cassandra-trunk/test/unit/org/apache/cassandra/locator/AbstractReplicationStrategyTest.java
/*
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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,
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 * See the License for the specific language governing permissions and
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 */

package org.apache.cassandra.locator;

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

public class AbstractReplicationStrategyTest
{
    @Test
    public void testReplicaCache()
    {
        AbstractReplicationStrategy.ReplicaCache<Integer, Integer> cache = new AbstractReplicationStrategy.ReplicaCache<>();

        cache.put(10, 1, 1);
        assertEquals(1, (int)cache.get(10, 1));
        assertNull(cache.get(9,1)); // get with old ringversion, return null to force a recalculation
        assertNull(cache.get(11,1)); // newer ringVersion - cache gets cleared
        assertNull(cache.get(10,1)); // and make sure the map got cleared

        cache.put(11, 1, 100);
        cache.put(10, 1, 99);
        assertEquals(100, (int)cache.get(11, 1));
        assertNull(cache.get(12, 55));
        assertNull(cache.get(11, 1));
    }
}
