test/jdk/java/io/StreamTokenizer/Reset.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * 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 4090992
   @summary Make sure StreamTokenizer.nextToken works correctly when
            the underlying stream is reset after the end of stream has
            reached.
   */

import java.io.*;

public class Reset {

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

        StringBufferInputStream in = new StringBufferInputStream("[ #");
        StreamTokenizer scan = new StreamTokenizer(in);

        scan.nextToken();
        scan.nextToken();
        in.reset();
        int token = scan.nextToken();
        if (token != '[') {
            throw new Exception
                ("Test failed: should get token [, but get " + token);
        }
    }
}