11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2011 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * in compliance with the License. You may obtain a copy of the License at 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software distributed under the License 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * or implied. See the License for the specific language governing permissions and limitations under 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * the License. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.cache; 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.cache.CacheTesting.checkEmpty; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.cache.TestingCacheLoaders.constantLoader; 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.cache.TestingCacheLoaders.exceptionLoader; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.cache.TestingRemovalListeners.queuingRemovalListener; 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static java.util.concurrent.TimeUnit.SECONDS; 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.cache.CacheLoader.InvalidCacheLoadException; 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.cache.TestingRemovalListeners.QueuingRemovalListener; 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.util.concurrent.UncheckedExecutionException; 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport junit.framework.TestCase; 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * {@link LoadingCache} tests for caches with a maximum size of zero. 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author mike nonemacher 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic class NullCacheTest extends TestCase { 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert QueuingRemovalListener<Object, Object> listener; 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert protected void setUp() { 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert listener = queuingRemovalListener(); 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testGet() { 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Object computed = new Object(); 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert LoadingCache<Object, Object> cache = CacheBuilder.newBuilder() 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .maximumSize(0) 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .removalListener(listener) 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .build(constantLoader(computed)); 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Object key = new Object(); 501d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(computed, cache.getUnchecked(key)); 511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert RemovalNotification<Object, Object> notification = listener.remove(); 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(key, notification.getKey()); 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(computed, notification.getValue()); 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(RemovalCause.SIZE, notification.getCause()); 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(listener.isEmpty()); 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert checkEmpty(cache); 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testGet_expireAfterWrite() { 601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Object computed = new Object(); 611d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert LoadingCache<Object, Object> cache = CacheBuilder.newBuilder() 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .expireAfterWrite(0, SECONDS) 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .removalListener(listener) 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .build(constantLoader(computed)); 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Object key = new Object(); 671d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(computed, cache.getUnchecked(key)); 681d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert RemovalNotification<Object, Object> notification = listener.remove(); 691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(key, notification.getKey()); 701d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(computed, notification.getValue()); 711d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(RemovalCause.SIZE, notification.getCause()); 721d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(listener.isEmpty()); 731d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert checkEmpty(cache); 741d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 751d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 761d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testGet_expireAfterAccess() { 771d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Object computed = new Object(); 781d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert LoadingCache<Object, Object> cache = CacheBuilder.newBuilder() 791d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .expireAfterAccess(0, SECONDS) 801d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .removalListener(listener) 811d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .build(constantLoader(computed)); 821d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 831d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Object key = new Object(); 841d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(computed, cache.getUnchecked(key)); 851d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert RemovalNotification<Object, Object> notification = listener.remove(); 861d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(key, notification.getKey()); 871d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(computed, notification.getValue()); 881d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(RemovalCause.SIZE, notification.getCause()); 891d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(listener.isEmpty()); 901d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert checkEmpty(cache); 911d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 921d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 931d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testGet_computeNull() { 941d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert LoadingCache<Object, Object> cache = CacheBuilder.newBuilder() 951d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .maximumSize(0) 961d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .removalListener(listener) 971d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .build(constantLoader(null)); 981d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 991d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert try { 1001d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert cache.getUnchecked(new Object()); 1011d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert fail(); 1021d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } catch (InvalidCacheLoadException e) { /* expected */} 1031d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1041d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(listener.isEmpty()); 1051d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert checkEmpty(cache); 1061d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1071d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1081d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testGet_runtimeException() { 1091d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert final RuntimeException e = new RuntimeException(); 1101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert LoadingCache<Object, Object> map = CacheBuilder.newBuilder() 1111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .maximumSize(0) 1121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .removalListener(listener) 1131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert .build(exceptionLoader(e)); 1141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert try { 1161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert map.getUnchecked(new Object()); 1171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert fail(); 1181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } catch (UncheckedExecutionException uee) { 1191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(e, uee.getCause()); 1201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(listener.isEmpty()); 1221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert checkEmpty(map); 1231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 125