| /* |
| * 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.netbeans.modules.parsing.lucene; |
| |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Set; |
| import org.junit.Test; |
| import org.netbeans.junit.NbTestCase; |
| |
| /** |
| * |
| * @author Tomas Zezula |
| */ |
| public class LRUCacheTest extends NbTestCase { |
| |
| public LRUCacheTest(final String name) { |
| super(name); |
| } |
| |
| private Set<Integer> used = new HashSet<Integer>(); |
| |
| @Test |
| public void testLRU() { |
| final LRUCache<Integer,Evictable> ev = new LRUCache<Integer, Evictable>(new TestEvictionPolicy()); |
| final Set<Integer> golden = new HashSet<Integer>(); |
| for (int i=0; i<10; i++) { |
| used.add(i); |
| ev.put(i, new EvictableInt(i)); |
| } |
| for (int i=0; i<5; i++) { |
| used.add(i); |
| golden.add(i); |
| ev.put(i, new EvictableInt(i)); |
| } |
| for (int i=10; i<15; i++) { |
| used.add(i); |
| golden.add(i); |
| ev.put(i, new EvictableInt(i)); |
| } |
| assertEquals(golden, used); |
| } |
| |
| public void testClear() { |
| final LRUCache<Integer,Evictable> ev = new LRUCache<>(new TestEvictionPolicy()); |
| for (int i=0; i<10; i++) { |
| ev.put(i, new EvictableInt(i)); |
| } |
| Collection<? extends Evictable> removed = ev.clear(); |
| assertEquals(10, removed.size()); |
| removed = ev.clear(); |
| assertEquals(0, removed.size()); |
| } |
| |
| private static class TestEvictionPolicy implements EvictionPolicy<Integer,Evictable> { |
| @Override |
| public boolean shouldEvict(int size, Integer key, Evictable value) { |
| return size > 10; |
| } |
| } |
| |
| private class EvictableInt implements Evictable { |
| |
| private Integer value; |
| |
| public EvictableInt(final int i) { |
| this.value = i; |
| } |
| |
| @Override |
| public void evicted() { |
| used.remove(value); |
| } |
| } |
| |
| } |