undefect. CWE-407 — 63 sites patched across 27 ecosystems
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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test/jdk/java/util/concurrent/tck/AtomicIntegerTest.java
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test/jdk/java/util/concurrent/tck/AtomicIntegerTest.java
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/*
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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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* This file is available under and governed by the GNU General Public
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* License version 2 only, as published by the Free Software Foundation.
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* However, the following notice accompanied the original version of this
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* file:
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*
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* Written by Doug Lea with assistance from members of JCP JSR-166
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* Expert Group and released to the public domain, as explained at
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* http://creativecommons.org/publicdomain/zero/1.0/
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* Other contributors include Andrew Wright, Jeffrey Hayes,
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* Pat Fisher, Mike Judd.
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*/
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import java.util.concurrent.atomic.AtomicInteger;
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import junit.framework.Test;
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import junit.framework.TestSuite;
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public class AtomicIntegerTest extends JSR166TestCase {
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public static void main(String[] args) {
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main(suite(), args);
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}
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public static Test suite() {
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return new TestSuite(AtomicIntegerTest.class);
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}
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final int[] VALUES = {
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Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
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};
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/**
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* constructor initializes to given value
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*/
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public void testConstructor() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(1, ai.get());
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}
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/**
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* default constructed initializes to zero
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*/
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public void testConstructor2() {
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AtomicInteger ai = new AtomicInteger();
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assertEquals(0, ai.get());
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}
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/**
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* get returns the last value set
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*/
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public void testGetSet() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(1, ai.get());
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ai.set(2);
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assertEquals(2, ai.get());
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ai.set(-3);
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assertEquals(-3, ai.get());
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}
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/**
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* get returns the last value lazySet in same thread
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*/
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public void testGetLazySet() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(1, ai.get());
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ai.lazySet(2);
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assertEquals(2, ai.get());
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ai.lazySet(-3);
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assertEquals(-3, ai.get());
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}
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/**
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* compareAndSet succeeds in changing value if equal to expected else fails
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*/
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public void testCompareAndSet() {
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AtomicInteger ai = new AtomicInteger(1);
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assertTrue(ai.compareAndSet(1, 2));
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assertTrue(ai.compareAndSet(2, -4));
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assertEquals(-4, ai.get());
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assertFalse(ai.compareAndSet(-5, 7));
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assertEquals(-4, ai.get());
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assertTrue(ai.compareAndSet(-4, 7));
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assertEquals(7, ai.get());
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}
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/**
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* compareAndSet in one thread enables another waiting for value
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* to succeed
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*/
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public void testCompareAndSetInMultipleThreads() throws Exception {
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final AtomicInteger ai = new AtomicInteger(1);
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Thread t = new Thread(new CheckedRunnable() {
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public void realRun() {
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while (!ai.compareAndSet(2, 3))
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Thread.yield();
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}});
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t.start();
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assertTrue(ai.compareAndSet(1, 2));
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t.join(LONG_DELAY_MS);
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assertFalse(t.isAlive());
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assertEquals(3, ai.get());
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}
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/**
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* repeated weakCompareAndSet succeeds in changing value when equal
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* to expected
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*/
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@SuppressWarnings("deprecation")
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public void testWeakCompareAndSet() {
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AtomicInteger ai = new AtomicInteger(1);
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do {} while (!ai.weakCompareAndSet(1, 2));
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do {} while (!ai.weakCompareAndSet(2, -4));
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assertEquals(-4, ai.get());
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do {} while (!ai.weakCompareAndSet(-4, 7));
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assertEquals(7, ai.get());
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}
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/**
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* getAndSet returns previous value and sets to given value
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*/
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public void testGetAndSet() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(1, ai.getAndSet(0));
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assertEquals(0, ai.getAndSet(-10));
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assertEquals(-10, ai.getAndSet(1));
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}
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/**
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* getAndAdd returns previous value and adds given value
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*/
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public void testGetAndAdd() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(1, ai.getAndAdd(2));
