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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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59
test/jdk/java/lang/String/CaseConvertSameInstance.java Normal file
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/*
* Copyright (c) 1998, 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 4130097
@summary toUpperCase and toLowerCase always return a new String,
whereas if there is no conversion that needs to be done,
they should be returning the same instance.
@author James Bond/007
*/
public class CaseConvertSameInstance {
public static void main(String[] args) throws Exception {
/* these two are the real tests for this bug. */
if ("foobar".toLowerCase() != "foobar")
throw new Exception("toLowerCase returned different object");
if ("FOOBAR".toUpperCase() != "FOOBAR")
throw new Exception("toUpperCase returned different object");
/* sanity test toLowerCase with some border conditions. */
if (!("FooBar".toLowerCase().equals("foobar")))
throw new Exception("toLowerCase broken");
if (!("fooBar".toLowerCase().equals("foobar")))
throw new Exception("toLowerCase broken");
if (!("foobaR".toLowerCase().equals("foobar")))
throw new Exception("toLowerCase broken");
if (!("FOOBAR".toLowerCase().equals("foobar")))
throw new Exception("toLowerCase broken");
/* sanity test toUpperCase with some border conditions. */
if (!("FooBar".toUpperCase().equals("FOOBAR")))
throw new Exception("toUpperCase broken");
if (!("fooBar".toUpperCase().equals("FOOBAR")))
throw new Exception("toUpperCase broken");
if (!("foobaR".toUpperCase().equals("FOOBAR")))
throw new Exception("toUpperCase broken");
if (!("foobar".toUpperCase().equals("FOOBAR")))
throw new Exception("toUpperCase broken");
}
}