numberaxistests.java

jfreechart安装程序和使用说明

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * --------------------
 * NumberAxisTests.java
 * --------------------
 * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: NumberAxisTests.java,v 1.1 2004/08/31 14:31:24 mungady Exp $
 *
 * Changes
 * -------
 * 26-Mar-2003 : Version 1 (DG);
 * 14-Aug-2003 : Added tests for equals(...) method (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.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
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) {
            System.err.println("NumberAxisTests.testCloning: failed to clone.");
        }
        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));

        
    }
    
    /**
     * Tests two doubles for 'near enough' equality.
     * 
     * @param d1  number 1.
     * @param d2  number 2.
     * @param tolerance  maximum tolerance.
     * 
     * @return A boolean.
     */
    private boolean same(double d1, double d2, double tolerance) {
        return (Math.abs(d1 - d2) < tolerance);
    }
    
    /**
     * 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);  
        assertTrue(same(y1, 95.8333333, 0.000001)); 
        double y2 = axis.java2DToValue(75.0, dataArea, RectangleEdge.RIGHT);   
        assertTrue(same(y2, 95.8333333, 0.000001)); 
        double x1 = axis.java2DToValue(75.0, dataArea, RectangleEdge.TOP);   
        assertTrue(same(x1, 58.125, 0.000001)); 
        double x2 = axis.java2DToValue(75.0, dataArea, RectangleEdge.BOTTOM);   
        assertTrue(same(x2, 58.125, 0.000001)); 
        axis.setInverted(true);
        double y3 = axis.java2DToValue(75.0, dataArea, RectangleEdge.LEFT);  
        assertTrue(same(y3, 54.1666667, 0.000001)); 
        double y4 = axis.java2DToValue(75.0, dataArea, RectangleEdge.RIGHT);   
        assertTrue(same(y4, 54.1666667, 0.000001)); 
        double x3 = axis.java2DToValue(75.0, dataArea, RectangleEdge.TOP);   
        assertTrue(same(x3, 91.875, 0.000001)); 
        double x4 = axis.java2DToValue(75.0, dataArea, RectangleEdge.BOTTOM);   
        assertTrue(same(x4, 91.875, 0.000001)); 
        
    }
    
    /**
     * 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) {
            System.out.println(e.toString());
        }
        assertEquals(a1, a2);

    }

    /**
     * A simple test for the auto-range calculation.
     */
    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
        );
        NumberAxis axis = (NumberAxis) chart.getCategoryPlot().getRangeAxis();
        // range should be 0.0 - 210.0
        assertTrue(same(axis.getLowerBound(), 0.0, 0.00001));    
        assertTrue(same(axis.getUpperBound(), 210.0, 0.00001));    
    }
    
    /**
     * A simple test for the auto-range calculation.
     */
    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.createBarChart(
            "Test", 
            "Categories",
            "Value",
            dataset,
            PlotOrientation.VERTICAL,
            false, 
            false,
            false
        );
        NumberAxis axis = (NumberAxis) chart.getCategoryPlot().getRangeAxis();
        axis.setAutoRangeIncludesZero(false);
        // range should be 100.0 - 205.0
        assertTrue(same(axis.getLowerBound(), 95.0, 0.00001));    
        assertTrue(same(axis.getUpperBound(), 205.0, 0.00001));    
    }
    
    /**
     * A simple test for the auto-range calculation.
     */
    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.createBarChart(
            "Test", 
            "Categories",
            "Value",
            dataset,
            PlotOrientation.VERTICAL,
            false, 
            false,
            false
        );
        NumberAxis axis = (NumberAxis) chart.getCategoryPlot().getRangeAxis();
        axis.setAutoRangeIncludesZero(false);
        
        // range should be 100.0 - 205.0
        assertTrue(same(axis.getLowerBound(), 95.0, 0.00001));    
        assertTrue(same(axis.getUpperBound(), 205.0, 0.00001));    
        
        DefaultCategoryDataset dataset2 = new DefaultCategoryDataset();
        dataset2.setValue(900.0, "Row 1", "Column 1");
        dataset2.setValue(1000.0, "Row 1", "Column 2");
        chart.getCategoryPlot().setDataset(dataset2);
        assertTrue(same(axis.getLowerBound(), 895.0, 0.00001));    
        assertTrue(same(axis.getUpperBound(), 1005.0, 0.00001));    
    }
    
}