/*

 * Copyright (c) 2018, 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 Basic lines functionality

 * @bug 8200380

 * @run main/othervm Lines

 */

import java.util.Iterator;

import java.util.stream.Stream;

import java.io.BufferedReader;

import java.io.StringReader;

public class Lines {

    public static void main(String... arg) {

        testLines();

    }

    /*

     * Test with strings

     */

    static void testLines() {

        testString("");

        testString(" ");

        testString("\n");

        testString("\n\n\n");

        testString("\r\r\r");

        testString("\r\n\r\n\r\n");

        testString("\n\r\r\n");

        testString("abc\ndef\nghi\n");

        testString("abc\ndef\nghi");

        testString("abc\rdef\rghi\r");

        testString("abc\rdef\rghi");

        testString("abc\r\ndef\r\nghi\r\n");

        testString("abc\r\ndef\r\nghi");

        testString("\2022");

        testString("\2022\n");

        testString("\2022\n\2022\n\2022\n");

        testString("\2022\r\2022\r\2022\r");

        testString("\2022\r\n\2022\r\n\2022\r\n");

        testString("\2022\n\2022\r\2022\r\n");

        testString("abc\2022\ndef\2022\nghi\2022\n");

        testString("abc\2022\ndef\2022\nghi\2022");

        testString("abc\2022\rdef\2022\rghi\2022\r");

        testString("abc\2022\rdef\2022\rghi\2022");

        testString("abc\2022\r\ndef\2022\r\nghi\2022\r\n");

        testString("abc\2022\r\ndef\2022\r\nghi\2022");

        testString("\2022\n\n\n");

    }

    static void testString(String string) {

        Stream<String> lines = string.lines();

        Stream<String> brLines = new BufferedReader(new StringReader(string)).lines();

        Iterator<String> iterator = lines.iterator();

        Iterator<String> brIterator = brLines.iterator();

        int count = 0;

        while (iterator.hasNext() && brIterator.hasNext()) {

            count++;

            String line = iterator.next();

            String brLine = brIterator.next();

            if (!line.equals(brLine)) {

                String replace = string.replaceAll("\n", "\\n").replaceAll("\r", "\\r");

                System.err.format("Mismatch at line %d of \"%s\"%n", count, replace);

                throw new RuntimeException();

            }

        }

        if (iterator.hasNext() || brIterator.hasNext()) {

            System.err.format("Mismatch after line %d of \"%s\"%n", count, string);

            throw new RuntimeException();

        }

    }

}