///*
// * 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.commons.collections4.map;
//
//import java.lang.ref.WeakReference;
//import java.util.Iterator;
//import java.util.Map;
//
//import junit.framework.Test;
//
//import org.apache.commons.collections4.BulkTest;
//import org.apache.commons.collections4.IterableMap;
//import org.apache.commons.collections4.map.AbstractReferenceMap.ReferenceStrength;
//
///**
// * Tests for ReferenceIdentityMap.
// *
// * @version $Id$
// */
//public class ReferenceIdentityMapTest<K, V> extends AbstractIterableMapTest<K, V> {
//
// private static final Integer I1A = new Integer(1); // Cannot use valueOf here
// private static final Integer I1B = new Integer(1);
// private static final Integer I2A = new Integer(2);
// private static final Integer I2B = new Integer(2);
//
// public ReferenceIdentityMapTest(final String testName) {
// super(testName);
// }
//
// public static Test suite() {
// return BulkTest.makeSuite(ReferenceIdentityMapTest.class);
// }
//
// @Override
// public ReferenceIdentityMap<K, V> makeObject() {
// return new ReferenceIdentityMap<K, V>(ReferenceStrength.WEAK, ReferenceStrength.WEAK);
// }
//
// @Override
// public Map<K, V> makeConfirmedMap() {
// // Testing against another [collections] class generally isn't a good idea,
// // but the closest alternative is IdentityHashMap, which propagates reference-equality down to keySet and values.
// // arguably ReferenceIdentityMap should do the same but that's a later discussion.
// return new IdentityMap<K, V>();
// }
//
// @Override
// public boolean isAllowNullKey() {
// return false;
// }
//
// @Override
// public boolean isAllowNullValue() {
// return false;
// }
//
// @Override
// public String getCompatibilityVersion() {
// return "4";
// }
//
//// public void testCreate() throws Exception {
//// resetEmpty();
//// writeExternalFormToDisk(
//// (java.io.Serializable) map,
//// "src/test/resources/data/test/ReferenceIdentityMap.emptyCollection.version4.obj");
//// resetFull();
//// writeExternalFormToDisk(
//// (java.io.Serializable) map,
//// "src/test/resources/data/test/ReferenceIdentityMap.fullCollection.version4.obj");
//// }
//
// //-----------------------------------------------------------------------
// @SuppressWarnings("unchecked")
// public void testBasics() {
// final IterableMap<K, V> map = new ReferenceIdentityMap<K, V>(ReferenceStrength.HARD, ReferenceStrength.HARD);
// assertEquals(0, map.size());
//
// map.put((K) I1A, (V) I2A);
// assertEquals(1, map.size());
// assertSame(I2A, map.get(I1A));
// assertSame(null, map.get(I1B));
// assertEquals(true, map.containsKey(I1A));
// assertEquals(false, map.containsKey(I1B));
// assertEquals(true, map.containsValue(I2A));
// assertEquals(false, map.containsValue(I2B));
//
// map.put((K) I1A, (V) I2B);
// assertEquals(1, map.size());
// assertSame(I2B, map.get(I1A));
// assertSame(null, map.get(I1B));
// assertEquals(true, map.containsKey(I1A));
// assertEquals(false, map.containsKey(I1B));
// assertEquals(false, map.containsValue(I2A));
// assertEquals(true, map.containsValue(I2B));
//
// map.put((K) I1B, (V) I2B);
// assertEquals(2, map.size());
// assertSame(I2B, map.get(I1A));
// assertSame(I2B, map.get(I1B));
// assertEquals(true, map.containsKey(I1A));
// assertEquals(true, map.containsKey(I1B));
// assertEquals(false, map.containsValue(I2A));
// assertEquals(true, map.containsValue(I2B));
// }
//
// //-----------------------------------------------------------------------
// @SuppressWarnings("unchecked")
// public void testHashEntry() {
// final IterableMap<K, V> map = new ReferenceIdentityMap<K, V>(ReferenceStrength.HARD, ReferenceStrength.HARD);
//
// map.put((K) I1A, (V) I2A);
// map.put((K) I1B, (V) I2A);
//
// final Map.Entry<K, V> entry1 = map.entrySet().iterator().next();
// final Iterator<Map.Entry<K, V>> it = map.entrySet().iterator();
// final Map.Entry<K, V> entry2 = it.next();
// final Map.Entry<K, V> entry3 = it.next();
//
// assertEquals(true, entry1.equals(entry2));
// assertEquals(true, entry2.equals(entry1));
// assertEquals(false, entry1.equals(entry3));
// }
//
// //-----------------------------------------------------------------------
// @SuppressWarnings("unchecked")
// public void testNullHandling() {
// resetFull();
// assertEquals(null, getMap().get(null));
// assertEquals(false, getMap().containsKey(null));
// assertEquals(false, getMap().containsValue(null));
// assertEquals(null, getMap().remove(null));
// assertEquals(false, getMap().entrySet().contains(null));
// assertEquals(false, getMap().keySet().contains(null));
// assertEquals(false, getMap().values().contains(null));
// try {
// getMap().put(null, null);
// fail();
// } catch (final NullPointerException ex) {}
// try {
// getMap().put((K) new Object(), null);
// fail();
// } catch (final NullPointerException ex) {}
// try {
// getMap().put(null, (V) new Object());
// fail();
// } catch (final NullPointerException ex) {}
// }
//
// //-----------------------------------------------------------------------
///*
// // Tests often fail because gc is uncontrollable
//
// public void testPurge() {
