--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/util/concurrent/tck/MapTest.java Tue Oct 03 13:45:11 2017 -0700
@@ -0,0 +1,172 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * Written by Doug Lea and Martin Buchholz with assistance from
+ * members of JCP JSR-166 Expert Group and released to the public
+ * domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+import junit.framework.Test;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ThreadLocalRandom;
+
+/**
+ * Contains tests applicable to all Map implementations.
+ */
+public class MapTest extends JSR166TestCase {
+ final MapImplementation impl;
+
+ /** Tests are parameterized by a Map implementation. */
+ MapTest(MapImplementation impl, String methodName) {
+ super(methodName);
+ this.impl = impl;
+ }
+
+ public static Test testSuite(MapImplementation impl) {
+ return newTestSuite(
+ parameterizedTestSuite(MapTest.class,
+ MapImplementation.class,
+ impl));
+ }
+
+ public void testImplSanity() {
+ final ThreadLocalRandom rnd = ThreadLocalRandom.current();
+ {
+ Map m = impl.emptyMap();
+ assertTrue(m.isEmpty());
+ assertEquals(0, m.size());
+ Object k = impl.makeKey(rnd.nextInt());
+ Object v = impl.makeValue(rnd.nextInt());
+ m.put(k, v);
+ assertFalse(m.isEmpty());
+ assertEquals(1, m.size());
+ assertTrue(m.containsKey(k));
+ assertTrue(m.containsValue(v));
+ }
+ {
+ Map m = impl.emptyMap();
+ Object v = impl.makeValue(rnd.nextInt());
+ if (impl.permitsNullKeys()) {
+ m.put(null, v);
+ assertTrue(m.containsKey(null));
+ assertTrue(m.containsValue(v));
+ } else {
+ assertThrows(NullPointerException.class, () -> m.put(null, v));
+ }
+ }
+ {
+ Map m = impl.emptyMap();
+ Object k = impl.makeKey(rnd.nextInt());
+ if (impl.permitsNullValues()) {
+ m.put(k, null);
+ assertTrue(m.containsKey(k));
+ assertTrue(m.containsValue(null));
+ } else {
+ assertThrows(NullPointerException.class, () -> m.put(k, null));
+ }
+ }
+ {
+ Map m = impl.emptyMap();
+ Object k = impl.makeKey(rnd.nextInt());
+ Object v1 = impl.makeValue(rnd.nextInt());
+ Object v2 = impl.makeValue(rnd.nextInt());
+ m.put(k, v1);
+ if (impl.supportsSetValue()) {
+ ((Map.Entry)(m.entrySet().iterator().next())).setValue(v2);
+ assertSame(v2, m.get(k));
+ assertTrue(m.containsKey(k));
+ assertTrue(m.containsValue(v2));
+ assertFalse(m.containsValue(v1));
+ } else {
+ assertThrows(UnsupportedOperationException.class,
+ () -> ((Map.Entry)(m.entrySet().iterator().next())).setValue(v2));
+ }
+ }
+ }
+
+ /**
+ * Tests and extends the scenario reported in
+ * https://bugs.openjdk.java.net/browse/JDK-8186171
+ * HashMap: Entry.setValue may not work after Iterator.remove() called for previous entries
+ * ant -Djsr166.tckTestClass=HashMapTest -Djsr166.methodFilter=testBug8186171 -Djsr166.runsPerTest=1000 tck
+ */
+ public void testBug8186171() {
+ if (!impl.supportsSetValue()) return;
+ final ThreadLocalRandom rnd = ThreadLocalRandom.current();
+ final boolean permitsNullValues = impl.permitsNullValues();
+ final Object v1 = (permitsNullValues && rnd.nextBoolean())
+ ? null : impl.makeValue(1);
+ final Object v2 = (permitsNullValues && rnd.nextBoolean() && v1 != null)
+ ? null : impl.makeValue(2);
+
+ /** If true, always lands in first bucket in hash tables. */
+ final boolean poorHash = rnd.nextBoolean();
+ class Key implements Comparable<Key> {
+ final int i;
+ Key(int i) { this.i = i; }
+ public int hashCode() { return poorHash ? 0 : super.hashCode(); }
+ public int compareTo(Key x) {
+ return Integer.compare(this.i, x.i);
+ }
+ }
+
+ // Both HashMap and ConcurrentHashMap have:
+ // TREEIFY_THRESHOLD = 8; UNTREEIFY_THRESHOLD = 6;
+ final int size = rnd.nextInt(1, 25);
+
+ List<Key> keys = new ArrayList<>();
+ for (int i = size; i-->0; ) keys.add(new Key(i));
+ Key keyToFrob = keys.get(rnd.nextInt(keys.size()));
+
+ Map<Key, Object> m = impl.emptyMap();
+ for (Key key : keys) m.put(key, v1);
+
+ for (Iterator<Map.Entry<Key, Object>> it = m.entrySet().iterator();
+ it.hasNext(); ) {
+ Map.Entry<Key, Object> entry = it.next();
+ if (entry.getKey() == keyToFrob)
+ entry.setValue(v2); // does this have the expected effect?
+ else
+ it.remove();
+ }
+
+ assertFalse(m.containsValue(v1));
+ assertTrue(m.containsValue(v2));
+ assertTrue(m.containsKey(keyToFrob));
+ assertEquals(1, m.size());
+ }
+
+// public void testFailsIntentionallyForDebugging() {
+// fail(impl.klazz().getSimpleName());
+// }
+}