/*

 * Copyright (c) 2010, 2013, 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.

 */

/*

 * NASHORN-759 - Efficient string concatenation with + operator

 *

 * @test

 * @run

 */

// Check invalidation of callsite for non-string CharSequence

function checkProps(s) {

    print(typeof s);

    print(typeof s.length);

    print(s.charCodeAt === String.prototype.charCodeAt);

    print();

}

var s1 = "foo";

var s2 = "bar";

var s3 = s1 + s2 + s1 + s2;

var s4 = new java.lang.StringBuilder("abc");

checkProps(s1);

checkProps(s2);

checkProps(s3);

checkProps(s4);

// Rebuild string and compare to original

function rebuildString(s) {

    var buf = s.split("");

    print(buf);

    while (buf.length > 1) {

        var result = [];

        buf.reduce(function(previous, current, index) {

            if (previous) {

                result.push(previous + current);

                return null;

            } else if (index === buf.length - 1) {

                result.push(current);

                return null;

            } else {

                return current;

            }

        });

        buf = result;

        print(buf);

    }

    return buf[0];

}

var n1 = "The quick gray nashorn jumps over the lazy zebra.";

var n2 = rebuildString(n1);

print(n1, n2, n2.length, n1 == n2, n1 === n2, n1 < n2, n1 <= n2, n1 > n2, n1 >= n2);

checkProps(n2);

var n3 = rebuildString(rebuildString(n2));

print(n3, n3.length, n1 == n3, n2 == n3, n1 === n3, n2 === n3);

checkProps(n3);