jfreechart example source code file (CategoryAxisTests.java)

This example jfreechart source code file (CategoryAxisTests.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, bytearrayoutputstream, c1, c1, categoryaxis, categoryaxis, categoryaxistests, check, clonenotsupportedexception, dialog, font, font, io, test, test, xyz

The jfreechart CategoryAxisTests.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.]
 *
 * ----------------------
 * CategoryAxisTests.java
 * ----------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 18-Mar-2003 : Version 1 (DG);
 * 13-Aug-2003 : Added clone() test (DG);
 * 07-Jan-2005 : Added hashCode() test (DG);
 *
 */

package org.jfree.chart.axis.junit;

import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
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 junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;

/**
 * Tests for the {@link CategoryAxis} class.
 */
public class CategoryAxisTests extends TestCase {

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

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

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

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

        // lowerMargin
        a1.setLowerMargin(0.15);
        assertFalse(a1.equals(a2));
        a2.setLowerMargin(0.15);
        assertTrue(a1.equals(a2));

        // upperMargin
        a1.setUpperMargin(0.15);
        assertFalse(a1.equals(a2));
        a2.setUpperMargin(0.15);
        assertTrue(a1.equals(a2));

        // categoryMargin
        a1.setCategoryMargin(0.15);
        assertFalse(a1.equals(a2));
        a2.setCategoryMargin(0.15);
        assertTrue(a1.equals(a2));

        // maxCategoryLabelWidthRatio
        a1.setMaximumCategoryLabelWidthRatio(0.98f);
        assertFalse(a1.equals(a2));
        a2.setMaximumCategoryLabelWidthRatio(0.98f);
        assertTrue(a1.equals(a2));

        // categoryLabelPositionOffset
        a1.setCategoryLabelPositionOffset(11);
        assertFalse(a1.equals(a2));
        a2.setCategoryLabelPositionOffset(11);
        assertTrue(a1.equals(a2));

        // categoryLabelPositions
        a1.setCategoryLabelPositions(CategoryLabelPositions.DOWN_45);
        assertFalse(a1.equals(a2));
        a2.setCategoryLabelPositions(CategoryLabelPositions.DOWN_45);
        assertTrue(a1.equals(a2));

        // categoryLabelToolTips
        a1.addCategoryLabelToolTip("Test", "Check");
        assertFalse(a1.equals(a2));
        a2.addCategoryLabelToolTip("Test", "Check");
        assertTrue(a1.equals(a2));

        // tickLabelFont
        a1.setTickLabelFont("C1", new Font("Dialog", Font.PLAIN, 21));
        assertFalse(a1.equals(a2));
        a2.setTickLabelFont("C1", new Font("Dialog", Font.PLAIN, 21));
        assertTrue(a1.equals(a2));

        // tickLabelPaint
        a1.setTickLabelPaint("C1", Color.red);
        assertFalse(a1.equals(a2));
        a2.setTickLabelPaint("C1", Color.red);
        assertTrue(a1.equals(a2));

        // tickLabelPaint2
        a1.setTickLabelPaint("C1", new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.yellow));
        assertFalse(a1.equals(a2));
        a2.setTickLabelPaint("C1", new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.yellow));
        assertTrue(a1.equals(a2));

    }

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

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        CategoryAxis a1 = new CategoryAxis("Test");
        CategoryAxis a2 = null;
        try {
            a2 = (CategoryAxis) a1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(a1 != a2);
        assertTrue(a1.getClass() == a2.getClass());
        assertTrue(a1.equals(a2));
    }

    /**
     * Confirm that cloning works.  This test customises the font and paint
     * per category label.
     */
    public void testCloning2() {
        CategoryAxis a1 = new CategoryAxis("Test");
        a1.setTickLabelFont("C1", new Font("Dialog", Font.PLAIN, 15));
        a1.setTickLabelPaint("C1", new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.white));
        CategoryAxis a2 = null;
        try {
            a2 = (CategoryAxis) a1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(a1 != a2);
        assertTrue(a1.getClass() == a2.getClass());
        assertTrue(a1.equals(a2));

        // check that changing a tick label font in a1 doesn't change a2
        a1.setTickLabelFont("C1", null);
        assertFalse(a1.equals(a2));
        a2.setTickLabelFont("C1", null);
        assertTrue(a1.equals(a2));

        // check that changing a tick label paint in a1 doesn't change a2
        a1.setTickLabelPaint("C1", Color.yellow);
        assertFalse(a1.equals(a2));
        a2.setTickLabelPaint("C1", Color.yellow);
        assertTrue(a1.equals(a2));

        // check that changing a category label tooltip in a1 doesn't change a2
        a1.addCategoryLabelToolTip("C1", "XYZ");
        assertFalse(a1.equals(a2));
        a2.addCategoryLabelToolTip("C1", "XYZ");
        assertTrue(a1.equals(a2));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        CategoryAxis a1 = new CategoryAxis("Test Axis");
        a1.setTickLabelPaint("C1", new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.white));
        CategoryAxis 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 = (CategoryAxis) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(a1, a2);
    }

}