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third-party-mirror/openjdk/jdk25u/refs/heads/master/./test/jdk/java/util/Collection/MOAT.java
blob: e87b071d80a454e15d2ddc8560892d5179875d08 [file] [edit]
/*
* Copyright (c) 2005, 2025, Oracle and/or its affiliates. All rights reserved.
* 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.
*/
/*
* @test
* @bug 6207984 6272521 6192552 6269713 6197726 6260652 5073546 4137464
* 4155650 4216399 4294891 6282555 6318622 6355327 6383475 6420753
* 6431845 4802633 6570566 6570575 6570631 6570924 6691185 6691215
* 4802647 7123424 8024709 8193128 8327858
* @summary Run many tests on many Collection and Map implementations
* @author Martin Buchholz
* @modules java.base/java.util:open
* @enablePreview
* @run main MOAT
* @key randomness
*/
/* Mother Of All (Collection) Tests
*
* Testing of collection classes is often spotty, because many tests
* need to be performed on many implementations, but the onus on
* writing the tests falls on the engineer introducing the new
* implementation.
*
* The idea of this mega-test is that:
*
* An engineer adding a new collection implementation could simply add
* their new implementation to a list of implementations in this
* test's main method. Any general purpose Collection<Integer> or
* Map<Integer,Integer> class is appropriate.
*
* An engineer fixing a regression could add their regression test here and
* simultaneously test all other implementations.
*/
import java.io.*;
import java.util.*;
import java.util.concurrent.*;
import static java.util.Collections.*;
import java.lang.reflect.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class MOAT {
// Collections under test must not be initialized to contain this value,
// and maps under test must not contain this value as a key.
// It's used as a sentinel for absent-element testing.
static final int ABSENT_VALUE = 778347983;
static final Integer[] integerArray;
static {
Integer[] ia = new Integer[20];
// fill with 1..20 inclusive
for (int i = 0; i < ia.length; i++) {
ia[i] = i + 1;
}
integerArray = ia;
}
public static void realMain(String[] args) {
testCollection(new NewAbstractCollection<Integer>());
testCollection(new NewAbstractSet<Integer>());
testCollection(new LinkedHashSet<Integer>());
testCollection(new HashSet<Integer>());
testCollection(new Vector<Integer>());
testCollection(new Vector<Integer>().subList(0,0));
testCollection(new ArrayDeque<Integer>());
testCollection(new ArrayList<Integer>());
testCollection(new ArrayList<Integer>().subList(0,0));
testCollection(new LinkedList<Integer>());
testCollection(new LinkedList<Integer>().subList(0,0));
testCollection(new TreeSet<Integer>());
testCollection(Collections.checkedList(new ArrayList<Integer>(), Integer.class));
testCollection(Collections.synchronizedList(new ArrayList<Integer>()));
testCollection(Collections.checkedSet(new HashSet<Integer>(), Integer.class));
testCollection(Collections.checkedSortedSet(new TreeSet<Integer>(), Integer.class));
testCollection(Collections.checkedNavigableSet(new TreeSet<Integer>(), Integer.class));
testCollection(Collections.synchronizedSet(new HashSet<Integer>()));
testCollection(Collections.synchronizedSortedSet(new TreeSet<Integer>()));
testCollection(Collections.synchronizedNavigableSet(new TreeSet<Integer>()));
testCollection(new CopyOnWriteArrayList<Integer>());
testCollection(new CopyOnWriteArrayList<Integer>().subList(0,0));
testCollection(new CopyOnWriteArraySet<Integer>());
testCollection(new PriorityQueue<Integer>());
testCollection(new PriorityBlockingQueue<Integer>());
testCollection(new ArrayBlockingQueue<Integer>(20));
testCollection(new LinkedBlockingQueue<Integer>(20));
testCollection(new LinkedBlockingDeque<Integer>(20));
testCollection(new ConcurrentLinkedDeque<Integer>());
testCollection(new ConcurrentLinkedQueue<Integer>());
testCollection(new LinkedTransferQueue<Integer>());
testCollection(new ConcurrentSkipListSet<Integer>());
testCollection(Arrays.asList(new Integer(42)));
testCollection(Arrays.asList(1,2,3));
testCollection(nCopies(25,1));
testImmutableList(nCopies(25,1));
testMap(new HashMap<Integer,Integer>());
testMap(new LinkedHashMap<Integer,Integer>());
// TODO: Add reliable support for WeakHashMap.
// This test is subject to very rare failures because the GC
// may remove unreferenced-keys from the map at any time.
