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e7195f6214
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94 lines
2.9 KiB
Java
94 lines
2.9 KiB
Java
/*
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* Copyright 2000-2017 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.intellij.util;
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import junit.framework.TestCase;
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public class IntSLRUCacheTest extends TestCase {
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private static IntSLRUCache<String> createCache(int prot, int prob) {
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return new IntSLRUCache<>(prot, prob);
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}
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public void testCachedAfterAdd() {
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IntSLRUCache<String> cache = createCache(1, 1);
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cache.cacheEntry(0, "0");
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assert cache.getCachedEntry(0) != null;
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assert cache.getCachedEntry(1) == null;
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}
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public void testEvictInfrequent() {
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IntSLRUCache<String> cache = createCache(2, 2);
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cache.cacheEntry(0, "0");
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cache.cacheEntry(1, "1");
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cache.cacheEntry(2, "2");
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assert cache.getCachedEntry(0) == null;
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assert cache.getCachedEntry(1) != null;
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assert cache.getCachedEntry(2) != null;
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}
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public void testFrequentlyAccessedShouldSurvive() {
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IntSLRUCache<String> cache = createCache(2, 2);
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cache.cacheEntry(0, "0");
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cache.cacheEntry(1, "1");
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assert cache.getCachedEntry(0) != null;
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cache.cacheEntry(2, "2");
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cache.cacheEntry(3, "3");
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assert cache.getCachedEntry(0) != null;
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assert cache.getCachedEntry(1) == null;
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assert cache.getCachedEntry(2) != null;
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}
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public void testDropFrequentlyAccessedInThePast() {
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IntSLRUCache<String> cache = createCache(1, 1);
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cache.cacheEntry(0, "0");
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assert cache.getCachedEntry(0) != null; // protected now
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cache.cacheEntry(1, "1");
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cache.cacheEntry(2, "2");
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assert cache.getCachedEntry(0) != null; // still protected
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assert cache.getCachedEntry(1) == null;
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assert cache.getCachedEntry(2) != null; // protected now instead of 0
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cache.cacheEntry(1, "1");
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assert cache.getCachedEntry(0) == null;
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assert cache.getCachedEntry(2) != null;
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assert cache.getCachedEntry(1) != null;
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}
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public void testChangingWorkingSet() {
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IntSLRUCache<String> cache = createCache(1, 1);
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cache.cacheEntry(0, "0");
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assert cache.getCachedEntry(0) != null;
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cache.cacheEntry(1, "1");
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assert cache.getCachedEntry(1) != null;
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assert cache.getCachedEntry(0) != null;
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assert cache.getCachedEntry(1) != null;
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assert cache.getCachedEntry(0) != null;
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cache.cacheEntry(2, "2");
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assert cache.getCachedEntry(2) != null;
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assert cache.getCachedEntry(0) != null;
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assert cache.getCachedEntry(1) == null;
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}
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}
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