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Convert volatile long/double values to Atomic counterparts, #1063
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src/Lucene.Net.Tests/Support/Threading/AtomicDoubleTest.cs
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|---|---|---|
| @@ -0,0 +1,255 @@ | ||
| using Lucene.Net.Support.Threading; | ||
| using Lucene.Net.Util; | ||
| using NUnit.Framework; | ||
| using System; | ||
| using System.Threading; | ||
|
|
||
| namespace Lucene.Net.Threading | ||
| { | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| /// <summary> | ||
| /// This is a modified copy of J2N's TestAtomicInt64, | ||
| /// modified to test <see cref="AtomicDouble"/> | ||
| /// </summary> | ||
| [TestFixture] | ||
| public class AtomicDoubleTest : LuceneTestCase | ||
| { | ||
| private const int LONG_DELAY_MS = 50 * 50; | ||
|
|
||
| /** | ||
| * fail with message "Unexpected exception" | ||
| */ | ||
| public void unexpectedException() | ||
| { | ||
| fail("Unexpected exception"); | ||
| } | ||
|
|
||
| /** | ||
| * constructor initializes to given value | ||
| */ | ||
| [Test] | ||
| public void TestConstructor() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(1.0d); | ||
| assertEquals(1.0d, ai); | ||
| } | ||
|
|
||
| /** | ||
| * default constructed initializes to zero | ||
| */ | ||
| [Test] | ||
| public void TestConstructor2() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(); | ||
| assertEquals(0.0d, ai.Value); | ||
| } | ||
|
|
||
| /** | ||
| * get returns the last value set | ||
| */ | ||
| [Test] | ||
| public void TestGetSet() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(1); | ||
| assertEquals(1.0d, ai); | ||
| ai.Value = 2.0d; | ||
| assertEquals(2.0d, ai); | ||
| ai.Value = -3.0d; | ||
| assertEquals(-3.0d, ai); | ||
|
|
||
| } | ||
|
|
||
| /** | ||
| * compareAndSet succeeds in changing value if equal to expected else fails | ||
| */ | ||
| [Test] | ||
| public void TestCompareAndSet() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(1.0d); | ||
| assertTrue(ai.CompareAndSet(1.0d, 2.0d)); | ||
| assertTrue(ai.CompareAndSet(2.0d, -4.0d)); | ||
| assertEquals(-4.0d, ai.Value); | ||
| assertFalse(ai.CompareAndSet(-5.0d, 7.0d)); | ||
| assertFalse(7.0d.Equals(ai.Value)); | ||
| assertTrue(ai.CompareAndSet(-4.0d, 7.0d)); | ||
| assertEquals(7.0d, ai.Value); | ||
| } | ||
|
|
||
| /** | ||
| * compareAndSet in one thread enables another waiting for value | ||
| * to succeed | ||
| */ | ||
| [Test] | ||
| public void TestCompareAndSetInMultipleThreads() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(1.0d); | ||
| Thread t = new Thread(() => | ||
| { | ||
| while (!ai.CompareAndSet(2.0d, 3.0d)) Thread.Yield(); | ||
| }); | ||
| try | ||
| { | ||
| t.Start(); | ||
| assertTrue(ai.CompareAndSet(1.0d, 2.0d)); | ||
| t.Join(LONG_DELAY_MS); | ||
| assertFalse(t.IsAlive); | ||
| assertEquals(ai.Value, 3.0d); | ||
| } | ||
| catch (Exception /*e*/) | ||
| { | ||
| unexpectedException(); | ||
| } | ||
| } | ||
|
|
||
| // /** | ||
| // * repeated weakCompareAndSet succeeds in changing value when equal | ||
| // * to expected | ||
| // */ | ||
| //[Test] | ||
| // public void TestWeakCompareAndSet() | ||
| //{ | ||
| // AtomicDouble ai = new AtomicDouble(1); | ||
| // while (!ai.WeakCompareAndSet(1, 2)) ; | ||
| // while (!ai.WeakCompareAndSet(2, -4)) ; | ||
| // assertEquals(-4, ai.Value); | ||
| // while (!ai.WeakCompareAndSet(-4, 7)) ; | ||
| // assertEquals(7, ai.Value); | ||
| //} | ||
|
|
||
| /** | ||
| * getAndSet returns previous value and sets to given value | ||
| */ | ||
| [Test] | ||
| public void TestGetAndSet() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(1.0d); | ||
| assertEquals(1.0d, ai.GetAndSet(0.0d)); | ||
| assertEquals(0.0d, ai.GetAndSet(-10.0d)); | ||
| assertEquals(-10.0d, ai.GetAndSet(1.0d)); | ||
| } | ||
|
|
||
| #if FEATURE_SERIALIZABLE | ||
| /** | ||
| * a deserialized serialized atomic holds same value | ||
| */ | ||
| [Test] | ||
| public void TestSerialization() | ||
| { | ||
| AtomicDouble l = new AtomicDouble(); | ||
|
|
||
| try | ||
| { | ||
| l.Value = 22.0d; | ||
| AtomicDouble r = Clone(l); | ||
| assertEquals(l.Value, r.Value); | ||
| } | ||
| catch (Exception /*e*/) | ||
| { | ||
| unexpectedException(); | ||
| } | ||
| } | ||
| #endif | ||
|
|
||
| /** | ||
| * toString returns current value. | ||
| */ | ||
| [Test] | ||
| public void TestToString() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(); | ||
| for (double i = -12.0d; i < 6.0d; i += 1.0d) | ||
| { | ||
| ai.Value = i; | ||
| assertEquals(ai.ToString(), J2N.Numerics.Double.ToString(i)); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * intValue returns current value. | ||
| */ | ||
| [Test] | ||
| public void TestIntValue() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(); | ||
| for (double i = -12.0d; i < 6.0d; ++i) | ||
| { | ||
| ai.Value = i; | ||
| assertEquals((int)i, Convert.ToInt32(ai)); | ||
| } | ||
| } | ||
|
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||
|
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||
| /** | ||
| * longValue returns current value. | ||
| */ | ||
| [Test] | ||
| public void TestLongValue() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(); | ||
| for (double i = -12.0d; i < 6.0d; ++i) | ||
| { | ||
| ai.Value = i; | ||
| assertEquals((long)i, Convert.ToInt64(ai)); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * floatValue returns current value. | ||
| */ | ||
| [Test] | ||
| public void TestFloatValue() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(); | ||
| for (double i = -12.0d; i < 6.0d; ++i) | ||
| { | ||
| ai.Value = i; | ||
| assertEquals((float)i, Convert.ToSingle(ai)); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * doubleValue returns current value. | ||
| */ | ||
| [Test] | ||
| public void TestDoubleValue() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(); | ||
| for (double i = -12.0d; i < 6.0d; ++i) | ||
| { | ||
| ai.Value = i; | ||
| assertEquals((double)i, Convert.ToDouble(ai)); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * doubleValue returns current value. | ||
| */ | ||
| [Test] | ||
| public void TestComparisonOperators() | ||
| { | ||
| AtomicDouble ai = new AtomicDouble(6.0d); | ||
| assertTrue(5.0d < ai); | ||
| assertTrue(9.0d > ai); | ||
| assertTrue(ai > 4.0d); | ||
| assertTrue(ai < 7.0d); | ||
| assertFalse(ai < 6.0d); | ||
| assertTrue(ai <= 6.0d); | ||
| } | ||
| } | ||
| } |
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