--- jsr166/src/test/tck/AtomicLongArrayTest.java 2009/11/02 20:28:31 1.10 +++ jsr166/src/test/tck/AtomicLongArrayTest.java 2013/05/30 03:28:55 1.26 @@ -1,19 +1,18 @@ /* * 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/licenses/publicdomain + * http://creativecommons.org/publicdomain/zero/1.0/ * Other contributors include Andrew Wright, Jeffrey Hayes, * Pat Fisher, Mike Judd. */ import junit.framework.*; -import java.util.concurrent.atomic.*; -import java.io.*; -import java.util.*; +import java.util.Arrays; +import java.util.concurrent.atomic.AtomicLongArray; public class AtomicLongArrayTest extends JSR166TestCase { - public static void main (String[] args) { - junit.textui.TestRunner.run (suite()); + public static void main(String[] args) { + junit.textui.TestRunner.run(suite()); } public static Test suite() { return new TestSuite(AtomicLongArrayTest.class); @@ -22,10 +21,10 @@ public class AtomicLongArrayTest extends /** * constructor creates array of given size with all elements zero */ - public void testConstructor(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) - assertEquals(0,ai.get(i)); + public void testConstructor() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) + assertEquals(0, aa.get(i)); } /** @@ -34,91 +33,103 @@ public class AtomicLongArrayTest extends public void testConstructor2NPE() { try { long[] a = null; - AtomicLongArray ai = new AtomicLongArray(a); - } catch (NullPointerException success) { - } catch (Exception ex) { - unexpectedException(); - } + AtomicLongArray aa = new AtomicLongArray(a); + shouldThrow(); + } catch (NullPointerException success) {} } /** * constructor with array is of same size and has all elements */ public void testConstructor2() { - long[] a = { 17L, 3L, -42L, 99L, -7L}; - AtomicLongArray ai = new AtomicLongArray(a); - assertEquals(a.length, ai.length()); - for (int i = 0; i < a.length; ++i) - assertEquals(a[i], ai.get(i)); + long[] a = { 17L, 3L, -42L, 99L, -7L }; + AtomicLongArray aa = new AtomicLongArray(a); + assertEquals(a.length, aa.length()); + for (int i = 0; i < a.length; i++) + assertEquals(a[i], aa.get(i)); } /** * get and set for out of bound indices throw IndexOutOfBoundsException */ - public void testIndexing(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - try { - ai.get(SIZE); - } catch(IndexOutOfBoundsException success){ - } - try { - ai.get(-1); - } catch(IndexOutOfBoundsException success){ - } - try { - ai.set(SIZE, 0); - } catch(IndexOutOfBoundsException success){ - } - try { - ai.set(-1, 0); - } catch(IndexOutOfBoundsException success){ + public void testIndexing() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int index : new int[] { -1, SIZE }) { + try { + aa.get(index); + shouldThrow(); + } catch (IndexOutOfBoundsException success) {} + try { + aa.set(index, 1); + shouldThrow(); + } catch (IndexOutOfBoundsException success) {} + try { + aa.lazySet(index, 1); + shouldThrow(); + } catch (IndexOutOfBoundsException success) {} + try { + aa.compareAndSet(index, 1, 2); + shouldThrow(); + } catch (IndexOutOfBoundsException success) {} + try { + aa.weakCompareAndSet(index, 1, 2); + shouldThrow(); + } catch (IndexOutOfBoundsException success) {} + try { + aa.getAndAdd(index, 1); + shouldThrow(); + } catch (IndexOutOfBoundsException success) {} + try { + aa.addAndGet(index, 1); + shouldThrow(); + } catch (IndexOutOfBoundsException success) {} } } /** * get returns the last value set at index */ - public void testGetSet(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertEquals(1,ai.get(i)); - ai.set(i, 2); - assertEquals(2,ai.get(i)); - ai.set(i, -3); - assertEquals(-3,ai.get(i)); + public void testGetSet() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertEquals(1, aa.get(i)); + aa.set(i, 2); + assertEquals(2, aa.get(i)); + aa.set(i, -3); + assertEquals(-3, aa.get(i)); } } /** * get returns the last value lazySet at index by same thread */ - public void testGetLazySet(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.lazySet(i, 1); - assertEquals(1,ai.get(i)); - ai.lazySet(i, 2); - assertEquals(2,ai.get(i)); - ai.lazySet(i, -3); - assertEquals(-3,ai.get(i)); + public void testGetLazySet() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.lazySet(i, 1); + assertEquals(1, aa.get(i)); + aa.lazySet(i, 2); + assertEquals(2, aa.get(i)); + aa.lazySet(i, -3); + assertEquals(-3, aa.get(i)); } } /** * compareAndSet succeeds in changing value if equal to expected else fails */ - public void testCompareAndSet(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertTrue(ai.compareAndSet(i, 1,2)); - assertTrue(ai.compareAndSet(i, 