Added jsr166 tck tests as part of the libcore testsuite.
Change-Id: I6094d734f818fa043f2b277cf2b4ec7fec68e26e
diff --git a/jsr166-tests/src/test/java/jsr166/AtomicIntegerTest.java b/jsr166-tests/src/test/java/jsr166/AtomicIntegerTest.java
new file mode 100644
index 0000000..2afaa73
--- /dev/null
+++ b/jsr166-tests/src/test/java/jsr166/AtomicIntegerTest.java
@@ -0,0 +1,261 @@
+/*
+ * 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.
+ */
+
+package jsr166;
+
+import junit.framework.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class AtomicIntegerTest extends JSR166TestCase {
+
+ final int[] VALUES = {
+ Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
+ };
+
+ /**
+ * constructor initializes to given value
+ */
+ public void testConstructor() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(1, ai.get());
+ }
+
+ /**
+ * default constructed initializes to zero
+ */
+ public void testConstructor2() {
+ AtomicInteger ai = new AtomicInteger();
+ assertEquals(0, ai.get());
+ }
+
+ /**
+ * get returns the last value set
+ */
+ public void testGetSet() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(1, ai.get());
+ ai.set(2);
+ assertEquals(2, ai.get());
+ ai.set(-3);
+ assertEquals(-3, ai.get());
+ }
+
+ /**
+ * get returns the last value lazySet in same thread
+ */
+ public void testGetLazySet() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(1, ai.get());
+ ai.lazySet(2);
+ assertEquals(2, ai.get());
+ ai.lazySet(-3);
+ assertEquals(-3, ai.get());
+ }
+
+ /**
+ * compareAndSet succeeds in changing value if equal to expected else fails
+ */
+ public void testCompareAndSet() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertTrue(ai.compareAndSet(1, 2));
+ assertTrue(ai.compareAndSet(2, -4));
+ assertEquals(-4, ai.get());
+ assertFalse(ai.compareAndSet(-5, 7));
+ assertEquals(-4, ai.get());
+ assertTrue(ai.compareAndSet(-4, 7));
+ assertEquals(7, ai.get());
+ }
+
+ /**
+ * compareAndSet in one thread enables another waiting for value
+ * to succeed
+ */
+ public void testCompareAndSetInMultipleThreads() throws Exception {
+ final AtomicInteger ai = new AtomicInteger(1);
+ Thread t = new Thread(new CheckedRunnable() {
+ public void realRun() {
+ while (!ai.compareAndSet(2, 3))
+ Thread.yield();
+ }});
+
+ t.start();
+ assertTrue(ai.compareAndSet(1, 2));
+ t.join(LONG_DELAY_MS);
+ assertFalse(t.isAlive());
+ assertEquals(3, ai.get());
+ }
+
+ /**
+ * repeated weakCompareAndSet succeeds in changing value when equal
+ * to expected
+ */
+ public void testWeakCompareAndSet() {
+ AtomicInteger ai = new AtomicInteger(1);
+ while (!ai.weakCompareAndSet(1, 2));
+ while (!ai.weakCompareAndSet(2, -4));
+ assertEquals(-4, ai.get());
+ while (!ai.weakCompareAndSet(-4, 7));
+ assertEquals(7, ai.get());
+ }
+
+ /**
+ * getAndSet returns previous value and sets to given value
+ */
+ public void testGetAndSet() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(1, ai.getAndSet(0));
+ assertEquals(0, ai.getAndSet(-10));
+ assertEquals(-10, ai.getAndSet(1));
+ }
+
+ /**
+ * getAndAdd returns previous value and adds given value
+ */
+ public void testGetAndAdd() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(1, ai.getAndAdd(2));
+ assertEquals(3, ai.get());
+ assertEquals(3, ai.getAndAdd(-4));
