| /* |
| * 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. |
| */ |
| package org.apache.geode.internal; |
| |
| import static org.assertj.core.api.Assertions.assertThat; |
| |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.junit.Test; |
| |
| public class ThreadLocalByteArrayCacheTest { |
| private ThreadLocalByteArrayCache instance = new ThreadLocalByteArrayCache(2); |
| |
| @Test |
| public void emptyArrayReturned() { |
| byte[] byteArray = instance.get(0); |
| |
| assertThat(byteArray).hasSize(0); |
| } |
| |
| @Test |
| public void largerRequestCreatesNewArray() { |
| byte[] byteArrayZero = instance.get(0); |
| byte[] byteArrayOne = instance.get(1); |
| |
| assertThat(byteArrayZero).hasSize(0); |
| assertThat(byteArrayOne).hasSize(1); |
| } |
| |
| @Test |
| public void smallerRequestCreatesReturnsPreviousArray() { |
| byte[] byteArrayOne = instance.get(1); |
| byte[] byteArrayZero = instance.get(0); |
| |
| assertThat(byteArrayOne).hasSize(1); |
| assertThat(byteArrayZero).isSameAs(byteArrayOne); |
| } |
| |
| @Test |
| public void requestsLargerThanMaximumAreNotCached() { |
| byte[] byteArrayLarge = instance.get(100); |
| byte[] byteArrayZero = instance.get(0); |
| |
| assertThat(byteArrayLarge).hasSize(100); |
| assertThat(byteArrayZero).isNotSameAs(byteArrayLarge); |
| |
| } |
| |
| @Test |
| public void equalRequestCreatesReturnsPreviousArray() { |
| byte[] byteArrayFirst = instance.get(1); |
| byte[] byteArraySecond = instance.get(1); |
| |
| assertThat(byteArrayFirst).hasSize(1); |
| assertThat(byteArraySecond).isSameAs(byteArrayFirst); |
| } |
| |
| @Test |
| public void threadsGetDifferentByteArrays() throws InterruptedException { |
| byte[] byteArrayZero = instance.get(0); |
| final AtomicReference<byte[]> byteArrayHolder = new AtomicReference<>(); |
| Thread thread = new Thread(() -> { |
| byteArrayHolder.set(instance.get(0)); |
| }); |
| thread.start(); |
| thread.join(); |
| |
| assertThat(byteArrayZero).hasSize(0); |
| assertThat(byteArrayHolder.get()).hasSize(0); |
| assertThat(byteArrayHolder.get()).isNotSameAs(byteArrayZero); |
| |
| } |
| } |