--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/concurrent/tck/AtomicReferenceTest.java Fri Jan 29 11:44:19 2016 -0800
@@ -0,0 +1,170 @@
+/*
+ * 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.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ * Other contributors include Andrew Wright, Jeffrey Hayes,
+ * Pat Fisher, Mike Judd.
+ */
+
+import java.util.concurrent.atomic.AtomicReference;
+
+import junit.framework.Test;
+import junit.framework.TestSuite;
+
+public class AtomicReferenceTest extends JSR166TestCase {
+ public static void main(String[] args) {
+ main(suite(), args);
+ }
+ public static Test suite() {
+ return new TestSuite(AtomicReferenceTest.class);
+ }
+
+ /**
+ * constructor initializes to given value
+ */
+ public void testConstructor() {
+ AtomicReference ai = new AtomicReference(one);
+ assertSame(one, ai.get());
+ }
+
+ /**
+ * default constructed initializes to null
+ */
+ public void testConstructor2() {
+ AtomicReference ai = new AtomicReference();
+ assertNull(ai.get());
+ }
+
+ /**
+ * get returns the last value set
+ */
+ public void testGetSet() {
+ AtomicReference ai = new AtomicReference(one);
+ assertSame(one, ai.get());
+ ai.set(two);
+ assertSame(two, ai.get());
+ ai.set(m3);
+ assertSame(m3, ai.get());
+ }
+
+ /**
+ * get returns the last value lazySet in same thread
+ */
+ public void testGetLazySet() {
+ AtomicReference ai = new AtomicReference(one);
+ assertSame(one, ai.get());
+ ai.lazySet(two);
+ assertSame(two, ai.get());
+ ai.lazySet(m3);
+ assertSame(m3, ai.get());
+ }
+
+ /**
+ * compareAndSet succeeds in changing value if equal to expected else fails
+ */
+ public void testCompareAndSet() {
+ AtomicReference ai = new AtomicReference(one);
+ assertTrue(ai.compareAndSet(one, two));
+ assertTrue(ai.compareAndSet(two, m4));
+ assertSame(m4, ai.get());
+ assertFalse(ai.compareAndSet(m5, seven));
+ assertSame(m4, ai.get());
+ assertTrue(ai.compareAndSet(m4, seven));
+ assertSame(seven, ai.get());
+ }
+
+ /**
+ * compareAndSet in one thread enables another waiting for value
+ * to succeed
+ */
+ public void testCompareAndSetInMultipleThreads() throws Exception {
+ final AtomicReference ai = new AtomicReference(one);
+ Thread t = new Thread(new CheckedRunnable() {
+ public void realRun() {
+ while (!ai.compareAndSet(two, three))
+ Thread.yield();
+ }});
+
+ t.start();
+ assertTrue(ai.compareAndSet(one, two));
+ t.join(LONG_DELAY_MS);
+ assertFalse(t.isAlive());
+ assertSame(three, ai.get());
+ }
+
+ /**
+ * repeated weakCompareAndSet succeeds in changing value when equal
+ * to expected
+ */
+ public void testWeakCompareAndSet() {
+ AtomicReference ai = new AtomicReference(one);
+ do {} while (!ai.weakCompareAndSet(one, two));
+ do {} while (!ai.weakCompareAndSet(two, m4));
+ assertSame(m4, ai.get());
+ do {} while (!ai.weakCompareAndSet(m4, seven));
+ assertSame(seven, ai.get());
+ }
+
+ /**
+ * getAndSet returns previous value and sets to given value
+ */
+ public void testGetAndSet() {
+ AtomicReference ai = new AtomicReference(one);
+ assertSame(one, ai.getAndSet(zero));
+ assertSame(zero, ai.getAndSet(m10));
+ assertSame(m10, ai.getAndSet(one));
+ }
+
+ /**
+ * a deserialized serialized atomic holds same value
+ */
+ public void testSerialization() throws Exception {
+ AtomicReference x = new AtomicReference();
+ AtomicReference y = serialClone(x);
+ assertNotSame(x, y);
+ x.set(one);
+ AtomicReference z = serialClone(x);
+ assertNotSame(y, z);
+ assertEquals(one, x.get());
+ assertEquals(null, y.get());
+ assertEquals(one, z.get());
+ }
+
+ /**
+ * toString returns current value.
+ */
+ public void testToString() {
+ AtomicReference<Integer> ai = new AtomicReference<Integer>(one);
+ assertEquals(one.toString(), ai.toString());
+ ai.set(two);
+ assertEquals(two.toString(), ai.toString());
+ }
+
+}