MarkReset.java

/*
 * Copyright (c) 1998, 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  4017159
   @summary Check if mark and reset of LineNumberInputStream works
            correctly.
   */

import java.io.*;

public class MarkReset {

    public static void main(String[] args) throws Exception {
        LineNumberInputStream in = new
            LineNumberInputStream(new StringBufferInputStream("\rabcd"));

        in.read();
        in.mark(100);
        int b1 = in.read();
        in.reset();
        int b2 = in.read();

        if(b1 != b2)
            throw new Exception("Read Wrong bytes: Expected " + b1 + " got " + b2);
    }
}