/*

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 * 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 4074875 4063511 8230342

   @summary Make sure LineNumberReader.read(char, int , int) will increase

            the linenumber correctly.

   */

import java.io.IOException;

import java.io.LineNumberReader;

import java.io.StringReader;

import java.util.function.Consumer;

public class Read {

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

        testReadChars();

        testEofs();

    }

    private static void testReadChars() throws Exception {

        String s = "aaaa\nbbb\n";

        char[] buf = new char[5];

        int n = 0;

        int line = 0;

        LineNumberReader r = new LineNumberReader(new StringReader(s));

        do {

            n = r.read(buf, 0, buf.length);

        } while (n > 0);

        line = r.getLineNumber();

        if (line != 2)

            throw new Exception("Failed test: Expected line number: 2, got "

                                + line);

    }

    private static void testEofs() throws Exception {

        String string = "first \n second";

        Consumer<LineNumberReader> c = (LineNumberReader r) -> {

            try {

                while (r.read() != -1)

                    continue;

            } catch (IOException e) {

                throw new RuntimeException(e);

            }

        };

        testEof(c, string, 1);

        c = (LineNumberReader r) -> {

            try {

                char[] buf = new char[128];

                while (r.read(buf) != -1)

                    continue;

            } catch (IOException e) {

                throw new RuntimeException(e);

            }

        };

        testEof(c, string, 1);

        c = (LineNumberReader r) -> {

            try {

                while (r.readLine() != null)

                    continue;

            } catch (IOException e) {

                throw new RuntimeException(e);

            }

        };

        testEof(c, string, 1);

    }

    private static void testEof(Consumer<LineNumberReader> c, String s, int n)

        throws Exception {

        LineNumberReader r = new LineNumberReader(new StringReader(s));

        c.accept(r);

        int line;

        if ((line = r.getLineNumber()) != n)

            throw new Exception("Failed test: Expected line number: " + n  +

                " , got " + line);

    }

}