test/jdk/java/util/concurrent/tck/AtomicLongTest.java - platform/libcore - Git at Google

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 /*
  * This file is available under and governed by the GNU General Public
  * License version 2 only, as published by the Free Software Foundation.
  * However, the following notice accompanied the original version of this
  * file:
  *
  * 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.
  */

 import java.util.concurrent.atomic.AtomicLong;

 import junit.framework.Test;
 import junit.framework.TestSuite;

 public class AtomicLongTest extends JSR166TestCase {
     public static void main(String[] args) {
         main(suite(), args);
     }
     public static Test suite() {
         return new TestSuite(AtomicLongTest.class);
     }

     final long[] VALUES = {
         Long.MIN_VALUE,
         Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
         Long.MAX_VALUE,
     };

     /**
      * constructor initializes to given value
      */
     public void testConstructor() {
         AtomicLong ai = new AtomicLong(1);
         assertEquals(1, ai.get());
     }

     /**
      * default constructed initializes to zero
      */
     public void testConstructor2() {
         AtomicLong ai = new AtomicLong();
         assertEquals(0, ai.get());
     }

     /**
      * get returns the last value set
      */
     public void testGetSet() {
         AtomicLong ai = new AtomicLong(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() {
         AtomicLong ai = new AtomicLong(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() {
         AtomicLong ai = new AtomicLong(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 AtomicLong ai = new AtomicLong(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() {
         AtomicLong ai = new AtomicLong(1);
         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());
     }

     /**
      * getAndSet returns previous value and sets to given value
      */
     public void testGetAndSet() {
         AtomicLong ai = new AtomicLong(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() {
         AtomicLong ai = new AtomicLong(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() {
         AtomicLong ai = new AtomicLong(1);
         assertEquals(1, ai.getAndDecrement());
         assertEquals(0, ai.getAndDecrement());
         assertEquals(-1, ai.getAndDecrement());
     }

     /**
      * getAndIncrement returns previous value and increments
      */
     public void testGetAndIncrement() {
         AtomicLong ai = new AtomicLong(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() {
         AtomicLong ai = new AtomicLong(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() {
         AtomicLong ai = new AtomicLong(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() {
         AtomicLong ai = new AtomicLong(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/reserialized atomic holds same value
      */
     public void testSerialization() throws Exception {
         AtomicLong x = new AtomicLong();
         AtomicLong y = serialClone(x);
         assertNotSame(x, y);
         x.set(-22);
         AtomicLong z = serialClone(x);
         assertNotSame(y, z);
         assertEquals(-22, x.get());
         assertEquals(0, y.get());
         assertEquals(-22, z.get());
     }

     /**
      * toString returns current value.
      */
     public void testToString() {
         AtomicLong ai = new AtomicLong();
         assertEquals("0", ai.toString());
         for (long x : VALUES) {
             ai.set(x);
             assertEquals(Long.toString(x), ai.toString());
         }
     }

     /**
      * intValue returns current value.
      */
     public void testIntValue() {
         AtomicLong ai = new AtomicLong();
         assertEquals(0, ai.intValue());
         for (long x : VALUES) {
             ai.set(x);
             assertEquals((int)x, ai.intValue());
         }
     }

     /**
      * longValue returns current value.
      */
     public void testLongValue() {
         AtomicLong ai = new AtomicLong();
         assertEquals(0L, ai.longValue());
         for (long x : VALUES) {
             ai.set(x);
             assertEquals(x, ai.longValue());
         }
     }

     /**
      * floatValue returns current value.
      */
     public void testFloatValue() {
         AtomicLong ai = new AtomicLong();
         assertEquals(0.0f, ai.floatValue());
         for (long x : VALUES) {
             ai.set(x);
             assertEquals((float)x, ai.floatValue());
         }
     }

     /**
      * doubleValue returns current value.
      */
     public void testDoubleValue() {
         AtomicLong ai = new AtomicLong();
         assertEquals(0.0d, ai.doubleValue());
         for (long x : VALUES) {
             ai.set(x);
             assertEquals((double)x, ai.doubleValue());
         }
     }

