangeType(null);
//        }
//        catch (IllegalArgumentException e) {
//            pass = true;
//        }
//        assertTrue(pass);
//    }

    /**
     * Some checks for the setLowerBound() method.
     */
    public void testSetLowerBound() {
        NumberAxis axis = new NumberAxis("X");
        axis.setRange(0.0, 10.0);
        axis.setLowerBound(5.0);
        assertEquals(5.0, axis.getLowerBound(), EPSILON);
        axis.setLowerBound(10.0);
        assertEquals(10.0, axis.getLowerBound(), EPSILON);
        assertEquals(11.0, axis.getUpperBound(), EPSILON);

        //axis.setRangeType(RangeType.POSITIVE);
        //axis.setLowerBound(-5.0);
        //assertEquals(0.0, axis.getLowerBound(), EPSILON);
    }

}

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