// testMap(new WeakHashMap<Integer,Integer>());
testMap(new IdentityHashMap<Integer,Integer>());
testMap(new TreeMap<Integer,Integer>());
testMap(new Hashtable<Integer,Integer>());
testMap(new ConcurrentHashMap<Integer,Integer>(10, 0.5f));
testMap(new ConcurrentSkipListMap<Integer,Integer>());
testMap(Collections.checkedMap(new HashMap<Integer,Integer>(), Integer.class, Integer.class));
testMap(Collections.checkedSortedMap(new TreeMap<Integer,Integer>(), Integer.class, Integer.class));
testMap(Collections.checkedNavigableMap(new TreeMap<Integer,Integer>(), Integer.class, Integer.class));
testMap(Collections.synchronizedMap(new HashMap<Integer,Integer>()));
testMap(Collections.synchronizedSortedMap(new TreeMap<Integer,Integer>()));
testMap(Collections.synchronizedNavigableMap(new TreeMap<Integer,Integer>()));
// Unmodifiable wrappers
testImmutableSet(unmodifiableSet(new HashSet<>(Arrays.asList(1,2,3))), 99);
testImmutableSet(AccessFlag.maskToAccessFlags(0, AccessFlag.Location.CLASS), AccessFlag.ABSTRACT);
testImmutableSet(AccessFlag.maskToAccessFlags(Modifier.PUBLIC | Modifier.STATIC | Modifier.SYNCHRONIZED, AccessFlag.Location.METHOD), AccessFlag.ABSTRACT);
testImmutableList(unmodifiableList(Arrays.asList(1,2,3)));
testImmutableMap(unmodifiableMap(Collections.singletonMap(1,2)));
testImmutableSeqColl(unmodifiableSequencedCollection(Arrays.asList(1,2,3)), 99);
testImmutableSeqColl(unmodifiableSequencedSet(new LinkedHashSet<>(Arrays.asList(1,2,3))), 99);
var lhm = new LinkedHashMap<Integer,Integer>(); lhm.put(1,2); lhm.put(3, 4);
testImmutableSeqMap(unmodifiableSequencedMap(lhm));
testCollMutatorsAlwaysThrow(unmodifiableSet(new HashSet<>(Arrays.asList(1,2,3))));
testCollMutatorsAlwaysThrow(unmodifiableSet(Collections.emptySet()));
testEmptyCollMutatorsAlwaysThrow(unmodifiableSet(Collections.emptySet()));
testListMutatorsAlwaysThrow(unmodifiableList(Arrays.asList(1,2,3)));
testListMutatorsAlwaysThrow(unmodifiableList(Collections.emptyList()));
testEmptyListMutatorsAlwaysThrow(unmodifiableList(Collections.emptyList()));
testMapMutatorsAlwaysThrow(unmodifiableMap(Collections.singletonMap(1,2)));
testMapMutatorsAlwaysThrow(unmodifiableMap(Collections.emptyMap()));
testEmptyMapMutatorsAlwaysThrow(unmodifiableMap(Collections.emptyMap()));
// Empty collections
final List<Integer> emptyArray = Arrays.asList(new Integer[]{});
testCollection(emptyArray);
testEmptyList(emptyArray);
THROWS(IndexOutOfBoundsException.class, () -> emptyArray.set(0,1));
THROWS(UnsupportedOperationException.class, () -> emptyArray.add(0,1));
List<Integer> noOne = nCopies(0,1);
testCollection(noOne);
testEmptyList(noOne);
testImmutableList(noOne);
Set<Integer> emptySet = emptySet();
testCollection(emptySet);
testEmptySet(emptySet);
testEmptySet(EMPTY_SET);
testEmptySet(Collections.emptySet());
testEmptySet(Collections.emptySortedSet());
testEmptySet(Collections.emptyNavigableSet());
testImmutableSet(emptySet, 99);
List<Integer> emptyList = emptyList();
testCollection(emptyList);
testEmptyList(emptyList);
testEmptyList(EMPTY_LIST);
testEmptyList(Collections.emptyList());
testImmutableList(emptyList);
Map<Integer,Integer> emptyMap = emptyMap();
testMap(emptyMap);
testEmptyMap(emptyMap);
testEmptyMap(EMPTY_MAP);
testEmptyMap(Collections.emptyMap());
testEmptyMap(Collections.emptySortedMap());
testEmptyMap(Collections.emptyNavigableMap());
testImmutableMap(emptyMap);
testImmutableMap(Collections.emptyMap());
testImmutableMap(Collections.emptySortedMap());
testImmutableMap(Collections.emptyNavigableMap());
