/*

 * Copyright (c) 2015, 2017, 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 8058779 8054307

 * @library /test/lib

 * @build jdk.test.lib.RandomFactory

 * @run testng LiteralReplace

 * @summary Basic tests of String.replace(CharSequence, CharSequence)

 * @key randomness

 */

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Iterator;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.util.Random;

import jdk.test.lib.RandomFactory;

import org.testng.annotations.Test;

import org.testng.annotations.DataProvider;

import static org.testng.Assert.fail;

public class LiteralReplace {

    @Test(dataProvider="sourceTargetReplacementExpected")

    public void testExpected(String source, String target,

             String replacement, String expected)

    {

        String canonical = canonicalReplace(source, target, replacement);

        if (!canonical.equals(expected)) {

            fail("Canonical: " + canonical + " != " + expected);

        }

        test0(source, target, replacement, expected);

    }

    @Test(dataProvider="sourceTargetReplacement")

    public void testCanonical(String source, String target,

            String replacement)

    {

        String canonical = canonicalReplace(source, target, replacement);

        test0(source, target, replacement, canonical);

    }

    private void test0(String source, String target, String replacement,

            String expected)

    {

        String result = source.replace(target, replacement);

        if (!result.equals(expected)) {

            fail(result + " != " + expected);

        }

    }

    @Test(dataProvider="sourceTargetReplacementWithNull",

            expectedExceptions = {NullPointerException.class})

    public void testNPE(String source, String target, String replacement) {

        source.replace(target, replacement);