+ assertEquals(-1, ai.get());
+ }
+
+ /**
+ * getAndDecrement returns previous value and decrements
+ */
+ public void testGetAndDecrement() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(1, ai.getAndDecrement());
+ assertEquals(0, ai.getAndDecrement());
+ assertEquals(-1, ai.getAndDecrement());
+ }
+
+ /**
+ * getAndIncrement returns previous value and increments
+ */
+ public void testGetAndIncrement() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(1, ai.getAndIncrement());
+ assertEquals(2, ai.get());
+ ai.set(-2);
+ assertEquals(-2, ai.getAndIncrement());
+ assertEquals(-1, ai.getAndIncrement());
+ assertEquals(0, ai.getAndIncrement());
+ assertEquals(1, ai.get());
+ }
+
+ /**
+ * addAndGet adds given value to current, and returns current value
+ */
+ public void testAddAndGet() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(3, ai.addAndGet(2));
+ assertEquals(3, ai.get());
+ assertEquals(-1, ai.addAndGet(-4));
+ assertEquals(-1, ai.get());
+ }
+
+ /**
+ * decrementAndGet decrements and returns current value
+ */
+ public void testDecrementAndGet() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(0, ai.decrementAndGet());
+ assertEquals(-1, ai.decrementAndGet());
+ assertEquals(-2, ai.decrementAndGet());
+ assertEquals(-2, ai.get());
+ }
+
+ /**
+ * incrementAndGet increments and returns current value
+ */
+ public void testIncrementAndGet() {
+ AtomicInteger ai = new AtomicInteger(1);
+ assertEquals(2, ai.incrementAndGet());
+ assertEquals(2, ai.get());
+ ai.set(-2);
+ assertEquals(-1, ai.incrementAndGet());
+ assertEquals(0, ai.incrementAndGet());
+ assertEquals(1, ai.incrementAndGet());
+ assertEquals(1, ai.get());
+ }
+
+ /**
+ * a deserialized serialized atomic holds same value
+ */
+ public void testSerialization() throws Exception {
+ AtomicInteger x = new AtomicInteger();
+ AtomicInteger y = serialClone(x);
+ assertNotSame(x, y);
+ x.set(22);
+ AtomicInteger z = serialClone(x);
+ assertEquals(22, x.get());
+ assertEquals(0, y.get());
+ assertEquals(22, z.get());
+ }
+
+ /**
+ * toString returns current value.
+ */
+ public void testToString() {
+ AtomicInteger ai = new AtomicInteger();
+ assertEquals("0", ai.toString());
+ for (int x : VALUES) {
+ ai.set(x);
+ assertEquals(Integer.toString(x), ai.toString());
+ }
+ }
+
+ /**
+ * intValue returns current value.
+ */
+ public void testIntValue() {
+ AtomicInteger ai = new AtomicInteger();
+ assertEquals(0, ai.intValue());
+ for (int x : VALUES) {
+ ai.set(x);
+ assertEquals(x, ai.intValue());
+ }
+ }
+
+ /**
+ * longValue returns current value.
+ */
+ public void testLongValue() {
+ AtomicInteger ai = new AtomicInteger();
+ assertEquals(0L, ai.longValue());
+ for (int x : VALUES) {
+ ai.set(x);
+ assertEquals((long)x, ai.longValue());
+ }
+ }
+
+ /**
+ * floatValue returns current value.
+ */
+ public void testFloatValue() {
+ AtomicInteger ai = new AtomicInteger();
+ assertEquals(0.0f, ai.floatValue());
+ for (int x : VALUES) {
+ ai.set(x);
+ assertEquals((float)x, ai.floatValue());
+ }
+ }
+
+ /**
+ * doubleValue returns current value.
+ */
+ public void testDoubleValue() {
+ AtomicInteger ai = new AtomicInteger();
+ assertEquals(0.0d, ai.doubleValue());
+ for (int x : VALUES) {
+ ai.set(x);
+ assertEquals((double)x, ai.doubleValue());
+ }
+ }
+
+}