| package org.apache.maven.surefire.api.util.internal; |
| |
| /* |
| * 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. |
| */ |
| |
| import org.junit.Test; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.FutureTask; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import static org.apache.maven.surefire.api.util.internal.ConcurrencyUtils.countDownToZero; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.hamcrest.Matchers.is; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.assertFalse; |
| |
| /** |
| * Concurrency utilities. |
| * |
| * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a> |
| * @since 2.19 |
| */ |
| public class ConcurrencyUtilsTest |
| { |
| |
| @Test |
| public void countDownShouldBeUnchangedAsZeroNegativeTest() |
| { |
| AtomicInteger atomicCounter = new AtomicInteger( 0 ); |
| assertFalse( countDownToZero( atomicCounter ) ); |
| assertThat( atomicCounter.get(), is( 0 ) ); |
| } |
| |
| @Test |
| public void countDownShouldBeUnchangedAsNegativeNegativeTest() |
| { |
| AtomicInteger atomicCounter = new AtomicInteger( -1 ); |
| assertFalse( countDownToZero( atomicCounter ) ); |
| assertThat( atomicCounter.get(), is( -1 ) ); |
| } |
| |
| @Test |
| public void countDownShouldBeDecreasedByOneThreadModification() |
| { |
| AtomicInteger atomicCounter = new AtomicInteger( 10 ); |
| assertFalse( countDownToZero( atomicCounter ) ); |
| assertThat( atomicCounter.get(), is( 9 ) ); |
| } |
| |
| @Test |
| public void countDownToZeroShouldBeDecreasedByOneThreadModification() |
| { |
| AtomicInteger atomicCounter = new AtomicInteger( 1 ); |
| assertTrue( countDownToZero( atomicCounter ) ); |
| assertThat( atomicCounter.get(), is( 0 ) ); |
| } |
| |
| @Test |
| public void countDownShouldBeDecreasedByTwoThreadsModification() |
| throws ExecutionException, InterruptedException |
| { |
| final AtomicInteger atomicCounter = new AtomicInteger( 3 ); |
| |
| FutureTask<Boolean> task = new FutureTask<Boolean>( new Callable<Boolean>() |
| { |
| @Override |
| public Boolean call() |
| throws Exception |
| { |
| return countDownToZero( atomicCounter ); |
| } |
| } ); |
| Thread t = new Thread( task ); |
| t.start(); |
| |
| assertFalse( countDownToZero( atomicCounter ) ); |
| |
| assertFalse( task.get() ); |
| |
| assertThat( atomicCounter.get(), is( 1 ) ); |
| |
| assertTrue( countDownToZero( atomicCounter ) ); |
| |
| assertThat( atomicCounter.get(), is( 0 ) ); |
| } |
| |
| } |