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assertEquals(3, ai.get());
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assertEquals(3, ai.getAndAdd(-4));
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assertEquals(-1, ai.get());
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}
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/**
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* getAndDecrement returns previous value and decrements
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*/
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public void testGetAndDecrement() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(1, ai.getAndDecrement());
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assertEquals(0, ai.getAndDecrement());
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assertEquals(-1, ai.getAndDecrement());
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}
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/**
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* getAndIncrement returns previous value and increments
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*/
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public void testGetAndIncrement() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(1, ai.getAndIncrement());
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assertEquals(2, ai.get());
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ai.set(-2);
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assertEquals(-2, ai.getAndIncrement());
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assertEquals(-1, ai.getAndIncrement());
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assertEquals(0, ai.getAndIncrement());
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assertEquals(1, ai.get());
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}
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/**
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* addAndGet adds given value to current, and returns current value
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*/
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public void testAddAndGet() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(3, ai.addAndGet(2));
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assertEquals(3, ai.get());
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assertEquals(-1, ai.addAndGet(-4));
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assertEquals(-1, ai.get());
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}
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/**
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* decrementAndGet decrements and returns current value
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*/
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public void testDecrementAndGet() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(0, ai.decrementAndGet());
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assertEquals(-1, ai.decrementAndGet());
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assertEquals(-2, ai.decrementAndGet());
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assertEquals(-2, ai.get());
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}
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/**
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* incrementAndGet increments and returns current value
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*/
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public void testIncrementAndGet() {
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AtomicInteger ai = new AtomicInteger(1);
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assertEquals(2, ai.incrementAndGet());
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assertEquals(2, ai.get());
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ai.set(-2);
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assertEquals(-1, ai.incrementAndGet());
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assertEquals(0, ai.incrementAndGet());
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assertEquals(1, ai.incrementAndGet());
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assertEquals(1, ai.get());
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}
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/**
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* a deserialized/reserialized atomic holds same value
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*/
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public void testSerialization() throws Exception {
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AtomicInteger x = new AtomicInteger();
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AtomicInteger y = serialClone(x);
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assertNotSame(x, y);
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x.set(22);
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AtomicInteger z = serialClone(x);
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assertEquals(22, x.get());
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assertEquals(0, y.get());
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assertEquals(22, z.get());
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}
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/**
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* toString returns current value.
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*/
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public void testToString() {
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AtomicInteger ai = new AtomicInteger();
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assertEquals("0", ai.toString());
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for (int x : VALUES) {
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ai.set(x);
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assertEquals(Integer.toString(x), ai.toString());
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}
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}
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/**
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* intValue returns current value.
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*/
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public void testIntValue() {
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AtomicInteger ai = new AtomicInteger();
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assertEquals(0, ai.intValue());
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for (int x : VALUES) {
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ai.set(x);
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assertEquals(x, ai.intValue());
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}
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}
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/**
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* longValue returns current value.
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*/
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public void testLongValue() {
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AtomicInteger ai = new AtomicInteger();
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assertEquals(0L, ai.longValue());
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for (int x : VALUES) {
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ai.set(x);
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assertEquals((long)x, ai.longValue());
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}
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}
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/**
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* floatValue returns current value.
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*/
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public void testFloatValue() {
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AtomicInteger ai = new AtomicInteger();
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assertEquals(0.0f, ai.floatValue());
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for (int x : VALUES) {
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ai.set(x);
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assertEquals((float)x, ai.floatValue());
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}
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}
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/**
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* doubleValue returns current value.
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*/
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public void testDoubleValue() {
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AtomicInteger ai = new AtomicInteger();
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assertEquals(0.0d, ai.doubleValue());
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for (int x : VALUES) {
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ai.set(x);
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assertEquals((double)x, ai.doubleValue());
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}
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}
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}
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