MessageQueueTest.java

/*
 * Copyright (c) 2013-2017 Cinchapi Inc.
 * 
 * Licensed 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 com.cinchapi.concourse.server.plugin.io;

import java.util.Map;

import org.junit.Assert;
import org.junit.Test;

import com.cinchapi.common.reflect.Reflection;
import com.cinchapi.concourse.util.ByteBuffers;
import com.cinchapi.concourse.util.FileOps;

/**
 * Unit tests for {@link MessageQueue} class.
 * 
 * @author Jeff Nelson
 */
public class MessageQueueTest extends InterProcessCommunicationTest {

    @Override
    protected InterProcessCommunication getInterProcessCommunication() {
        return new MessageQueue();
    }

    @Override
    protected InterProcessCommunication getInterProcessCommunication(
            String file) {
        return new MessageQueue(file);
    }

    @Override
    protected InterProcessCommunication getInterProcessCommunication(
            String file, int capacity) {
        return getInterProcessCommunication(file);
    }
    
    @Test
    public void testReadersAreCached() throws Exception{
        String file = FileOps.tempFile();
        MessageQueue reader = new MessageQueue(file);
        MessageQueue writer = new MessageQueue(file);
        writer.write(ByteBuffers.fromString("hello"));
        Assert.assertFalse(((Map<?,?>) Reflection.get("readers", writer)).isEmpty());
        reader.close();
        writer.close();
    }

}