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test/script/basic/NASHORN-759.js@ac62e33a99b0 (annotated)

test/script/basic/NASHORN-759.js

Wed, 20 Aug 2014 10:25:28 +0200

author

attila

date

Wed, 20 Aug 2014 10:25:28 +0200

changeset 962

ac62e33a99b0

parent 7

5a1b0714df0e

child 1205

4112748288bb

permissions

-rw-r--r--

8044638: Tidy up Nashorn codebase for code standards
8055199: Tidy up Nashorn codebase for code standards (August 2014)
Reviewed-by: lagergren, sundar

jlaskey@3	1	/*
jlaskey@7	2	* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
jlaskey@3	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
attila@962	4	*
jlaskey@3	5	* This code is free software; you can redistribute it and/or modify it
jlaskey@3	6	* under the terms of the GNU General Public License version 2 only, as
jlaskey@3	7	* published by the Free Software Foundation.
attila@962	8	*
jlaskey@3	9	* This code is distributed in the hope that it will be useful, but WITHOUT
jlaskey@3	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jlaskey@3	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
jlaskey@3	12	* version 2 for more details (a copy is included in the LICENSE file that
jlaskey@3	13	* accompanied this code).
attila@962	14	*
jlaskey@3	15	* You should have received a copy of the GNU General Public License version
jlaskey@3	16	* 2 along with this work; if not, write to the Free Software Foundation,
jlaskey@3	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
attila@962	18	*
jlaskey@3	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jlaskey@3	20	* or visit www.oracle.com if you need additional information or have any
jlaskey@3	21	* questions.
jlaskey@3	22	*/
jlaskey@3	23
jlaskey@3	24	/*
jlaskey@3	25	* NASHORN-759 - Efficient string concatenation with + operator
jlaskey@3	26	*
jlaskey@3	27	* @test
jlaskey@3	28	* @run
jlaskey@3	29	*/
jlaskey@3	30
jlaskey@3	31	// Check invalidation of callsite for non-string CharSequence
jlaskey@3	32	function checkProps(s) {
jlaskey@3	33	print(typeof s);
jlaskey@3	34	print(typeof s.length);
jlaskey@3	35	print(s.charCodeAt === String.prototype.charCodeAt);
jlaskey@3	36	print();
jlaskey@3	37	}
jlaskey@3	38
jlaskey@3	39	var s1 = "foo";
jlaskey@3	40	var s2 = "bar";
jlaskey@3	41	var s3 = s1 + s2 + s1 + s2;
jlaskey@3	42	var s4 = new java.lang.StringBuilder("abc");
jlaskey@3	43	checkProps(s1);
jlaskey@3	44	checkProps(s2);
jlaskey@3	45	checkProps(s3);
jlaskey@3	46	checkProps(s4);
jlaskey@3	47
jlaskey@3	48	// Rebuild string and compare to original
jlaskey@3	49	function rebuildString(s) {
jlaskey@3	50	var buf = s.split("");
jlaskey@3	51	print(buf);
jlaskey@3	52	while (buf.length > 1) {
jlaskey@3	53	var result = [];
jlaskey@3	54	buf.reduce(function(previous, current, index) {
jlaskey@3	55	if (previous) {
jlaskey@3	56	result.push(previous + current);
jlaskey@3	57	return null;
jlaskey@3	58	} else if (index === buf.length - 1) {
jlaskey@3	59	result.push(current);
jlaskey@3	60	return null;
jlaskey@3	61	} else {
jlaskey@3	62	return current;
jlaskey@3	63	}
jlaskey@3	64	});
jlaskey@3	65	buf = result;
jlaskey@3	66	print(buf);
jlaskey@3	67	}
jlaskey@3	68	return buf[0];
jlaskey@3	69	}
jlaskey@3	70
jlaskey@3	71	var n1 = "The quick gray nashorn jumps over the lazy zebra.";
jlaskey@3	72	var n2 = rebuildString(n1);
jlaskey@3	73	print(n1, n2, n2.length, n1 == n2, n1 === n2, n1 < n2, n1 <= n2, n1 > n2, n1 >= n2);
jlaskey@3	74	checkProps(n2);
jlaskey@3	75
jlaskey@3	76	var n3 = rebuildString(rebuildString(n2));
jlaskey@3	77	print(n3, n3.length, n1 == n3, n2 == n3, n1 === n3, n2 === n3);
jlaskey@3	78	checkProps(n3);