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 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 */

 /*
  * @test
  * @bug     6294607
  * @summary Test verifies whether getCompressionTypes() returns only one
  *          compression type(LZW) for GIF and not more than that.
  * @run     main GIFCompressionTypesTest
  */

import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;

public class GIFCompressionTypesTest {

    static ImageWriter writer = null;

    public static void main(String args[]) {
        Iterator it = ImageIO.getImageWritersByFormatName("gif");
        while (it.hasNext()) {
            writer = (ImageWriter) it.next();
            break;
        }
        ImageWriteParam param = writer.getDefaultWriteParam();

        param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
        String compTypes[] = param.getCompressionTypes();
        // In GIF we support only one compression type : LZW
        if (compTypes.length != 1) {
            throw new RuntimeException("We support only one compression"
                    + " type in GIF : LZW");
        }
    }
}