// Singleton collections
Set<Integer> singletonSet = singleton(1);
equal(singletonSet.size(), 1);
testCollection(singletonSet);
testImmutableSet(singletonSet, 99);
List<Integer> singletonList = singletonList(1);
equal(singletonList.size(), 1);
testCollection(singletonList);
testImmutableList(singletonList);
testImmutableList(singletonList.subList(0,1));
testImmutableList(singletonList.subList(0,1).subList(0,1));
testEmptyList(singletonList.subList(0,0));
testEmptyList(singletonList.subList(0,0).subList(0,0));
Map<Integer,Integer> singletonMap = singletonMap(1,2);
equal(singletonMap.size(), 1);
testMap(singletonMap);
testImmutableMap(singletonMap);
// Immutable List
testEmptyList(List.of());
testEmptyList(List.of().subList(0,0));
testEmptyList(StableValue.list(0, i -> i));
testEmptyList(StableValue.list(3, i -> i).subList(0, 0));
testListMutatorsAlwaysThrow(List.of());
testListMutatorsAlwaysThrow(List.<Integer>of().subList(0,0));
testListMutatorsAlwaysThrow(StableValue.list(0, i -> i));
testEmptyListMutatorsAlwaysThrow(List.of());
testEmptyListMutatorsAlwaysThrow(List.<Integer>of().subList(0,0));
testEmptyListMutatorsAlwaysThrow(StableValue.list(0, i -> i));
testEmptyListMutatorsAlwaysThrow(StableValue.list(3, i -> i).subList(0, 0));
for (List<Integer> list : Arrays.asList(
List.<Integer>of(),
List.of(1),
List.of(1, 2),
List.of(1, 2, 3),
List.of(1, 2, 3, 4),
List.of(1, 2, 3, 4, 5),
List.of(1, 2, 3, 4, 5, 6),
List.of(1, 2, 3, 4, 5, 6, 7),
List.of(1, 2, 3, 4, 5, 6, 7, 8),
List.of(1, 2, 3, 4, 5, 6, 7, 8, 9),
List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10),
List.of(integerArray),
Stream.<Integer>empty().toList(),
Stream.of(1).toList(),
Stream.of(1, 2).toList(),
Stream.of(1, 2, 3).toList(),
Stream.of(1, 2, 3, 4).toList(),
Stream.of((Integer)null).toList(),
Stream.of(1, null).toList(),
Stream.of(1, null, 3).toList(),
Stream.of(1, null, 3, 4).toList(),
StableValue.list(0, i -> i),
StableValue.list(3, i -> i),
StableValue.list(10, i -> i))) {
testCollection(list);
testImmutableList(list);
testListMutatorsAlwaysThrow(list);
testImmutableListMutatorsAlwaysThrow(list);
if (list.size() >= 1) {
// test subLists
List<Integer> headList = list.subList(0, list.size() - 1);
List<Integer> tailList = list.subList(1, list.size());
testCollection(headList);
testCollection(tailList);
testImmutableList(headList);
testImmutableList(tailList);
testListMutatorsAlwaysThrow(headList);
testListMutatorsAlwaysThrow(tailList);
}
}
List<Integer> listCopy = List.copyOf(Arrays.asList(1, 2, 3));
testCollection(listCopy);
testImmutableList(listCopy);
testListMutatorsAlwaysThrow(listCopy);
List<Integer> listCollected = Stream.of(1, 2, 3).collect(Collectors.toUnmodifiableList());
equal(listCollected, List.of(1, 2, 3));
testCollection(listCollected);
testImmutableList(listCollected);
testListMutatorsAlwaysThrow(listCollected);
// List indexOf / lastIndexOf
// 0 element
System.out.println("testListIndexOf size 0");
testListIndexOf(-1, -1);
System.out.println("testListIndexOf size 1");
testListIndexOf(-1, -1, 0);
testListIndexOf(0, 0, 1);
System.out.println("testListIndexOf size 2");
testListIndexOf(-1, -1, 0, 0);
testListIndexOf(0, 0, 1, 0);
testListIndexOf(0, 1, 1, 1);
testListIndexOf(1, 1, 0, 1);
System.out.println("testListIndexOf size 3");
testListIndexOf(-1, -1, 0, 0, 0);
testListIndexOf(0, 0, 1, 0, 0);
testListIndexOf(0, 1, 1, 1, 0);
testListIndexOf(1, 2, 0, 1, 1);
testListIndexOf(2, 2, 0, 0, 1);
System.out.println("testListIndexOf size N");
testListIndexOf(-1, -1, 0, 0, 0, 0, 0, 0, 0);