2,-4)); - assertEquals(-4,ai.get(i)); - assertFalse(ai.compareAndSet(i, -5,7)); - assertFalse((7 == ai.get(i))); - assertTrue(ai.compareAndSet(i, -4,7)); - assertEquals(7,ai.get(i)); + public void testCompareAndSet() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertTrue(aa.compareAndSet(i, 1, 2)); + assertTrue(aa.compareAndSet(i, 2, -4)); + assertEquals(-4, aa.get(i)); + assertFalse(aa.compareAndSet(i, -5, 7)); + assertEquals(-4, aa.get(i)); + assertTrue(aa.compareAndSet(i, -4, 7)); + assertEquals(7, aa.get(i)); } } @@ -126,123 +137,120 @@ public class AtomicLongArrayTest extends * compareAndSet in one thread enables another waiting for value * to succeed */ - public void testCompareAndSetInMultipleThreads() { + public void testCompareAndSetInMultipleThreads() throws InterruptedException { final AtomicLongArray a = new AtomicLongArray(1); a.set(0, 1); - Thread t = new Thread(new Runnable() { - public void run() { - while(!a.compareAndSet(0, 2, 3)) Thread.yield(); - }}); - try { - t.start(); - assertTrue(a.compareAndSet(0, 1, 2)); - t.join(LONG_DELAY_MS); - assertFalse(t.isAlive()); - assertEquals(a.get(0), 3); - } - catch(Exception e) { - unexpectedException(); - } + Thread t = new Thread(new CheckedRunnable() { + public void realRun() { + while (!a.compareAndSet(0, 2, 3)) + Thread.yield(); + }}); + + t.start(); + assertTrue(a.compareAndSet(0, 1, 2)); + t.join(LONG_DELAY_MS); + assertFalse(t.isAlive()); + assertEquals(3, a.get(0)); } /** * repeated weakCompareAndSet succeeds in changing value when equal * to expected */ - public void testWeakCompareAndSet(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - while(!ai.weakCompareAndSet(i, 1,2)); - while(!ai.weakCompareAndSet(i, 2,-4)); - assertEquals(-4,ai.get(i)); - while(!ai.weakCompareAndSet(i, -4,7)); - assertEquals(7,ai.get(i)); + public void testWeakCompareAndSet() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + while (!aa.weakCompareAndSet(i, 1, 2)); + while (!aa.weakCompareAndSet(i, 2, -4)); + assertEquals(-4, aa.get(i)); + while (!aa.weakCompareAndSet(i, -4, 7)); + assertEquals(7, aa.get(i)); } } /** - * getAndSet returns previous value and sets to given value at given index + * getAndSet returns previous value and sets to given value at given index */ - public void testGetAndSet(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertEquals(1,ai.getAndSet(i,0)); - assertEquals(0,ai.getAndSet(i,-10)); - assertEquals(-10,ai.getAndSet(i,1)); + public void testGetAndSet() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertEquals(1, aa.getAndSet(i, 0)); + assertEquals(0, aa.getAndSet(i, -10)); + assertEquals(-10, aa.getAndSet(i, 1)); } } /** - * getAndAdd returns previous value and adds given value + * getAndAdd returns previous value and adds given value */ - public void testGetAndAdd(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertEquals(1,ai.getAndAdd(i,2)); - assertEquals(3,ai.get(i)); - assertEquals(3,ai.getAndAdd(i,-4)); - assertEquals(-1,ai.get(i)); + public void testGetAndAdd() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertEquals(1, aa.getAndAdd(i, 2)); + assertEquals(3, aa.get(i)); + assertEquals(3, aa.getAndAdd(i, -4)); + assertEquals(-1, aa.get(i)); } } /** * getAndDecrement returns previous value and decrements */ - public void testGetAndDecrement(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertEquals(1,ai.getAndDecrement(i)); - assertEquals(0,ai.getAndDecrement(i)); - assertEquals(-1,ai.getAndDecrement(i)); + public void testGetAndDecrement() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertEquals(1, aa.getAndDecrement(i)); + assertEquals(0, aa.getAndDecrement(i)); + assertEquals(-1, aa.getAndDecrement(i)); } } /** * getAndIncrement returns previous value and increments */ - public void testGetAndIncrement(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertEquals(1,ai.getAndIncrement(i)); - assertEquals(2,ai.get(i)); - ai.set(i,-2); - assertEquals(-2,ai.getAndIncrement(i)); - assertEquals(-1,ai.getAndIncrement(i)); - assertEquals(0,ai.getAndIncrement(i)); - assertEquals(1,ai.get(i)); + public void testGetAndIncrement() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertEquals(1, aa.getAndIncrement(i)); + assertEquals(2, aa.get(i)); + aa.set(i, -2); + assertEquals(-2, aa.getAndIncrement(i)); + assertEquals(-1, aa.getAndIncrement(i)); + assertEquals(0, aa.getAndIncrement(i)); + assertEquals(1, aa.get(i)); } } /** - * addAndGet adds given value to current, and returns current value + * addAndGet adds given value to current, and returns current value */ public void