// ReferenceIdentityMap map = new ReferenceIdentityMap(ReferenceIdentityMap.WEAK, ReferenceIdentityMap.WEAK);
// Object[] hard = new Object[10];
// for (int i = 0; i < hard.length; i++) {
// hard[i] = new Object();
// map.put(hard[i], new Object());
// }
// gc();
// assertTrue("map should be empty after purge of weak values", map.isEmpty());
//
// for (int i = 0; i < hard.length; i++) {
// map.put(new Object(), hard[i]);
// }
// gc();
// assertTrue("map should be empty after purge of weak keys", map.isEmpty());
//
// for (int i = 0; i < hard.length; i++) {
// map.put(new Object(), hard[i]);
// map.put(hard[i], new Object());
// }
//
// gc();
// assertTrue("map should be empty after purge of weak keys and values", map.isEmpty());
// }
//
//
// public void testGetAfterGC() {
// ReferenceIdentityMap map = new ReferenceIdentityMap(ReferenceIdentityMap.WEAK, ReferenceIdentityMap.WEAK);
// for (int i = 0; i < 10; i++) {
// map.put(Integer.valueOf(i), Integer.valueOf(i));
// }
//
// gc();
// for (int i = 0; i < 10; i++) {
// Integer I = Integer.valueOf(i);
// assertTrue("map.containsKey should return false for GC'd element", !map.containsKey(I));
// assertTrue("map.get should return null for GC'd element", map.get(I) == null);
// }
// }
//
//
// public void testEntrySetIteratorAfterGC() {
// ReferenceIdentityMap map = new ReferenceIdentityMap(ReferenceIdentityMap.WEAK, ReferenceIdentityMap.WEAK);
// Object[] hard = new Object[10];
// for (int i = 0; i < 10; i++) {
// hard[i] = Integer.valueOf(10 + i);
// map.put(Integer.valueOf(i), Integer.valueOf(i));
// map.put(hard[i], hard[i]);
// }
//
// gc();
// Iterator iterator = map.entrySet().iterator();
// while (iterator.hasNext()) {
// Map.Entry entry = (Map.Entry)iterator.next();
// Integer key = (Integer)entry.getKey();
// Integer value = (Integer)entry.getValue();
// assertTrue("iterator should skip GC'd keys", key.intValue() >= 10);
// assertTrue("iterator should skip GC'd values", value.intValue() >= 10);
// }
//
// }
//
// public void testMapIteratorAfterGC() {
// ReferenceIdentityMap map = new ReferenceIdentityMap(ReferenceIdentityMap.WEAK, ReferenceIdentityMap.WEAK);
// Object[] hard = new Object[10];
// for (int i = 0; i < 10; i++) {
// hard[i] = Integer.valueOf(10 + i);
// map.put(Integer.valueOf(i), Integer.valueOf(i));
// map.put(hard[i], hard[i]);
// }
//
// gc();
// MapIterator iterator = map.mapIterator();
// while (iterator.hasNext()) {
// Object key1 = iterator.next();
// Integer key = (Integer) iterator.getKey();
// Integer value = (Integer) iterator.getValue();
// assertTrue("iterator keys should match", key == key1);
// assertTrue("iterator should skip GC'd keys", key.intValue() >= 10);
// assertTrue("iterator should skip GC'd values", value.intValue() >= 10);
// }
//
// }
//
// public void testMapIteratorAfterGC2() {
// ReferenceIdentityMap map = new ReferenceIdentityMap(ReferenceIdentityMap.WEAK, ReferenceIdentityMap.WEAK);
// Object[] hard = new Object[10];
// for (int i = 0; i < 10; i++) {
// hard[i] = Integer.valueOf(10 + i);
// map.put(Integer.valueOf(i), Integer.valueOf(i));
// map.put(hard[i], hard[i]);
// }
//
// MapIterator iterator = map.mapIterator();
// while (iterator.hasNext()) {
// Object key1 = iterator.next();
// gc();
// Integer key = (Integer) iterator.getKey();
// Integer value = (Integer) iterator.getValue();
// assertTrue("iterator keys should match", key == key1);
// assertTrue("iterator should skip GC'd keys", key.intValue() >= 10);
// assertTrue("iterator should skip GC'd values", value.intValue() >= 10);
// }
//
// }
//*/
//
// WeakReference<K> keyReference;
// WeakReference<V> valueReference;
//
// @SuppressWarnings("unchecked")
// private Map<K, V> buildRefMap() {
// final K key = (K) new Object();
// final V value = (V) new Object();
//
// keyReference = new WeakReference<K>(key);
// valueReference = new WeakReference<V>(value);
//
// final Map<K, V> testMap = new ReferenceIdentityMap<K, V>(ReferenceStrength.WEAK, ReferenceStrength.HARD, true);
// testMap.put(key, value);
//
// assertEquals("In map", value, testMap.get(key));
// assertNotNull("Weak reference released early (1)", keyReference.get());
// assertNotNull("Weak reference released early (2)", valueReference.get());
// return testMap;
// }
//
// /**
// * Tests whether purge values setting works
// */
// public void testPurgeValues() throws Exception {
// // many thanks to Juozas Baliuka for suggesting this method
// final Map<K, V> testMap = buildRefMap();
//
// int iterations = 0;
// int bytz = 2;
// while (true) {
// System.gc();
// if (iterations++ > 50) {
// fail("Max iterations reached before resource released.");
// }
// testMap.isEmpty();
// if (keyReference.get() == null && valueReference.get() == null) {
// break;
//
// } else {
// // create garbage:
// @SuppressWarnings("unused")
// final byte[] b = new byte[bytz];
// bytz = bytz * 2;
// }
// }
// }
//
// @SuppressWarnings("unused")
// private static void gc() {
// try {
// // trigger GC
// final byte[][] tooLarge = new byte[1000000000][1000000000];
// fail("you have too much RAM");
// } catch (final OutOfMemoryError ex) {
// System.gc(); // ignore
// }
// }
//
//}