jfreechart example source code file (LogAxisTests.java)

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Java - jfreechart tags/keywords

awt, categoryplot, column, defaultcategorydataset, epsilon, epsilon, geometry, io, log, logaxis, logaxis, row, row, test, test, xyplot, xyseriescollection

The jfreechart LogAxisTests.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.]
 *
 * -----------------
 * LogAxisTests.java
 * -----------------
 * (C) Copyright 2007, 2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 11-Jul-2007 : Version 1 (DG);
 * 08-Apr-2008 : Fixed incorrect testEquals() 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 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.LogAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
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 LogAxis} class.
 */
public class LogAxisTests extends TestCase {

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

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

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        LogAxis a1 = new LogAxis("Test");
        LogAxis a2 = null;
        try {
            a2 = (LogAxis) 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() {
        LogAxis a1 = new LogAxis("Test");
        LogAxis a2 = new LogAxis("Test");
        assertTrue(a1.equals(a2));

        a1.setBase(2.0);
        assertFalse(a1.equals(a2));
        a2.setBase(2.0);
        assertTrue(a1.equals(a2));

        a1.setSmallestValue(0.1);
        assertFalse(a1.equals(a2));
        a2.setSmallestValue(0.1);
        assertTrue(a1.equals(a2));

        a1.setMinorTickCount(8);
        assertFalse(a1.equals(a2));
        a2.setMinorTickCount(8);
        assertTrue(a1.equals(a2));
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashCode() {
        LogAxis a1 = new LogAxis("Test");
        LogAxis a2 = new LogAxis("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() {
        LogAxis axis = new LogAxis();
        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(94.3874312681693, y1, EPSILON);
        double y2 = axis.java2DToValue(75.0, dataArea, RectangleEdge.RIGHT);
        assertEquals(94.3874312681693, y2, EPSILON);
        double x1 = axis.java2DToValue(75.0, dataArea, RectangleEdge.TOP);
        assertEquals(55.961246381405, x1, EPSILON);
        double x2 = axis.java2DToValue(75.0, dataArea, RectangleEdge.BOTTOM);
        assertEquals(55.961246381405, x2, EPSILON);
        axis.setInverted(true);
        double y3 = axis.java2DToValue(75.0, dataArea, RectangleEdge.LEFT);
        assertEquals(52.9731547179647, y3, EPSILON);
        double y4 = axis.java2DToValue(75.0, dataArea, RectangleEdge.RIGHT);
        assertEquals(52.9731547179647, y4, EPSILON);
        double x3 = axis.java2DToValue(75.0, dataArea, RectangleEdge.TOP);
        assertEquals(89.3475453695651, x3, EPSILON);
        double x4 = axis.java2DToValue(75.0, dataArea, RectangleEdge.BOTTOM);
        assertEquals(89.3475453695651, x4, EPSILON);
    }

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

        LogAxis a1 = new LogAxis("Test Axis");
        LogAxis 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 = (LogAxis) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(a1, a2);

    }

    /**
     * A simple test for the auto-range calculation looking at a
     * LogAxis 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();
        LogAxis axis = new LogAxis("Log(Y)");
        plot.setRangeAxis(axis);
        assertEquals(0.0, axis.getLowerBound(), EPSILON);
        assertEquals(2.6066426411261268E7, axis.getUpperBound(), 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 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();
        LogAxis axis = new LogAxis("Log(Y)");
        plot.setRangeAxis(axis);
        assertEquals(96.59363289248458, axis.getLowerBound(), EPSILON);
        assertEquals(207.0529847682752, 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(895.2712433374774, axis.getLowerBound(), EPSILON);
        assertEquals(1005.2819262292991, 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();
        LogAxis axis = new LogAxis("Log(Y)");
        plot.setRangeAxis(axis);
        assertEquals(0.9465508226401592, axis.getLowerBound(), EPSILON);
        assertEquals(3.1694019256486126, 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();
        LogAxis axis = new LogAxis("Log(Y)");
        plot.setRangeAxis(axis);
        assertEquals(0.9465508226401592, axis.getLowerBound(), EPSILON);
        assertEquals(3.1694019256486126, axis.getUpperBound(), EPSILON);
    }

    /**
     * Some checks for the setLowerBound() method.
     */
    public void testSetLowerBound() {
        LogAxis axis = new LogAxis("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);
    }

    /**
     * Checks the default value for the tickMarksVisible flag.
     */
    public void testTickMarksVisibleDefault() {
        LogAxis axis = new LogAxis("Log Axis");
        assertTrue(axis.isTickMarksVisible());
    }
}