testAddAndGet() { - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertEquals(3,ai.addAndGet(i,2)); - assertEquals(3,ai.get(i)); - assertEquals(-1,ai.addAndGet(i,-4)); - assertEquals(-1,ai.get(i)); + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertEquals(3, aa.addAndGet(i, 2)); + assertEquals(3, aa.get(i)); + assertEquals(-1, aa.addAndGet(i, -4)); + assertEquals(-1, aa.get(i)); } } /** * decrementAndGet decrements and returns current value */ - public void testDecrementAndGet(){ - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertEquals(0,ai.decrementAndGet(i)); - assertEquals(-1,ai.decrementAndGet(i)); - assertEquals(-2,ai.decrementAndGet(i)); - assertEquals(-2,ai.get(i)); + public void testDecrementAndGet() { + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertEquals(0, aa.decrementAndGet(i)); + assertEquals(-1, aa.decrementAndGet(i)); + assertEquals(-2, aa.decrementAndGet(i)); + assertEquals(-2, aa.get(i)); } } @@ -250,34 +258,34 @@ public class AtomicLongArrayTest extends * incrementAndGet increments and returns current value */ public void testIncrementAndGet() { - AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) { - ai.set(i, 1); - assertEquals(2,ai.incrementAndGet(i)); - assertEquals(2,ai.get(i)); - ai.set(i, -2); - assertEquals(-1,ai.incrementAndGet(i)); - assertEquals(0,ai.incrementAndGet(i)); - assertEquals(1,ai.incrementAndGet(i)); - assertEquals(1,ai.get(i)); + AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) { + aa.set(i, 1); + assertEquals(2, aa.incrementAndGet(i)); + assertEquals(2, aa.get(i)); + aa.set(i, -2); + assertEquals(-1, aa.incrementAndGet(i)); + assertEquals(0, aa.incrementAndGet(i)); + assertEquals(1, aa.incrementAndGet(i)); + assertEquals(1, aa.get(i)); } } static final long COUNTDOWN = 100000; - class Counter implements Runnable { - final AtomicLongArray ai; + class Counter extends CheckedRunnable { + final AtomicLongArray aa; volatile long counts; - Counter(AtomicLongArray a) { ai = a; } - public void run() { + Counter(AtomicLongArray a) { aa = a; } + public void realRun() { for (;;) { boolean done = true; - for (int i = 0; i < ai.length(); ++i) { - long v = ai.get(i); - threadAssertTrue(v >= 0); + for (int i = 0; i < aa.length(); i++) { + long v = aa.get(i); + assertTrue(v >= 0); if (v != 0) { done = false; - if (ai.compareAndSet(i, v, v-1)) + if (aa.compareAndSet(i, v, v-1)) ++counts; } } @@ -291,48 +299,33 @@ public class AtomicLongArrayTest extends * Multiple threads using same array of counters successfully * update a number of times equal to total count */ - public void testCountingInMultipleThreads() { - try { - final AtomicLongArray ai = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) - ai.set(i, COUNTDOWN); - Counter c1 = new Counter(ai); - Counter c2 = new Counter(ai); - Thread t1 = new Thread(c1); - Thread t2 = new Thread(c2); - t1.start(); - t2.start(); - t1.join(); - t2.join(); - assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN); - } - catch(InterruptedException ie) { - unexpectedException(); - } + public void testCountingInMultipleThreads() throws InterruptedException { + final AtomicLongArray aa = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) + aa.set(i, COUNTDOWN); + Counter c1 = new Counter(aa); + Counter c2 = new Counter(aa); + Thread t1 = new Thread(c1); + Thread t2 = new Thread(c2); + t1.start(); + t2.start(); + t1.join(); + t2.join(); + assertEquals(c1.counts+c2.counts, SIZE * COUNTDOWN); } /** * a deserialized serialized array holds same values */ - public void testSerialization() { - AtomicLongArray l = new AtomicLongArray(SIZE); - for (int i = 0; i < SIZE; ++i) - l.set(i, -i); - - try { - ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); - ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); - out.writeObject(l); - out.close(); - - ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); - ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); - AtomicLongArray r = (AtomicLongArray) in.readObject(); - for (int i = 0; i < SIZE; ++i) { - assertEquals(l.get(i), r.get(i)); - } - } catch(Exception e){ - unexpectedException(); + public void testSerialization() throws Exception { + AtomicLongArray x = new AtomicLongArray(SIZE); + for (int i = 0; i < SIZE; i++) + x.set(i, -i); + AtomicLongArray 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)); } } @@ -340,10 +333,9 @@ public class AtomicLongArrayTest extends * toString returns current value. */ public void testToString() { - long[] a = { 17, 3, -42, 99, -7}; - AtomicLongArray ai = new AtomicLongArray(a); - assertEquals(Arrays.toString(a), ai.toString()); + long[] a = { 17, 3, -42, 99, -7 }; + AtomicLongArray aa = new AtomicLongArray(a); + assertEquals(Arrays.toString(a), aa.toString()); } - }