Added jsr166 tck tests as part of the libcore testsuite.

Change-Id: I6094d734f818fa043f2b277cf2b4ec7fec68e26e

1 files changed, 137 insertions, 0 deletions

diff --git a/jsr166-tests/src/test/java/jsr166/AtomicReferenceTest.java b/jsr166-tests/src/test/java/jsr166/AtomicReferenceTest.java
new file mode 100644
index 0000000..8032546
--- /dev/null
+++ b/jsr166-tests/src/test/java/jsr166/AtomicReferenceTest.java
@@ -0,0 +1,137 @@
+/*
+ * 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.AtomicReference;
+
+public class AtomicReferenceTest extends JSR166TestCase {
+
+    /**
+     * 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);
+        while (!ai.weakCompareAndSet(one, two));
+        while (!ai.weakCompareAndSet(two, m4));
+        assertSame(m4, ai.get());
+        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());
+    }
+
+}