/*

 * Copyright (c) 2000, 2004, 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

 * @bug 4242309 4982981

 * @summary Test equals and contentEquals in String

 * @key randomness

 */

import java.util.Random;

import java.nio.CharBuffer;

// Yes, I used cut and paste for this test. Yes more code

// sharing could have been accomplished.

public class ContentEquals {

    private static Random rnd = new Random();

    private static final int ITERATIONS = 1000;

    private static final int STR_LEN = 20;

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

        testStringBuffer();

        testStringBuilder();

        testString();

        testCharSequence();

    }

    // Test a StringBuffer, which uses the old method from 1.4

    public static void testStringBuffer() throws Exception {

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

            int length = rnd.nextInt(STR_LEN) + 1;

            StringBuffer testStringBuffer = new StringBuffer();

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

                char aChar = (char)rnd.nextInt();

                testStringBuffer.append(aChar);

            }

            String testString = testStringBuffer.toString();

            char c = testStringBuffer.charAt(0);

            testStringBuffer.setCharAt(0, 'c');

            testStringBuffer.setCharAt(0, c);

            if (!testString.contentEquals(testStringBuffer))

                throw new RuntimeException("ContentsEqual failure");

        }

    }

    // Test StringBuilder as a CharSequence using new method in 1.5

    public static void testStringBuilder() throws Exception {

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

            int length = rnd.nextInt(STR_LEN) + 1;

            StringBuilder testStringBuilder = new StringBuilder();

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

                char aChar = (char)rnd.nextInt();

                testStringBuilder.append(aChar);

            }

            String testString = testStringBuilder.toString();

            char c = testStringBuilder.charAt(0);

            testStringBuilder.setCharAt(0, 'c');

            testStringBuilder.setCharAt(0, c);

            if (!testString.contentEquals(testStringBuilder))

                throw new RuntimeException("ContentsEqual failure");

        }

    }

    // Test a String as a CharSequence. This takes a different codepath in

    // the new method in 1.5

    public static void testString() throws Exception {

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

            int length = rnd.nextInt(STR_LEN) + 1;

            StringBuilder testStringBuilder = new StringBuilder();

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

                char aChar = (char)rnd.nextInt();

                testStringBuilder.append(aChar);

            }

            String testString = testStringBuilder.toString();

            char c = testStringBuilder.charAt(0);

            testStringBuilder.setCharAt(0, 'c');

            testStringBuilder.setCharAt(0, c);

            if (!testString.contentEquals(testStringBuilder.toString()))

                throw new RuntimeException("ContentsEqual failure");

        }

    }

    // Test a CharSequence that is not an AbstractStringBuilder,

    // this takes a different codepath in the new method in 1.5

    public static void testCharSequence() throws Exception {

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

            int length = rnd.nextInt(STR_LEN) + 1;

            StringBuilder testStringBuilder = new StringBuilder();

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

                char aChar = (char)rnd.nextInt();

                testStringBuilder.append(aChar);

            }

            String testString = testStringBuilder.toString();

            char c = testStringBuilder.charAt(0);

            testStringBuilder.setCharAt(0, 'c');

            testStringBuilder.setCharAt(0, c);

            CharBuffer buf = CharBuffer.wrap(testStringBuilder.toString());

            if (!testString.contentEquals(buf))

                throw new RuntimeException("ContentsEqual failure");

        }

    }

}