/*

 * Copyright (c) 2019, 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 8218280

 * @summary Make sure marking a line feed within a CRLF sequence works correctly

 * @run testng MarkSplitCRLF

 */

import java.io.IOException;

import java.io.LineNumberReader;

import java.io.Reader;

import java.io.StringReader;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

public class MarkSplitCRLF {

    @Test

    public static void testSpecifiedBufferSize() throws IOException {

        final String string = "foo\r\nbar";

        try (Reader reader =

            new LineNumberReader(new StringReader(string), 5)) {

            reader.read();  // 'f'

            reader.read();  // 'o'

            reader.read();  // 'o'

            reader.read();  // '\r' -> '\n'

            reader.mark(1); // mark position of '\n'

            reader.read();  // 'b'

            reader.reset(); // reset to '\n' position

            assertEquals(reader.read(), 'b');

            assertEquals(reader.read(), 'a');

            assertEquals(reader.read(), 'r');

        }

    }

    @Test

    public static void testCRNotFollowedByLF() throws IOException {

        final String string = "foo\rbar";

        try (Reader reader =

            new LineNumberReader(new StringReader(string), 5)) {

            reader.read();  // 'f'

            reader.read();  // 'o'

            reader.read();  // 'o'

            reader.read();  // '\r'

            reader.mark(1); // mark position of next character

            reader.read();  // 'b'

            reader.reset(); // reset to position after '\r'

            assertEquals(reader.read(), 'b');

            assertEquals(reader.read(), 'a');

            assertEquals(reader.read(), 'r');

        }

    }

    @Test

    public static void testDefaultBufferSize() throws IOException {

        StringBuilder sb = new StringBuilder(8195);

        for (int i = 0; i < 8190; i++) {

            char c = (char)i;

            sb.append(c);

        }

        sb.append('\r');

        sb.append('\n');

        sb.append('X');

        sb.append('Y');

        sb.append('Z');

        final String string = sb.toString();

        try (Reader reader = new LineNumberReader(new StringReader(string))) {

            for (int i = 0; i < 8191; i++) reader.read();

            reader.mark(1);

            reader.read();

            reader.reset();

            assertEquals(reader.read(), 'X');

            assertEquals(reader.read(), 'Y');

            assertEquals(reader.read(), 'Z');

        }

    }

}