IndexedImageTypeSpecifierTest.java

/*
 * Copyright (c) 2014, Harald Kuhr
 * All rights reserved.
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 * * Redistributions in binary form must reproduce the above copyright notice,
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 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package com.twelvemonkeys.imageio.util;

import java.awt.image.BufferedImage;
import java.awt.image.DataBuffer;
import java.awt.image.IndexColorModel;

import javax.imageio.ImageTypeSpecifier;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

/**
 * IndexedImageTypeSpecifierTestCase
 *
 * @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
 * @author last modified by $Author: haraldk$
 * @version $Id: IndexedImageTypeSpecifierTestCase.java,v 1.0 Jun 9, 2008 2:42:03 PM haraldk Exp$
 */
public class IndexedImageTypeSpecifierTest {
    @Test
    public void testEquals() {
        IndexColorModel cm = new IndexColorModel(1, 2, new int[]{0xffffff, 0x00}, 0, false, -1, DataBuffer.TYPE_BYTE);

        ImageTypeSpecifier spec = new IndexedImageTypeSpecifier(cm);
        ImageTypeSpecifier other = new IndexedImageTypeSpecifier(cm);
        ImageTypeSpecifier different = new IndexedImageTypeSpecifier(new IndexColorModel(2, 2, new int[]{0xff00ff, 0x00, 0xff00ff, 0x00}, 0, false, -1, DataBuffer.TYPE_BYTE));

        assertEquals(spec, other);
        assertEquals(other, spec);

        assertEquals(spec.hashCode(), other.hashCode());

        // TODO: There is still a problem that IndexColorModel does not override equals,
        // so any model with the same number of bits, transparency, and transfer type will be treated as equal
        assertNotEquals(other, different);
    }

    @Test
    public void testHashCode() {
        IndexColorModel cm = new IndexColorModel(1, 2, new int[]{0xffffff, 0x00}, 0, false, -1, DataBuffer.TYPE_BYTE);

        ImageTypeSpecifier spec = new IndexedImageTypeSpecifier(cm);
        ImageTypeSpecifier other = new IndexedImageTypeSpecifier(cm);
        ImageTypeSpecifier different = new IndexedImageTypeSpecifier(new IndexColorModel(2, 2, new int[]{0xff00ff, 0x00, 0xff00ff, 0x00}, 0, false, -1, DataBuffer.TYPE_BYTE));

        // TODO: There is still a problem that IndexColorModel does not override hashCode,
        // so any model with the same number of bits, transparency, and transfer type will have same hash
        assertEquals(spec.hashCode(), other.hashCode());
        assertNotEquals(spec.hashCode(), different.hashCode());
    }

    @Test
    public void testCreateNull() {
        assertThrows(IllegalArgumentException.class, () -> new IndexedImageTypeSpecifier(null));
    }

    @Test
    public void testCreateBufferedImageBinary() {
        IndexColorModel cm = new IndexColorModel(1, 2, new int[]{0xffffff, 0x00}, 0, false, -1, DataBuffer.TYPE_BYTE);
        ImageTypeSpecifier spec = new IndexedImageTypeSpecifier(cm);

        BufferedImage image = spec.createBufferedImage(2, 2);

        assertNotNull(image);
        assertEquals(BufferedImage.TYPE_BYTE_BINARY, image.getType());
        assertEquals(cm, image.getColorModel());
    }

    @Test
    public void testCreateBufferedImageIndexed() {
        IndexColorModel cm = new IndexColorModel(8, 256, new int[256], 0, false, -1, DataBuffer.TYPE_BYTE);
        ImageTypeSpecifier spec = new IndexedImageTypeSpecifier(cm);

        BufferedImage image = spec.createBufferedImage(2, 2);

        assertNotNull(image);
        assertEquals(BufferedImage.TYPE_BYTE_INDEXED, image.getType());
        assertEquals(cm, image.getColorModel());
    }
}