/*

 * Copyright (c) 1997, 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

   @summary General tests for BufferedReader.mark

 */

import java.io.*;

public class BufferedReaderMark {

    static int bufferSize = -1;

    static int inputSize = -1;

    static String d2(int n) {

        String s = Integer.toString(n);

        if (s.length() < 2)

            return s + " ";

        else

            return s;

    }

    static void fail(String s) {

        throw new RuntimeException(s);

    }

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

        PrintStream log = System.err;

        if (bufferSize == -1)

            bufferSize = 7;

        if (inputSize == -1)

            inputSize = bufferSize * 3;

        try {

            Reader in = new BufferedReader(new ABCReader(inputSize), bufferSize);

            char buf[] = new char[bufferSize];

            if (in.read(buf) != bufferSize)

                fail("Read failed");

            in.reset();

            fail("reset() didn't throw");

        }

        catch (IOException x) {

            if (x.getMessage().equals("Stream not marked"))

                log.println("Unmarked-stream test OK");

            else

                fail(x.toString());

        }

        boolean err = false;

        try {

            Reader in = new BufferedReader(new ABCReader(inputSize), bufferSize);

            char buf[] = new char[bufferSize];

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

                fail("Read 1 failed");

            in.mark(bufferSize);

            while (in.read() != -1);

            in.reset();

            fail("reset() didn't throw");

        }

        catch (IOException x) {

            if (x.getMessage().equals("Mark invalid")) {

                err = true;

                log.println("Invalid-mark test OK");

            }

            else {

                log.println("Invalid-mark test failed: " + x);

                fail(x.toString());

            }

        }

        if (! err)

            fail("Invalid-mark test failed: Exception not thrown");

        int c;

        for (int off = 0; off < bufferSize * 2; off++) {

            for (int ra = 0; ra <= inputSize + 2; ra++) {

                Reader in = new BufferedReader(new ABCReader(inputSize), bufferSize);

                log.print(d2(off) + ", " + d2(ra) + "  mark: ");

                for (int i = 0; i < off; i++) {

                    if ((c = in.read()) == -1) {

                        log.print("<EOF>");

                        break;

                    }

                    log.print((char) c);

                }

                in.mark(ra);

                for (int i = 0; i < ra; i++) {

                    if ((c = in.read()) == -1) {

                        log.print("<EOF>");

                        break;

                    }

                    log.print((char) c);

                }

                log.println();

                log.print(d2(off) + ", " + d2(ra) + " reset: ");

                in.reset();

                for (int i = 0; i < off; i++)

                    log.print(' ');

                for (;;) {

                    if ((c = in.read()) == -1) {

                        log.print("<EOF>");

                        break;

                    }

                    log.print((char) c);

                }

                log.println();

            }

        }

    }

}