TestCacheSimple.java

/*
 * 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.jena.atlas.lib.cache;

import static java.util.stream.Collectors.toMap;
import static java.util.stream.IntStream.rangeClosed;

import org.apache.jena.atlas.junit.BaseTest;
import org.apache.jena.atlas.lib.Cache;
import org.junit.Test;

/**
 * Simple test to ensure that {@link CacheSimple} evidences the fixed-size
 * behavior we desire.
 */
public class TestCacheSimple extends BaseTest {

	@Test
	public void testFixedSize() {
		final int maxSize = 5;
		final int submittedEntries = 10;
		final Cache<Integer, Object> testCache = new CacheSimple<>(maxSize);
		rangeClosed(1, submittedEntries).boxed().collect(toMap(k -> k, v -> 1))
				.forEach(testCache::put);
		assertEquals("Test cache failed to maintain fixed size!", maxSize, testCache.size());
	}
	
	@Test
	public void testReplace() {
	    final Integer key = 1 ;
	    final String value1 = "A" ;
        final String value2 = "B" ;
	    
	    final Cache<Integer, Object> testCache = new CacheSimple<>(5);
	    testCache.put(1,  value1);
	    testCache.put(1,  value2);
	    assertEquals("Wrong size", 1, testCache.size()) ;
	    assertEquals("Wrong slot contents", value2, testCache.getIfPresent(1)) ;
	}

}