--- jsr166/src/test/tck/AtomicIntegerTest.java 2009/11/16 05:30:07 1.14 +++ jsr166/src/test/tck/AtomicIntegerTest.java 2017/08/04 03:30:21 1.32 @@ -1,29 +1,34 @@ /* * 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.concurrent.atomic.AtomicInteger; + +import junit.framework.Test; +import junit.framework.TestSuite; public class AtomicIntegerTest extends JSR166TestCase { - public static void main (String[] args) { - junit.textui.TestRunner.run (suite()); + public static void main(String[] args) { + main(suite(), args); } public static Test suite() { return new TestSuite(AtomicIntegerTest.class); } + 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()); + assertEquals(1, ai.get()); } /** @@ -31,7 +36,7 @@ public class AtomicIntegerTest extends J */ public void testConstructor2() { AtomicInteger ai = new AtomicInteger(); - assertEquals(0,ai.get()); + assertEquals(0, ai.get()); } /** @@ -39,12 +44,11 @@ public class AtomicIntegerTest extends J */ 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()); - + assertEquals(1, ai.get()); + ai.set(2); + assertEquals(2, ai.get()); + ai.set(-3); + assertEquals(-3, ai.get()); } /** @@ -52,47 +56,44 @@ public class AtomicIntegerTest extends J */ 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()); - + 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)); - assertFalse((7 == ai.get())); - assertTrue(ai.compareAndSet(-4,7)); - assertEquals(7,ai.get()); + 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() { + public void testCompareAndSetInMultipleThreads() throws Exception { final AtomicInteger ai = new AtomicInteger(1); - Thread t = new Thread(new Runnable() { - public void run() { - while (!ai.compareAndSet(2, 3)) Thread.yield(); - }}); - try { - t.start(); - assertTrue(ai.compareAndSet(1, 2)); - t.join(LONG_DELAY_MS); - assertFalse(t.isAlive()); - assertEquals(ai.get(), 3); - } - catch (Exception e) { - unexpectedException(); - } + 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()); } /** @@ -101,11 +102,11 @@ public class AtomicIntegerTest extends J */ 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()); + do {} while (!ai.weakCompareAndSet(1, 2)); + do {} while (!ai.weakCompareAndSet(2, -4)); + assertEquals(-4, ai.get()); + do {} while (!ai.weakCompareAndSet(-4, 7)); + assertEquals(7, ai.get()); } /** @@ -113,9 +114,9 @@ public class AtomicIntegerTest extends J */ public void testGetAndSet() { AtomicInteger ai = new AtomicInteger(1); - assertEquals(1,ai.getAndSet(0)); - assertEquals(0,ai.getAndSet(-10)); - assertEquals(-10,ai.getAndSet(1)); + assertEquals(1, ai.getAndSet(0)); + assertEquals(0, ai.getAndSet(-10)); + assertEquals(-10, ai.getAndSet(1)); } /** @@ -123,10 +124,10 @@ public class AtomicIntegerTest extends J */ 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()); + assertEquals(1, ai.getAndAdd(2)); + assertEquals(3, ai.get()); + assertEquals(3, ai.getAndAdd(-4)); + assertEquals(-1, ai.get()); } /** @@ -134,9 +135,9 @@ public class AtomicIntegerTest extends J */ public void testGetAndDecrement() { AtomicInteger ai = new AtomicInteger(1); - assertEquals(1,ai.getAndDecrement()); - assertEquals(0,ai.getAndDecrement()); - assertEquals(-1,ai.getAndDecrement()); + assertEquals(1, ai.getAndDecrement()); + assertEquals(0, ai.getAndDecrement()); + assertEquals(-1, ai.getAndDecrement()); } /** @@ -144,13 +145,13 @@ public class AtomicIntegerTest extends J */ 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()); + 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()); } /** @@ -158,10 +159,10 @@ public class AtomicIntegerTest extends J */ 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()); + assertEquals(3, ai.addAndGet(2)); + assertEquals(3, ai.get()); + assertEquals(-1, ai.addAndGet(-4)); + assertEquals(-1, ai.get()); } /** @@ -169,10 +170,10 @@ public class AtomicIntegerTest extends J */ public void testDecrementAndGet() { AtomicInteger ai = new AtomicInteger(1); - assertEquals(0,ai.decrementAndGet()); - assertEquals(-1,ai.decrementAndGet()); - assertEquals(-2,ai.decrementAndGet()); - assertEquals(-2,ai.get()); + assertEquals(0, ai.decrementAndGet()); + assertEquals(-1, ai.decrementAndGet()); + assertEquals(-2, ai.decrementAndGet()); + assertEquals(-2, ai.get()); } /** @@ -180,35 +181,27 @@ public class AtomicIntegerTest extends J */ 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()); + 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() { - AtomicInteger l = new AtomicInteger(); - - try { - l.set(22); - 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)); - AtomicInteger r = (AtomicInteger) in.readObject(); - assertEquals(l.get(), r.get()); - } catch (Exception e) { - unexpectedException(); - } + * a deserialized/reserialized 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()); } /** @@ -216,9 +209,10 @@ public class AtomicIntegerTest extends J */ public void testToString() { AtomicInteger ai = new AtomicInteger(); - for (int i = -12; i < 6; ++i) { - ai.set(i); - assertEquals(ai.toString(), Integer.toString(i)); + assertEquals("0", ai.toString()); + for (int x : VALUES) { + ai.set(x); + assertEquals(Integer.toString(x), ai.toString()); } } @@ -227,21 +221,22 @@ public class AtomicIntegerTest extends J */ public void testIntValue() { AtomicInteger ai = new AtomicInteger(); - for (int i = -12; i < 6; ++i) { - ai.set(i); - assertEquals(i, ai.intValue()); + 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(); - for (int i = -12; i < 6; ++i) { - ai.set(i); - assertEquals((long)i, ai.longValue()); + assertEquals(0L, ai.longValue()); + for (int x : VALUES) { + ai.set(x); + assertEquals((long)x, ai.longValue()); } } @@ -250,9 +245,10 @@ public class AtomicIntegerTest extends J */ public void testFloatValue() { AtomicInteger ai = new AtomicInteger(); - for (int i = -12; i < 6; ++i) { - ai.set(i); - assertEquals((float)i, ai.floatValue()); + assertEquals(0.0f, ai.floatValue()); + for (int x : VALUES) { + ai.set(x); + assertEquals((float)x, ai.floatValue()); } } @@ -261,12 +257,11 @@ public class AtomicIntegerTest extends J */ public void testDoubleValue() { AtomicInteger ai = new AtomicInteger(); - for (int i = -12; i < 6; ++i) { - ai.set(i); - assertEquals((double)i, ai.doubleValue()); + assertEquals(0.0d, ai.doubleValue()); + for (int x : VALUES) { + ai.set(x); + assertEquals((double)x, ai.doubleValue()); } } - - }