79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
/*
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* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* NASHORN-759 - Efficient string concatenation with + operator
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*
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* @test
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* @run
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*/
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// Check invalidation of callsite for non-string CharSequence
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function checkProps(s) {
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print(typeof s);
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print(typeof s.length);
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print(s.charCodeAt === String.prototype.charCodeAt);
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print();
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}
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var s1 = "foo";
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var s2 = "bar";
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var s3 = s1 + s2 + s1 + s2;
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var s4 = new java.lang.StringBuilder("abc");
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checkProps(s1);
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checkProps(s2);
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checkProps(s3);
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checkProps(s4);
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// Rebuild string and compare to original
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function rebuildString(s) {
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var buf = s.split("");
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print(buf);
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while (buf.length > 1) {
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var result = [];
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buf.reduce(function(previous, current, index) {
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if (previous) {
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result.push(previous + current);
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return null;
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} else if (index === buf.length - 1) {
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result.push(current);
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return null;
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} else {
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return current;
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}
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});
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buf = result;
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print(buf);
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}
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return buf[0];
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}
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var n1 = "The quick gray nashorn jumps over the lazy zebra.";
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var n2 = rebuildString(n1);
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print(n1, n2, n2.length, n1 == n2, n1 === n2, n1 < n2, n1 <= n2, n1 > n2, n1 >= n2);
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checkProps(n2);
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var n3 = rebuildString(rebuildString(n2));
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print(n3, n3.length, n1 == n3, n2 == n3, n1 === n3, n2 === n3);
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checkProps(n3);
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