testListIndexOf(2, 6, 0, 0, 1, 0, 1, 0, 1);
testListIndexOf(4, 4, 0, 0, 0, 0, 1, 0, 0);
testListIndexOf(0, 6, 1, 1, 1, 1, 1, 1, 1);
testListIndexOf(0, 7, 1, 1, 1, 1, 1, 1, 1, 1);
testListIndexOf(0, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1);
testListIndexOf(0, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
testListIndexOf(0, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
testListIndexOf(0, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
testListIndexOf(0, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
testListIndexOf(12, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1);
testListIndexOf(-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
// Immutable Set
testEmptySet(Set.of());
testCollMutatorsAlwaysThrow(Set.of());
testEmptyCollMutatorsAlwaysThrow(Set.of());
for (Set<Integer> set : Arrays.asList(
Set.<Integer>of(),
Set.of(1),
Set.of(1, 2),
Set.of(1, 2, 3),
Set.of(1, 2, 3, 4),
Set.of(1, 2, 3, 4, 5),
Set.of(1, 2, 3, 4, 5, 6),
Set.of(1, 2, 3, 4, 5, 6, 7),
Set.of(1, 2, 3, 4, 5, 6, 7, 8),
Set.of(1, 2, 3, 4, 5, 6, 7, 8, 9),
Set.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10),
Set.of(integerArray))) {
testCollection(set);
testImmutableSet(set, 99);
testCollMutatorsAlwaysThrow(set);
}
Set<Integer> setCopy = Set.copyOf(Arrays.asList(1, 2, 3));
testCollection(setCopy);
testImmutableSet(setCopy, 99);
testCollMutatorsAlwaysThrow(setCopy);
Set<Integer> setCollected = Stream.of(1, 1, 2, 3, 2, 3)
.collect(Collectors.toUnmodifiableSet());
equal(setCollected, Set.of(1, 2, 3));
testCollection(setCollected);
testImmutableSet(setCollected, 99);
testCollMutatorsAlwaysThrow(setCollected);
// Immutable Map
@SuppressWarnings("unchecked")
Map.Entry<Integer,Integer>[] ea = (Map.Entry<Integer,Integer>[])new Map.Entry<?,?>[20];
for (int i = 0; i < ea.length; i++) {
ea[i] = Map.entry(i+1, i+101);
}
testEmptyMap(Map.of());
testMapMutatorsAlwaysThrow(Map.of());
testEmptyMapMutatorsAlwaysThrow(Map.of());
testEmptyMap(StableValue.map(Set.of(), k -> k));
testMapMutatorsAlwaysThrow(StableValue.map(Set.of(), k -> k));
testEmptyMapMutatorsAlwaysThrow(StableValue.map(Set.of(), k -> k));
for (Map<Integer,Integer> map : Arrays.asList(
Map.<Integer,Integer>of(),
Map.of(1, 101),
Map.of(1, 101, 2, 202),
Map.of(1, 101, 2, 202, 3, 303),
Map.of(1, 101, 2, 202, 3, 303, 4, 404),
Map.of(1, 101, 2, 202, 3, 303, 4, 404, 5, 505),
Map.of(1, 101, 2, 202, 3, 303, 4, 404, 5, 505, 6, 606),
Map.of(1, 101, 2, 202, 3, 303, 4, 404, 5, 505, 6, 606, 7, 707),
Map.of(1, 101, 2, 202, 3, 303, 4, 404, 5, 505, 6, 606, 7, 707, 8, 808),
Map.of(1, 101, 2, 202, 3, 303, 4, 404, 5, 505, 6, 606, 7, 707, 8, 808, 9, 909),
Map.of(1, 101, 2, 202, 3, 303, 4, 404, 5, 505, 6, 606, 7, 707, 8, 808, 9, 909, 10, 1010),
Map.ofEntries(ea),
StableValue.map(Set.<Integer>of(), k -> k),
StableValue.map(Set.of(1), k -> k),
StableValue.map(Set.of(1, 2, 3), k -> k))) {
testMap(map);
testImmutableMap(map);
testMapMutatorsAlwaysThrow(map);
}
Map<Integer,Integer> mapCopy = Map.copyOf(new HashMap<>(Map.of(1, 101, 2, 202, 3, 303)));
testMap(mapCopy);
testImmutableMap(mapCopy);
testMapMutatorsAlwaysThrow(mapCopy);
Map<Integer,Integer> mapCollected1 =
Stream.of(1, 2, 3)
.collect(Collectors.toUnmodifiableMap(i -> i, i -> 101 * i));
equal(mapCollected1, Map.of(1, 101, 2, 202, 3, 303));
testMap(mapCollected1);
testImmutableMap(mapCollected1);
testMapMutatorsAlwaysThrow(mapCollected1);
try {
Stream.of(1, 1, 2, 3, 2, 3)
.collect(Collectors.toUnmodifiableMap(i -> i, i -> 101 * i));
fail("duplicates should have thrown an exception");
