/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2007-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.image.io;
import java.awt.image.IndexColorModel;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import org.junit.*;
import static org.junit.Assert.*;
/**
* Tests {@link Palette} and {@link PaletteFactory}.
*
*
* @source $URL$
* @version $Id$
* @author Martin Desruisseaux
*/
public final class PaletteTest {
/**
* Tests the argument check performed by constructor.
*/
@Test
public void testConstructor() {
final PaletteFactory factory = PaletteFactory.getDefault();
assertEquals(100, new IndexedPalette(factory, "grayscale", 0, 100, 100, 1, 0).upper);
assertEquals( 50, new IndexedPalette(factory, "grayscale", -100, 50, 100, 1, 0).upper);
try {
new IndexedPalette(factory, "grayscale", 0, 100, -100, 1, 0);
fail("Should not accept negative size.");
} catch (IllegalArgumentException e) {
// This is the expected exception.
}
try {
new IndexedPalette(factory, "grayscale", 100, 50, 256, 1, 0);
fail("Should not accept invalid range.");
} catch (IllegalArgumentException e) {
// This is the expected exception.
}
assertEquals(40000, new IndexedPalette(factory, "grayscale", 1, 40000, 0xFFFF, 1, 0).upper);
try {
new IndexedPalette(factory, "grayscale", -1, 40000, 0xFFFF, 1, 0);
fail("Should not accept value out of range.");
} catch (IllegalArgumentException e) {
// This is the expected exception.
}
try {
new IndexedPalette(factory, "grayscale", 1, 70000, 0xFFFF, 1, 0);
fail("Should not accept value out of range.");
} catch (IllegalArgumentException e) {
// This is the expected exception.
}
try {
new IndexedPalette(factory, "grayscale", -40000, 0, 0xFFFF, 1, 0);
fail("Should not accept value out of range.");
} catch (IllegalArgumentException e) {
// This is the expected exception.
}
}
/**
* Tests {@link PaletteFactory#getAvailableNames}.
*/
@Test
public void testAvailableNames() {
final List<String> names = Arrays.asList(PaletteFactory.getDefault().getAvailableNames());
assertFalse(names.isEmpty());
assertTrue (names.contains("rainbow"));
assertTrue (names.contains("grayscale"));
assertTrue (names.contains("bell"));
assertFalse(names.contains("Donald Duck"));
}
/**
* Tests the cache.
*/
@Test
public void testCache() {
final PaletteFactory factory = PaletteFactory.getDefault();
final Palette first = factory.getPalettePadValueFirst("rainbow", 100);
final Palette second = factory.getPalettePadValueFirst("bell", 100);
final Palette third = factory.getPalettePadValueFirst("rainbow", 100);
assertEquals (first, third);
assertSame (first, third);
assertNotSame(first, second);
}
/**
* Tests the color model.
*
* @throws IOException If an I/O operation was required and failed.
*/
@Test
public void testColorModel() throws IOException {
final PaletteFactory factory = PaletteFactory.getDefault();
final Palette palette = factory.getPalettePadValueFirst("rainbow", 100);
final IndexColorModel icm = (IndexColorModel) palette.getColorModel();
assertEquals(100, icm.getMapSize());
assertEquals(0, icm.getTransparentPixel());
}
}