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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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test/jdk/java/text/Format/ChoiceFormat/Bug8001209.java Normal file
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/*
* Copyright (c) 2012, 2023, 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 8001209
* @summary Confirm that the values set by setChoices() are not mutable.
* @run junit Bug8001209
*/
import java.text.ChoiceFormat;
import java.text.ParsePosition;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class Bug8001209 {
// Represents the expected output of formatting the ChoiceFormat
private static String expectedFormattedOutput;
private static ChoiceFormat cFmt;
private static ParsePosition status;
private static String[] originalSetterArray;
// Build the original ChoiceFormat to test if it can be mutated
@BeforeAll
static void setUpChoiceFormatAndOutput() {
double[] limits = {1, 2, 3, 4, 5, 6, 7};
originalSetterArray = new String[]{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
// Constructor calls setChoices
cFmt = new ChoiceFormat(limits, originalSetterArray);
status = new ParsePosition(0);
// Build the expected results of formatting with the original ChoiceFormat
StringBuilder before = new StringBuilder();
for (double i = 1.0; i <= 7.0; ++i) {
status.setIndex(0);
String s = cFmt.format(i);
before.append(" ");
before.append(s);
before.append(cFmt.parse(cFmt.format(i), status));
}
expectedFormattedOutput = before.toString();
}
/*
* Ensure that mutating the arrays returned by getChoices and getLimits does
* not affect the internal representation of the ChoiceFormat.
*/
@Test
public void immutableArraysFromGetters() {
// Modify the array returned by getFormats() -> newFormats
String[] newFormats = (String[]) cFmt.getFormats();
newFormats[6] = "Doyoubi";
StringBuilder after = new StringBuilder();
for (double i = 1.0; i <= 7.0; ++i) {
status.setIndex(0);
String s = cFmt.format(i);
after.append(" ");
after.append(s);
after.append(cFmt.parse(cFmt.format(i), status));
}
// Compare the expected results with the new formatted results
assertEquals(after.toString(), expectedFormattedOutput,
"Mutating array returned from getter changed internals of ChoiceFormat");
}
/*
* Ensure that mutating the arrays passed to setChoices/constructor does
* not affect the internal representation of the ChoiceFormat.
*/
@Test
public void immutableArraysFromSetter() {
// Modify the array passed to setFormats() -> dayOfWeekNames
originalSetterArray[6] = "Saturday";
StringBuilder after = new StringBuilder();
for (double i = 1.0; i <= 7.0; ++i) {
status.setIndex(0);
String s = cFmt.format(i);
after.append(" ");
after.append(s);
after.append(cFmt.parse(cFmt.format(i), status));
}
// Compare the expected results with the new formatted results
assertEquals(after.toString(), expectedFormattedOutput,
"Mutating array passed to setter changed internals of ChoiceFormat");
}
}