/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2013, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------------------
* GrayPaintScaleTests.java
* ------------------------
* (C) Copyright 2006-2013, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 05-Jul-2006 : Version 1 (DG);
* 26-Sep-2007 : Added testConstructor() and testGetPaint() (DG);
* 29-Jan-2009 : Extended testEquals() for new alpha field (DG);
*
*/
package org.jfree.chart.renderer;
import org.junit.Test;
import java.awt.Color;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertSame;
/**
* Tests for the {@link GrayPaintScale} class.
*/
public class GrayPaintScaleTest {
private static final double EPSILON = 0.000000001;
/**
* Simple check for the default constructor.
*/
@Test
public void testConstructor() {
GrayPaintScale gps = new GrayPaintScale();
assertEquals(0.0, gps.getLowerBound(), EPSILON);
assertEquals(1.0, gps.getUpperBound(), EPSILON);
assertEquals(255, gps.getAlpha());
}
/**
* Some checks for the getPaint() method.
*/
@Test
public void testGetPaint() {
GrayPaintScale gps = new GrayPaintScale();
Color c = (Color) gps.getPaint(0.0);
assertEquals(c, Color.BLACK);
c = (Color) gps.getPaint(1.0);
assertEquals(c, Color.WHITE);
// check lookup values that are outside the bounds - see bug report
// 1767315
c = (Color) gps.getPaint(-0.5);
assertEquals(c, Color.BLACK);
c = (Color) gps.getPaint(1.5);
assertEquals(c, Color.WHITE);
// add a check for Double.NAN
c = (Color) gps.getPaint(Double.NaN);
assertEquals(c, Color.BLACK);
c = (Color) gps.getPaint(Double.POSITIVE_INFINITY);
assertEquals(c, Color.WHITE);
c = (Color) gps.getPaint(Double.NEGATIVE_INFINITY);
assertEquals(c, Color.BLACK);
}
/**
* A test for the equals() method.
*/
@Test
public void testEquals() {
GrayPaintScale g1 = new GrayPaintScale();
GrayPaintScale g2 = new GrayPaintScale();
assertEquals(g1, g2);
assertEquals(g2, g1);
g1 = new GrayPaintScale(0.0, 1.0);
g2 = new GrayPaintScale(0.0, 1.0);
assertEquals(g1, g2);
g1 = new GrayPaintScale(0.1, 1.0);
assertFalse(g1.equals(g2));
g2 = new GrayPaintScale(0.1, 1.0);
assertEquals(g1, g2);
g1 = new GrayPaintScale(0.1, 0.9);
assertFalse(g1.equals(g2));
g2 = new GrayPaintScale(0.1, 0.9);
assertEquals(g1, g2);
g1 = new GrayPaintScale(0.1, 0.9, 128);
assertFalse(g1.equals(g2));
g2 = new GrayPaintScale(0.1, 0.9, 128);
assertEquals(g1, g2);
}
/**
* Confirm that cloning works.
*/
@Test
public void testCloning() throws CloneNotSupportedException {
GrayPaintScale g1 = new GrayPaintScale();
GrayPaintScale g2 = (GrayPaintScale) g1.clone();
assertNotSame(g1, g2);
assertSame(g1.getClass(), g2.getClass());
assertEquals(g1, g2);
}
/**
* Serialize an instance, restore it, and check for equality.
*/
@Test
public void testSerialization() throws IOException, ClassNotFoundException {
GrayPaintScale g1 = new GrayPaintScale();
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
ObjectOutput out = new ObjectOutputStream(buffer);
out.writeObject(g1);
out.close();
ObjectInput in = new ObjectInputStream(
new ByteArrayInputStream(buffer.toByteArray()));
GrayPaintScale g2 = (GrayPaintScale) in.readObject();
in.close();
assertEquals(g1, g2);
}
}