 }
	/*
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	* This file is available under and governed by the GNU General Public
	* License version 2 only, as published by the Free Software Foundation.
	* However, the following notice accompanied the original version of this
	* file:
	*
	* 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.
	*/

	import java.util.concurrent.atomic.AtomicLong;

	import junit.framework.Test;
	import junit.framework.TestSuite;

	public class AtomicLongTest extends JSR166TestCase {
	public static void main(String[] args) {
	main(suite(), args);
	}
	public static Test suite() {
	return new TestSuite(AtomicLongTest.class);
	}

	final long[] VALUES = {
	Long.MIN_VALUE,
	Integer.MIN_VALUE, -1, 0, 1, 42, Integer.MAX_VALUE,
	Long.MAX_VALUE,
	};

	/**
	* constructor initializes to given value
	*/
	public void testConstructor() {
	AtomicLong ai = new AtomicLong(1);
	assertEquals(1, ai.get());
	}

	/**
	* default constructed initializes to zero
	*/
	public void testConstructor2() {
	AtomicLong ai = new AtomicLong();
	assertEquals(0, ai.get());
	}

	/**
	* get returns the last value set
	*/
	public void testGetSet() {
	AtomicLong ai = new AtomicLong(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() {
	AtomicLong ai = new AtomicLong(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() {
	AtomicLong ai = new AtomicLong(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 AtomicLong ai = new AtomicLong(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() {
	AtomicLong ai = new AtomicLong(1);
	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());
	}

	/**
	* getAndSet returns previous value and sets to given value
	*/
	public void testGetAndSet() {
	AtomicLong ai = new AtomicLong(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() {
	AtomicLong ai = new AtomicLong(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() {
	AtomicLong ai = new AtomicLong(1);
	assertEquals(1, ai.getAndDecrement());
	assertEquals(0, ai.getAndDecrement());
	assertEquals(-1, ai.getAndDecrement());
	}

	/**
	* getAndIncrement returns previous value and increments
	*/
	public void testGetAndIncrement() {
	AtomicLong ai = new AtomicLong(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() {
	AtomicLong ai = new AtomicLong(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() {
	AtomicLong ai = new AtomicLong(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() {
	AtomicLong ai = new AtomicLong(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/reserialized atomic holds same value
	*/
	public void testSerialization() throws Exception {
	AtomicLong x = new AtomicLong();
	AtomicLong y = serialClone(x);
	assertNotSame(x, y);
	x.set(-22);
	AtomicLong z = serialClone(x);
	assertNotSame(y, z);
	assertEquals(-22, x.get());
	assertEquals(0, y.get());
	assertEquals(-22, z.get());
	}

	/**
	* toString returns current value.
	*/
	public void testToString() {
	AtomicLong ai = new AtomicLong();
	assertEquals("0", ai.toString());
	for (long x : VALUES) {
	ai.set(x);
	assertEquals(Long.toString(x), ai.toString());
	}
	}

	/**
	* intValue returns current value.
	*/
	public void testIntValue() {
	AtomicLong ai = new AtomicLong();
	assertEquals(0, ai.intValue());
	for (long x : VALUES) {
	ai.set(x);
	assertEquals((int)x, ai.intValue());
	}
	}

	/**
	* longValue returns current value.
	*/
	public void testLongValue() {
	AtomicLong ai = new AtomicLong();
	assertEquals(0L, ai.longValue());
	for (long x : VALUES) {
	ai.set(x);
	assertEquals(x, ai.longValue());
	}
	}

	/**
	* floatValue returns current value.
	*/
	public void testFloatValue() {
	AtomicLong ai = new AtomicLong();
	assertEquals(0.0f, ai.floatValue());
	for (long x : VALUES) {
	ai.set(x);
	assertEquals((float)x, ai.floatValue());
	}
	}

	/**
	* doubleValue returns current value.
	*/
	public void testDoubleValue() {
	AtomicLong ai = new AtomicLong();
	assertEquals(0.0d, ai.doubleValue());
	for (long x : VALUES) {
	ai.set(x);
	assertEquals((double)x, ai.doubleValue());
	}
	}

	}