| /* |
| * 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 static org.junit.Assert.*; |
| |
| import org.apache.jena.atlas.lib.Cache; |
| import org.junit.Test; |
| |
| /** |
| * Tests of CacheSimple |
| */ |
| public class TestCacheSimple { |
| |
| /** |
| * Simple test to ensure that {@link CacheSimple} evidences |
| * the fixed-size behavior we desire. |
| */ |
| @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(key, value1); |
| testCache.put(key, value2); |
| assertEquals("Wrong size", 1, testCache.size()); |
| assertEquals("Wrong slot contents", value2, testCache.getIfPresent(key)); |
| } |
| |
| @Test |
| public void testSameHash() { |
| CompoundKey key1 = new CompoundKey(1, 1); |
| CompoundKey key2 = new CompoundKey(1, 2); |
| assertEquals(key1.hashCode(), key2.hashCode()); |
| assertNotEquals(key1, key2); |
| Cache<CompoundKey, Integer> cache = new CacheSimple<>(10); |
| cache.put(key1, 1); |
| assertTrue("Same key, expected to be in cache", cache.containsKey(key1)); |
| assertFalse("Keys with same hash code should not be considered equal", cache.containsKey(key2)); |
| } |
| |
| @Test |
| public void testKeyEquality() { |
| CompoundKey key1 = new CompoundKey(1, 1); |
| CompoundKey key2 = new CompoundKey(1, 1); |
| assertNotSame(key1, key2); |
| assertEquals(key1, key2); |
| Cache<CompoundKey, Integer> cache = new CacheSimple<>(10); |
| cache.put(key1, 1); |
| assertTrue("Equal key, expected to be found", cache.containsKey(key2)); |
| } |
| |
| // Compound key for tests. |
| private static final class CompoundKey { |
| private final int a; |
| private final int b; |
| |
| private CompoundKey(int a, int b) { |
| this.a = a; |
| this.b = b; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| CompoundKey that = (CompoundKey) o; |
| return a == that.a && b == that.b; // Checks both "a" and "b" |
| } |
| |
| @Override |
| public int hashCode() { |
| return a; // Doesn't depend on "b" |
| } |
| } |
| } |