1 files changed, 213 insertions, 0 deletions
diff --git a/jsr166-tests/src/test/java/jsr166/AtomicReferenceArrayTest.java b/jsr166-tests/src/test/java/jsr166/AtomicReferenceArrayTest.java
new file mode 100644
index 0000000..0a4f3d9
--- /dev/null
+++ b/jsr166-tests/src/test/java/jsr166/AtomicReferenceArrayTest.java
@@ -0,0 +1,213 @@
+/*
+ * 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.Arrays;
+import java.util.concurrent.atomic.AtomicReferenceArray;
+
+public class AtomicReferenceArrayTest extends JSR166TestCase {
+
+    /**
+     * constructor creates array of given size with all elements null
+     */
+    public void testConstructor() {
+        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
+        for (int i = 0; i < SIZE; i++) {
+            assertNull(aa.get(i));
+        }
+    }
+
+    /**
+     * constructor with null array throws NPE
+     */
+    public void testConstructor2NPE() {
+        try {
+            Integer[] a = null;
+            AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * constructor with array is of same size and has all elements
+     */
+    public void testConstructor2() {
+        Integer[] a = { two, one, three, four, seven };
+        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
+        assertEquals(a.length, aa.length());
+        for (int i = 0; i < a.length; i++)
+            assertEquals(a[i], aa.get(i));
+    }
+
+    /**
+     * Initialize AtomicReferenceArray<Class> with SubClass[]
+     */
+    public void testConstructorSubClassArray() {
+        Integer[] a = { two, one, three, four, seven };
+        AtomicReferenceArray<Number> aa = new AtomicReferenceArray<Number>(a);
+        assertEquals(a.length, aa.length());
+        for (int i = 0; i < a.length; i++) {
+            assertSame(a[i], aa.get(i));
+            Long x = Long.valueOf(i);
+            aa.set(i, x);
+            assertSame(x, aa.get(i));
+        }
+    }
+
+    /**
+     * get and set for out of bound indices throw IndexOutOfBoundsException
+     */
+    public void testIndexing() {
+        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
+        for (int index : new int[] { -1, SIZE }) {
+            try {
+                aa.get(index);
+                shouldThrow();
+            } catch (IndexOutOfBoundsException success) {}
+            try {
+                aa.set(index, null);
+                shouldThrow();
+            } catch (IndexOutOfBoundsException success) {}
+            try {
+                aa.lazySet(index, null);
+                shouldThrow();
+            } catch (IndexOutOfBoundsException success) {}
+            try {
+                aa.compareAndSet(index, null, null);
+                shouldThrow();
+            } catch (IndexOutOfBoundsException success) {}
+            try {
+                aa.weakCompareAndSet(index, null, null);
+                shouldThrow();
+            } catch (IndexOutOfBoundsException success) {}
+        }
+    }
+
+    /**
+     * get returns the last value set at index
+     */
+    public void testGetSet() {
+        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
+        for (int i = 0; i < SIZE; i++) {
+            aa.set(i, one);
+            assertSame(one, aa.get(i));
+            aa.set(i, two);
+            assertSame(two, aa.get(i));
+            aa.set(i, m3);
+            assertSame(m3, aa.get(i));
+        }
+    }
+
+    /**
+     * get returns the last value lazySet at index by same thread
+     */
+    public void testGetLazySet() {
+        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
+        for (int i = 0; i < SIZE; i++) {
+            aa.lazySet(i, one);
+            assertSame(one, aa.get(i));
+            aa.lazySet(i, two);
+            assertSame(two, aa.get(i));
+            aa.lazySet(i, m3);
+            assertSame(m3, aa.get(i));
+        }
+    }
+
+    /**
+     * compareAndSet succeeds in changing value if equal to expected else fails
+     */
+    public void testCompareAndSet() {
+        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
+        for (int i = 0; i < SIZE; i++) {
+            aa.set(i, one);
+            assertTrue(aa.compareAndSet(i, one, two));
+            assertTrue(aa.compareAndSet(i, two, m4));
+            assertSame(m4, aa.get(i));
+            assertFalse(aa.compareAndSet(i, m5, seven));
+            assertSame(m4, aa.get(i));
+            assertTrue(aa.compareAndSet(i, m4, seven));
+            assertSame(seven, aa.get(i));
+        }
+    }
+
+    /**
+     * compareAndSet in one thread enables another waiting for value
+     * to succeed
+     */
+    public void testCompareAndSetInMultipleThreads() throws InterruptedException {
+        final AtomicReferenceArray a = new AtomicReferenceArray(1);
+        a.set(0, one);
+        Thread t = new Thread(new CheckedRunnable() {
+            public void realRun() {
+                while (!a.compareAndSet(0, two, three))
+                    Thread.yield();
+            }});
+
+        t.start();
+        assertTrue(a.compareAndSet(0, one, two));
+        t.join(LONG_DELAY_MS);
+        assertFalse(t.isAlive());
+        assertSame(three, a.get(0));
+    }
+
+    /**
+     * repeated weakCompareAndSet succeeds in changing value when equal
+     * to expected
+     */
+    public void testWeakCompareAndSet() {
+        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
+        for (int i = 0; i < SIZE; i++) {
+            aa.set(i, one);
+            while (!aa.weakCompareAndSet(i, one, two));
+            while (!aa.weakCompareAndSet(i, two, m4));
+            assertSame(m4, aa.get(i));
+            while (!aa.weakCompareAndSet(i, m4, seven));
+            assertSame(seven, aa.get(i));
+        }
+    }
+
+    /**
+     * getAndSet returns previous value and sets to given value at given index
+     */
+    public void testGetAndSet() {
+        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
+        for (int i = 0; i < SIZE; i++) {
+            aa.set(i, one);
+            assertSame(one, aa.getAndSet(i, zero));
+            assertSame(zero, aa.getAndSet(i, m10));
+            assertSame(m10, aa.getAndSet(i, one));
+        }
+    }
+
+    /**
+     * a deserialized serialized array holds same values
+     */
+    public void testSerialization() throws Exception {
+        AtomicReferenceArray x = new AtomicReferenceArray(SIZE);
+        for (int i = 0; i < SIZE; i++) {
+            x.set(i, new Integer(-i));
+        }
+        AtomicReferenceArray y = serialClone(x);
+        assertNotSame(x, y);
+        assertEquals(x.length(), y.length());
+        for (int i = 0; i < SIZE; i++) {
+            assertEquals(x.get(i), y.get(i));
+        }
+    }
+
+    /**
+     * toString returns current value.
+     */
+    public void testToString() {
+        Integer[] a = { two, one, three, four, seven };
+        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
+        assertEquals(Arrays.toString(a), aa.toString());
+    }
+}