| // CHECKSTYLE_OFF: Copyrighted to members of JCP JSR-166 Expert Group. |
| /* |
| * 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 |
| * Other contributors include Andrew Wright, Jeffrey Hayes, |
| * Pat Fisher, Mike Judd |
| */ |
| // CHECKSTYLE_ON |
| package com.google.gwt.emultest.java.util.concurrent.atomic; |
| |
| import com.google.gwt.emultest.java.util.EmulTestBase; |
| |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| /** |
| * Tests for {@link java.util.concurrent.atomic.AtomicLong}. |
| * It's adopted from tests from {@code git://android.git.kernel.org/platform/dalvik.git}. |
| */ |
| public class AtomicLongTest extends EmulTestBase { |
| |
| /** 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()); |
| } |
| |
| /** 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)); |
| assertFalse((7 == ai.get())); |
| assertTrue(ai.compareAndSet(-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()); |
| } |
| |
| /** toString returns current value. */ |
| public void testToString() { |
| AtomicLong ai = new AtomicLong(); |
| for (long i = -12; i < 6; ++i) { |
| ai.set(i); |
| assertEquals(ai.toString(), Long.toString(i)); |
| } |
| } |
| |
| /** intValue returns current value. */ |
| public void testIntValue() { |
| AtomicLong ai = new AtomicLong(); |
| for (long i = -12; i < 6; ++i) { |
| ai.set(i); |
| assertEquals(i, ai.intValue()); |
| } |
| } |
| |
| /** longValue returns current value. */ |
| public void testLongValue() { |
| AtomicLong ai = new AtomicLong(); |
| for (long i = -12; i < 6; ++i) { |
| ai.set(i); |
| assertEquals(i, ai.longValue()); |
| } |
| } |
| |
| /** floatValue returns current value. */ |
| public void testFloatValue() { |
| AtomicLong ai = new AtomicLong(); |
| for (long i = -12; i < 6; ++i) { |
| ai.set(i); |
| assertEquals((float) i, ai.floatValue(), 0.0); |
| } |
| } |
| |
| /** doubleValue returns current value. */ |
| public void testDoubleValue() { |
| AtomicLong ai = new AtomicLong(); |
| for (long i = -12; i < 6; ++i) { |
| ai.set(i); |
| assertEquals((double) i, ai.doubleValue(), 0.0); |
| } |
| } |
| } |