/*

 * Copyright (c) 2003, 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/* @test

 * @bug 4175312

 * @summary Test StringReader.skip with negative param

 */

import java.io.*;

public class Skip {

    public static void main( String argv[] ) throws Exception {

        StringReader in = new StringReader("1234567");

        // Skip forward and read

        if (in.skip(3) != 3)

            throw new RuntimeException("skip(3) failed");

        if (in.read() != '4')

            throw new RuntimeException("post skip read failure");

        // Skip backward and read

        if (in.skip(-2) != -2)

            throw new RuntimeException("skip(-2) failed");

        if (in.read() != '3')

            throw new RuntimeException("read failed after negative skip");

        // Attempt to skip backward past the beginning and read

        if (in.skip(-6) != -3)

            throw new RuntimeException("skip(-6) failed");

        if (in.read() != '1')

            throw new RuntimeException("read after skip past beginning failed");

        // Skip beyond the end

        if (in.skip(30) != 6)

            throw new RuntimeException("skip(30) failed");

        if (in.read() != -1)

            throw new RuntimeException("read at EOF failed");

        // Test after reaching end of string

        if (in.skip(30) != 0)

            throw new RuntimeException("skip(30) failed");

        if (in.skip(-30) != 0)

            throw new RuntimeException("skip(30) failed");

    }

}