| /* |
| * 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.lucene.facet.taxonomy; |
| |
| import org.apache.lucene.facet.FacetTestCase; |
| import org.junit.Test; |
| |
| public class TestLRUHashMap extends FacetTestCase { |
| // testLRU() tests that the specified size limit is indeed honored, and |
| // the remaining objects in the map are indeed those that have been most |
| // recently used |
| @Test |
| public void testLRU() throws Exception { |
| LRUHashMap<String, String> lru = new LRUHashMap<>(3); |
| assertEquals(0, lru.size()); |
| lru.put("one", "Hello world"); |
| assertEquals(1, lru.size()); |
| lru.put("two", "Hi man"); |
| assertEquals(2, lru.size()); |
| lru.put("three", "Bonjour"); |
| assertEquals(3, lru.size()); |
| lru.put("four", "Shalom"); |
| assertEquals(3, lru.size()); |
| assertNotNull(lru.get("three")); |
| assertNotNull(lru.get("two")); |
| assertNotNull(lru.get("four")); |
| assertNull(lru.get("one")); |
| lru.put("five", "Yo!"); |
| assertEquals(3, lru.size()); |
| assertNull(lru.get("three")); // three was last used, so it got removed |
| assertNotNull(lru.get("five")); |
| lru.get("four"); |
| lru.put("six", "hi"); |
| lru.put("seven", "hey dude"); |
| assertEquals(3, lru.size()); |
| assertNull(lru.get("one")); |
| assertNull(lru.get("two")); |
| assertNull(lru.get("three")); |
| assertNotNull(lru.get("four")); |
| assertNull(lru.get("five")); |
| assertNotNull(lru.get("six")); |
| assertNotNull(lru.get("seven")); |
| } |
| } |