/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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.]
*
* -------------------------
* LogarithmicAxisTests.java
* -------------------------
* (C) Copyright 2003-2007, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 26-Mar-2003 : Version 1 (DG);
* 02-Mar-2007 : Added tests from bug report 880597 (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.axis.LogarithmicAxis;
import org.jfree.ui.RectangleEdge;
/**
* Tests for the {@link LogarithmicAxis} class.
*/
public class LogarithmicAxisTests extends TestCase {
static class MyLogarithmicAxis extends LogarithmicAxis {
/**
* Creates a new instance.
*
* @param label the label.
*/
public MyLogarithmicAxis(String label) {
super(label);
}
/* (non-Javadoc)
* @see org.jfree.chart.axis.LogarithmicAxis#switchedLog10(double)
*/
protected double switchedLog10(double val) {
return super.switchedLog10(val);
}
}
/** Tolerance for floating point comparisons */
public static double EPSILON = 0.000001;
MyLogarithmicAxis axis = null;
/**
* Returns the tests as a test suite.
*
* @return The test suite.
*/
public static Test suite() {
return new TestSuite(LogarithmicAxisTests.class);
}
/**
* Constructs a new set of tests.
*
* @param name the name of the tests.
*/
public LogarithmicAxisTests(String name) {
super(name);
}
/**
* Sets up a new axis.
*
* @throws Exception
*/
protected void setUp() throws Exception {
this.axis = new MyLogarithmicAxis("Value (log)");
this.axis.setAllowNegativesFlag(false);
this.axis.setLog10TickLabelsFlag(false);
this.axis.setLowerMargin(0.0);
this.axis.setUpperMargin(0.0);
this.axis.setLowerBound(0.2);
this.axis.setUpperBound(100.0);
}
/**
* Serialize an instance, restore it, and check for equality.
*/
public void testSerialization() {
LogarithmicAxis a1 = new LogarithmicAxis("Test Axis");
LogarithmicAxis 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 = (LogarithmicAxis) in.readObject();
in.close();
}
catch (Exception e) {
e.printStackTrace();
}
assertEquals(a1, a2);
}
/**
* Test if adjustedLog10 and adjustedPow10 are inverses of each other
*/
public void testAdjustedLog10() {
checkLogPowRoundTrip(20);
checkLogPowRoundTrip(10);
checkLogPowRoundTrip(5);
checkLogPowRoundTrip(2);
checkLogPowRoundTrip(1);
checkLogPowRoundTrip(0.5);
checkLogPowRoundTrip(0.2);
checkLogPowRoundTrip(0.0001);
}
private void checkLogPowRoundTrip(double value) {
assertEquals("log(pow(x)) = x", value, this.axis.adjustedLog10(
this.axis.adjustedPow10(value)), EPSILON);
assertEquals("pow(log(x)) = x", value, this.axis.adjustedPow10(
this.axis.adjustedLog10(value)), EPSILON);
}
/**
* Test if switchedLog10 and switchedPow10 are inverses of each other
*/
public void testSwitchedLog10() {
assertFalse("Axis should not allow negative values",
this.axis.getAllowNegativesFlag());
assertEquals(Math.log(0.5) / LogarithmicAxis.LOG10_VALUE,
this.axis.switchedLog10(0.5), EPSILON);
checkSwitchedLogPowRoundTrip(20);
checkSwitchedLogPowRoundTrip(10);
checkSwitchedLogPowRoundTrip(5);
checkSwitchedLogPowRoundTrip(2);
checkSwitchedLogPowRoundTrip(1);
checkSwitchedLogPowRoundTrip(0.5);
checkSwitchedLogPowRoundTrip(0.2);
checkSwitchedLogPowRoundTrip(0.0001);
}
private void checkSwitchedLogPowRoundTrip(double value) {
assertEquals("log(pow(x)) = x", value, this.axis.switchedLog10(
this.axis.switchedPow10(value)), EPSILON);
assertEquals("pow(log(x)) = x", value, this.axis.switchedPow10(
this.axis.switchedLog10(value)), EPSILON);
}
/**
* Test of java2DToValue method.
*/
public void testJava2DToValue() {
Rectangle2D plotArea = new Rectangle2D.Double(22, 33, 500, 500);
RectangleEdge edge = RectangleEdge.BOTTOM;
// set axis bounds to be both greater than 1
this.axis.setRange(10, 20);
checkPointsToValue(edge, plotArea);
// check for bounds interval that includes 1
this.axis.setRange(0.5, 10);
checkPointsToValue(edge, plotArea);
// check for bounds interval that includes 1
this.axis.setRange(0.2, 20);
checkPointsToValue(edge, plotArea);
// check for both bounds smaller than 1
this.axis.setRange(0.2, 0.7);
checkPointsToValue(edge, plotArea);
}
/**
* Test of valueToJava2D method.
*/
public void testValueToJava2D() {
Rectangle2D plotArea = new Rectangle2D.Double(22, 33, 500, 500);
RectangleEdge edge = RectangleEdge.BOTTOM;
// set axis bounds to be both greater than 1
this.axis.setRange(10, 20);
checkPointsToJava2D(edge, plotArea);
// check for bounds interval that includes 1
this.axis.setRange(0.5, 10);
checkPointsToJava2D(edge, plotArea);
// check for bounds interval that includes 1
this.axis.setRange(0.2, 20);
checkPointsToJava2D(edge, plotArea);
// check for both bounds smaller than 1
this.axis.setRange(0.2, 0.7);
checkPointsToJava2D(edge, plotArea);
}
private void checkPointsToJava2D(RectangleEdge edge,
Rectangle2D plotArea) {
assertEquals("Left most point on the axis should be beginning of "
+ "range.", plotArea.getX(), this.axis.valueToJava2D(
this.axis.getLowerBound(), plotArea, edge), EPSILON);
assertEquals("Right most point on the axis should be end of range.",
plotArea.getX() + plotArea.getWidth(),
this.axis.valueToJava2D(this.axis.getUpperBound(),
plotArea, edge), EPSILON);
assertEquals("Center point on the axis should geometric mean of the bounds.",
plotArea.getX() + (plotArea.getWidth() / 2),
this.axis.valueToJava2D(Math.sqrt(this.axis.getLowerBound()
* this.axis.getUpperBound()), plotArea, edge), EPSILON);
}
/**
* Check the translation java2D to value for left, right, and center point.
*/
private void checkPointsToValue(RectangleEdge edge, Rectangle2D plotArea) {
assertEquals("Right most point on the axis should be end of range.",
this.axis.getUpperBound(), this.axis.java2DToValue(
plotArea.getX() + plotArea.getWidth(), plotArea, edge),
EPSILON);
assertEquals("Left most point on the axis should be beginning of "
+ "range.", this.axis.getLowerBound(),
this.axis.java2DToValue(plotArea.getX(), plotArea, edge),
EPSILON);
assertEquals("Center point on the axis should geometric mean of the "
+ "bounds.", Math.sqrt(this.axis.getUpperBound()
* this.axis.getLowerBound()), this.axis.java2DToValue(
plotArea.getX() + (plotArea.getWidth() / 2), plotArea, edge),
EPSILON);
}
/**
* Runs all tests in this class.
*
* @param args ignored.
*/
public static void main(String[] args) {
junit.textui.TestRunner.run(LogarithmicAxisTests.class);
}
}