    }

    @DataProvider

    public static Object[][] sourceTargetReplacementExpected() {

        return new Object[][] {

            {"aaa", "aa", "b", "ba"},

            {"abcdefgh", "def", "DEF", "abcDEFgh"},

            {"abcdefgh", "123", "DEF", "abcdefgh"},

            {"abcdefgh", "abcdefghi", "DEF", "abcdefgh"},

            {"abcdefghabc", "abc", "DEF", "DEFdefghDEF"},

            {"abcdefghdef", "def", "", "abcgh"},

            {"abcdefgh", "", "_", "_a_b_c_d_e_f_g_h_"},

            {"", "", "", ""},

            {"", "a", "b", ""},

            {"", "", "abc", "abc"},

            {"abcdefgh", "abcdefgh", "abcdefgh", "abcdefgh"},

            {"abcdefgh", "abcdefgh", "abcdefghi", "abcdefghi"},

            {"abcdefgh", "abcdefgh", "", ""},

            {"abcdabcd", "abcd", "", ""},

            {"aaaaaaaaa", "aa", "_X_", "_X__X__X__X_a"},

            {"aaaaaaaaa", "aa", "aaa", "aaaaaaaaaaaaa"},

            {"aaaaaaaaa", "aa", "aa", "aaaaaaaaa"},

            {"a.c.e.g.", ".", "-", "a-c-e-g-"},

            {"abcdefgh", "[a-h]", "X", "abcdefgh"},

            {"aa+", "a+", "", "a"},

            {"^abc$", "abc", "x", "^x$"},

            // more with non-latin1 characters

            {"\u4e00\u4e00\u4e00",

             "\u4e00\u4e00",

             "\u4e01",

             "\u4e01\u4e00"},

            {"\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05\u4e06\u4e07\u4e08",

             "\u4e03\u4e04\u4e05",

             "\u4e10\u4e11\u4e12",

             "\u4e00\u4e01\u4e02\u4e10\u4e11\u4e12\u4e06\u4e07\u4e08"},

            {"\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05\u4e06\u4e07\u4e08",

             "ABC",

             "\u4e10\u4e11\u4e12",

             "\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05\u4e06\u4e07\u4e08"},

            {"\u4e00\u4e01\u4e02\u4e03\u4e04\u4e02\u4e03\u4e07\u4e08",

             "\u4e02\u4e03",

             "\u4e12\u4e13",

             "\u4e00\u4e01\u4e12\u4e13\u4e04\u4e12\u4e13\u4e07\u4e08"},

            {"\u4e00\u4e01\u4e02\u4e03\u4e04\u4e02\u4e03\u4e07\u4e08",

             "\u4e02\u4e03",

             "ab",

             "\u4e00\u4e01ab\u4e04ab\u4e07\u4e08"},

            {"\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05\u4e06\u4e07",

             "",

             "_",

             "_\u4e00_\u4e01_\u4e02_\u4e03_\u4e04_\u4e05_\u4e06_\u4e07_"},

            {"^\u4e00\u4e01\u4e02$",

             "\u4e00\u4e01\u4e02",

             "\u4e03",

             "^\u4e03$"},

            {"", "\u4e00", "\u4e01", ""},

            {"", "", "\u4e00\u4e01\u4e02", "\u4e00\u4e01\u4e02"},

            {"^\u4e00\u4e01\u4e02$",

             "\u4e00\u4e01\u4e02",

             "X",

             "^X$"},

            {"abcdefgh",

             "def",

             "\u4e01",

             "abc\u4e01gh"},

            {"abcdefgh",

             "def",

             "\u4e01\u4e02",

             "abc\u4e01\u4e02gh"},

            {"abcdefabcgh",

             "abc",

             "\u4e01\u4e02",

             "\u4e01\u4e02def\u4e01\u4e02gh"},

            {"abcdefabcghabc",

             "abc",

             "\u4e01\u4e02",

             "\u4e01\u4e02def\u4e01\u4e02gh\u4e01\u4e02"},

            {"\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05",

             "\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05",

             "abcd",

             "abcd"},

            {"\u4e00\u4e01",

             "\u4e00\u4e01",

             "abcdefg",

             "abcdefg"},

            {"\u4e00\u4e01xyz",

             "\u4e00\u4e01",

             "abcdefg",

             "abcdefgxyz"},

            {"\u4e00\u4e00\u4e00\u4e00\u4e00\u4e00",

             "\u4e00\u4e00",

             "\u4e00\u4e00\u4e00",

             "\u4e00\u4e00\u4e00\u4e00\u4e00\u4e00\u4e00\u4e00\u4e00"},

            {"\u4e00\u4e00\u4e00\u4e00\u4e00\u4e00",

             "\u4e00\u4e00\u4e00",

             "\u4e00\u4e00",

             "\u4e00\u4e00\u4e00\u4e00"},

            {"\u4e00.\u4e01.\u4e02.\u4e03.\u4e04.",

             ".",

             "-",

             "\u4e00-\u4e01-\u4e02-\u4e03-\u4e04-"},

            {"\u4e00\u4e00\u4e00\u4e00\u4e00\u4e00",

             "\u4e00",

             "",

             ""},

            {"\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05",

             "\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05",

             "",

             ""},

        };

    }

    @DataProvider

    public static Iterator<Object[]> sourceTargetReplacement() {

        ArrayList<Object[]> list = new ArrayList<>();

        for (int maxSrcLen = 1; maxSrcLen <= (1 << 10); maxSrcLen <<= 1) {

            for (int maxTrgLen = 1; maxTrgLen <= (1 << 10); maxTrgLen <<= 1) {

                for (int maxPrlLen = 1; maxPrlLen <= (1 << 10); maxPrlLen <<= 1) {

                    list.add(makeArray(makeRandomString(maxSrcLen),

                                       makeRandomString(maxTrgLen),

                                       makeRandomString(maxPrlLen)));

                    String source = makeRandomString(maxSrcLen);

                    list.add(makeArray(source,

                                       mekeRandomSubstring(source, maxTrgLen),

                                       makeRandomString(maxPrlLen)));

                }

            }

        }

        return list.iterator();

    }

    @DataProvider

    public static Iterator<Object[]> sourceTargetReplacementWithNull() {

        ArrayList<Object[]> list = new ArrayList<>();

        Object[] arr = {null, "", "a", "b", "string", "str", "ababstrstr"};

        for (int i = 0; i < arr.length; ++i) {

            for (int j = 0; j < arr.length; ++j) {

                for (int k = 0; k < arr.length; ++k) {

                    if (arr[i] != null && (arr[j] == null || arr[k] == null)) {

                        list.add(makeArray(arr[i], arr[j], arr[k]));

                    }

                }

            }

        }

        return list.iterator();

    }

    // utilities

    /**

     * How the String.replace(CharSequence, CharSequence) used to be implemented

     */

    private static String canonicalReplace(String source, String target, String replacement) {

        return Pattern.compile(target.toString(), Pattern.LITERAL).matcher(

                source).replaceAll(Matcher.quoteReplacement(replacement.toString()));

    }

    private static final Random random = RandomFactory.getRandom();

    private static final char[] CHARS = ("qwertyuiop[]12345678" +

        "90-=\\`asdfghjkl;'zxcvbnm,./~!@#$%^&*()_+|QWERTYUIOP{" +

        "}ASDFGHJKL:\"ZXCVBNM<>?\n\r\t\u0444\u044B\u0432\u0430").toCharArray();

    private static String makeRandomString(int maxLen) {

        int len = random.nextInt(maxLen);

        char[] buf = new char[len];

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

            buf[i] = CHARS[random.nextInt(CHARS.length)];

        }

        return new String(buf);

    }

    private static String mekeRandomSubstring(String source, int maxLen) {

        if (source.isEmpty()) {

            return source;

        }

        int pos = random.nextInt(source.length());

        int len = Integer.min(source.length() - pos,

                              random.nextInt(maxLen));

        return source.substring(pos, pos + len);

    }

    private static Object[] makeArray(Object... array) {

         return array;

    }

}