| /** |
| * 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.hadoop.util; |
| |
| import java.util.ArrayList; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import org.junit.Assert; |
| |
| import org.apache.hadoop.util.IdentityHashStore; |
| import org.apache.hadoop.util.IdentityHashStore.Visitor; |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class TestIdentityHashStore { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(TestIdentityHashStore.class.getName()); |
| |
| private static class Key { |
| private final String name; |
| |
| Key(String name) { |
| this.name = name; |
| } |
| |
| @Override |
| public int hashCode() { |
| throw new RuntimeException("should not be used!"); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!(o instanceof Key)) { |
| return false; |
| } |
| Key other = (Key)o; |
| return name.equals(other.name); |
| } |
| } |
| |
| @Test(timeout=60000) |
| public void testStartingWithZeroCapacity() { |
| IdentityHashStore<Key, Integer> store = |
| new IdentityHashStore<Key, Integer>(0); |
| store.visitAll(new Visitor<Key, Integer>() { |
| @Override |
| public void accept(Key k, Integer v) { |
| Assert.fail("found key " + k + " in empty IdentityHashStore."); |
| } |
| }); |
| Assert.assertTrue(store.isEmpty()); |
| final Key key1 = new Key("key1"); |
| Integer value1 = new Integer(100); |
| store.put(key1, value1); |
| Assert.assertTrue(!store.isEmpty()); |
| Assert.assertEquals(value1, store.get(key1)); |
| store.visitAll(new Visitor<Key, Integer>() { |
| @Override |
| public void accept(Key k, Integer v) { |
| Assert.assertEquals(key1, k); |
| } |
| }); |
| Assert.assertEquals(value1, store.remove(key1)); |
| Assert.assertTrue(store.isEmpty()); |
| } |
| |
| @Test(timeout=60000) |
| public void testDuplicateInserts() { |
| IdentityHashStore<Key, Integer> store = |
| new IdentityHashStore<Key, Integer>(4); |
| store.visitAll(new Visitor<Key, Integer>() { |
| @Override |
| public void accept(Key k, Integer v) { |
| Assert.fail("found key " + k + " in empty IdentityHashStore."); |
| } |
| }); |
| Assert.assertTrue(store.isEmpty()); |
| Key key1 = new Key("key1"); |
| Integer value1 = new Integer(100); |
| Integer value2 = new Integer(200); |
| Integer value3 = new Integer(300); |
| store.put(key1, value1); |
| Key equalToKey1 = new Key("key1"); |
| |
| // IdentityHashStore compares by object equality, not equals() |
| Assert.assertNull(store.get(equalToKey1)); |
| |
| Assert.assertTrue(!store.isEmpty()); |
| Assert.assertEquals(value1, store.get(key1)); |
| store.put(key1, value2); |
| store.put(key1, value3); |
| final List<Integer> allValues = new LinkedList<Integer>(); |
| store.visitAll(new Visitor<Key, Integer>() { |
| @Override |
| public void accept(Key k, Integer v) { |
| allValues.add(v); |
| } |
| }); |
| Assert.assertEquals(3, allValues.size()); |
| for (int i = 0; i < 3; i++) { |
| Integer value = store.remove(key1); |
| Assert.assertTrue(allValues.remove(value)); |
| } |
| Assert.assertNull(store.remove(key1)); |
| Assert.assertTrue(store.isEmpty()); |
| } |
| |
| @Test(timeout=60000) |
| public void testAdditionsAndRemovals() { |
| IdentityHashStore<Key, Integer> store = |
| new IdentityHashStore<Key, Integer>(0); |
| final int NUM_KEYS = 1000; |
| LOG.debug("generating " + NUM_KEYS + " keys"); |
| final List<Key> keys = new ArrayList<Key>(NUM_KEYS); |
| for (int i = 0; i < NUM_KEYS; i++) { |
| keys.add(new Key("key " + i)); |
| } |
| for (int i = 0; i < NUM_KEYS; i++) { |
| store.put(keys.get(i), i); |
| } |
| store.visitAll(new Visitor<Key, Integer>() { |
| @Override |
| public void accept(Key k, Integer v) { |
| Assert.assertTrue(keys.contains(k)); |
| } |
| }); |
| for (int i = 0; i < NUM_KEYS; i++) { |
| Assert.assertEquals(Integer.valueOf(i), |
| store.remove(keys.get(i))); |
| } |
| store.visitAll(new Visitor<Key, Integer>() { |
| @Override |
| public void accept(Key k, Integer v) { |
| Assert.fail("expected all entries to be removed"); |
| } |
| }); |
| Assert.assertTrue("expected the store to be " + |
| "empty, but found " + store.numElements() + " elements.", |
| store.isEmpty()); |
| Assert.assertEquals(1024, store.capacity()); |
| } |
| |
| } |