org.broadleafcommerce.common.util.EfficientLRUMapTest.java Source code

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Here is the source code for org.broadleafcommerce.common.util.EfficientLRUMapTest.java

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/*
 * #%L
 * BroadleafCommerce Common Libraries
 * %%
 * Copyright (C) 2009 - 2013 Broadleaf Commerce
 * %%
 * 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.
 * #L%
 */

package org.broadleafcommerce.common.util;

import org.apache.commons.collections4.map.LRUMap;

import java.util.concurrent.ConcurrentHashMap;

import junit.framework.TestCase;

public class EfficientLRUMapTest extends TestCase {

    public void testMapSwitch() {
        EfficientLRUMap<String, String> testMap = new EfficientLRUMap<String, String>(5);

        // Test basics for a single name value pair
        testMap.put("key1", "value1");
        assertEquals("The value for key1 should be value 1", "value1", testMap.get("key1"));
        assertEquals("The size() for the map should be 1", 1, testMap.size());
        assertEquals("The type of Map should be ConcurrentHashMap", testMap.getUnderlyingMapClass(),
                ConcurrentHashMap.class);

        // Add keys up to the limit
        testMap.put("key2", "value2");
        testMap.put("key3", "value3");
        testMap.put("key4", "value4");
        testMap.put("key5", "value5");

        // Validate last items and map type.
        assertEquals("The value for key5 should be value5", "value5", testMap.get("key5"));
        assertEquals("The size() for the map should be 5", 5, testMap.size());
        assertEquals("The type of Map should be ConcurrentHashMap", testMap.getUnderlyingMapClass(),
                ConcurrentHashMap.class);

        // Updating an item shouldn't change the map type
        testMap.put("key5", "value5b");
        assertEquals("The value for key5 should now be value5b", "value5b", testMap.get("key5"));
        assertEquals("The size() for the map should be 5", 5, testMap.size());
        assertEquals("The type of Map should be ConcurrentHashMap", testMap.getUnderlyingMapClass(),
                ConcurrentHashMap.class);

        // Add another item which should trigger a switch in the map type
        testMap.put("key6", "value6");
        assertEquals("The value for key1 should still be value1", "value1", testMap.get("key1"));
        assertEquals("The value for key6 should be value6", "value6", testMap.get("key6"));
        assertEquals("The size() for the map should be 5 since we are now LRU", 5, testMap.size());
        assertTrue("The type of Map should not be a ConcurrentHashMap.   It should be a synchronized map",
                !testMap.getUnderlyingMapClass().equals(LRUMap.class));
    }
}