/*

 * Copyright (c) 2000, 2001, 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

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 * questions.

 */

/**

 * @test

 * @bug 6840246 6559590

 * @summary test String.split()

 */

import java.util.Arrays;

import java.util.Random;

import java.util.regex.*;

public class Split {

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

        String source = "0123456789";

        for (int limit=-2; limit<3; limit++) {

            for (int x=0; x<10; x++) {

                String[] result = source.split(Integer.toString(x), limit);

                int expectedLength = limit < 1 ? 2 : limit;

                if ((limit == 0) && (x == 9)) {

                    // expected dropping of ""

                    if (result.length != 1)

                        throw new RuntimeException("String.split failure 1");

                    if (!result[0].equals("012345678")) {

                        throw new RuntimeException("String.split failure 2");

                    }

                } else {

                    if (result.length != expectedLength) {

                        throw new RuntimeException("String.split failure 3");

                    }

                    if (!result[0].equals(source.substring(0,x))) {

                        if (limit != 1) {

                            throw new RuntimeException(

                                "String.split failure 4");

                        } else {

                            if (!result[0].equals(source.substring(0,10))) {

                            throw new RuntimeException(

                                "String.split failure 10");

                            }

                        }

                    }

                    if (expectedLength > 1) { // Check segment 2

                       if (!result[1].equals(source.substring(x+1,10)))

                          throw new RuntimeException("String.split failure 5");

                    }

                }

            }

        }

        // Check the case for no match found

        for (int limit=-2; limit<3; limit++) {

            String[] result = source.split("e", limit);

            if (result.length != 1)

                throw new RuntimeException("String.split failure 6");

            if (!result[0].equals(source))

                throw new RuntimeException("String.split failure 7");

        }

        // Check the case for limit == 0, source = "";

        // split() now returns 0-length for empty source "" see #6559590

        source = "";

        String[] result = source.split("e", 0);

        if (result.length != 1)

            throw new RuntimeException("String.split failure 8");

        if (!result[0].equals(source))

            throw new RuntimeException("String.split failure 9");

        // check fastpath of String.split()

        source = "0123456789abcdefgABCDEFG";

        Random r = new Random();

        for (boolean doEscape: new boolean[] {false, true}) {

            for (int cp = 0; cp < 0x11000; cp++) {

                Pattern p = null;

                String regex = new String(Character.toChars(cp));

                if (doEscape)

                    regex = "\\" + regex;

                try {

                    p = Pattern.compile(regex);

                } catch (PatternSyntaxException pse) {

                    // illegal syntax

                    try {

                        "abc".split(regex);

                    } catch (PatternSyntaxException pse0) {

                        continue;

                    }

                    throw new RuntimeException("String.split failure 11");

                }

                int off = r.nextInt(source.length());

                String[] srcStrs = new String[] {

                    "",

                    source,

                    regex + source,

                    source + regex,

                    source.substring(0, 3)

                        + regex + source.substring(3, 9)

                        + regex + source.substring(9, 15)

                        + regex + source.substring(15),

                    source.substring(0, off) + regex + source.substring(off)

                };

                for (String src: srcStrs) {

                    for (int limit=-2; limit<3; limit++) {

                        if (!Arrays.equals(src.split(regex, limit),

                                           p.split(src, limit)))

                            throw new RuntimeException("String.split failure 12");

                    }

                }

            }

        }

    }

}