} catch (IllegalStateException ise) {
pass();
}
Map<Integer,Integer> mapCollected2 =
Stream.of(1, 1, 2, 3, 2, 3)
.collect(Collectors.toUnmodifiableMap(i -> i, i -> 101 * i, Integer::sum));
equal(mapCollected2, Map.of(1, 202, 2, 404, 3, 606));
testMap(mapCollected2);
testImmutableMap(mapCollected2);
testMapMutatorsAlwaysThrow(mapCollected2);
}
private static void checkContainsSelf(Collection<Integer> c) {
check(c.containsAll(c));
check(c.containsAll(Arrays.asList(c.toArray())));
check(c.containsAll(Arrays.asList(c.toArray(new Integer[0]))));
}
private static void checkContainsEmpty(Collection<Integer> c) {
check(c.containsAll(new ArrayList<Integer>()));
}
private static void checkUnique(Set<Integer> s) {
for (Integer i : s) {
int count = 0;
for (Integer j : s) {
if (Objects.equals(i,j))
++count;
}
check(count == 1);
}
}
private static <T> void testEmptyCollection(Collection<T> c) {
check(c.isEmpty());
equal(c.size(), 0);
equal(c.toString(),"[]");
equal(c.toArray().length, 0);
equal(c.toArray(new Object[0]).length, 0);
equal(c.toArray(Object[]::new).length, 0);
check(c.toArray(new Object[]{42})[0] == null);
Object[] a = new Object[1]; a[0] = Boolean.TRUE;
equal(c.toArray(a), a);
equal(a[0], null);
testEmptyIterator(c.iterator());
}
static <T> void testEmptyIterator(final Iterator<T> it) {
if (rnd.nextBoolean())
check(! it.hasNext());
THROWS(NoSuchElementException.class, () -> it.next());
try { it.remove(); }
catch (IllegalStateException ignored) { pass(); }
catch (UnsupportedOperationException ignored) { pass(); }
catch (Throwable t) { unexpected(t); }
if (rnd.nextBoolean())
check(! it.hasNext());
}
private static void testEmptyList(List<?> c) {
testEmptyCollection(c);
equal(c.hashCode(), 1);
equal2(c, Collections.<Integer>emptyList());
}
private static <T> void testEmptySet(Set<T> c) {
testEmptyCollection(c);
equal(c.hashCode(), 0);
equal2(c, Collections.<Integer>emptySet());
if (c instanceof NavigableSet<?>)
testEmptyIterator(((NavigableSet<T>)c).descendingIterator());
}
private static <T> void testImmutableCollection(final Collection<T> c, T t) {
THROWS(UnsupportedOperationException.class,
() -> c.add(t),
() -> c.addAll(singleton(t)));
if (! c.isEmpty()) {
final T first = c.iterator().next();
THROWS(UnsupportedOperationException.class,
() -> c.clear(),
() -> c.remove(first),
() -> c.removeAll(singleton(first)),
() -> c.retainAll(emptyList()));
} else {
testEmptyIterator(c.iterator());
}
testForEachMatch(c);
testSpliteratorMatch(c);
}
private static <T> void testImmutableSeqColl(final SequencedCollection<T> c, T t) {
SequencedCollection<T> r = c.reversed();
testImmutableCollection(c, t);
testImmutableCollection(r, t);
THROWS(UnsupportedOperationException.class,
() -> c.addFirst(t),
() -> c.addLast(t),
() -> r.addFirst(t),
() -> r.addLast(t));
if (! c.isEmpty()) {
THROWS(UnsupportedOperationException.class,
() -> c.removeFirst(),
() -> c.removeLast(),
() -> r.removeFirst(),
() -> r.removeLast());
}
}
private static <T> void testImmutableSet(final Set<T> c, T t) {
testImmutableCollection(c, t);
}
private static <T> void testImmutableSeqSet(final SequencedSet<T> c, T t) {
testImmutableSeqColl(c, t);
}
private static void testImmutableList(final List<Integer> c) {
testList(c);
testImmutableCollection(c, 42);
testImmutableSeqColl(c, 42);
THROWS(UnsupportedOperationException.class,
() -> c.set(0,42),
() -> c.add(0,42),
() -> c.addAll(0,singleton(86)));
if (! c.isEmpty())
THROWS(UnsupportedOperationException.class,
() -> { Iterator<Integer> it = c.iterator();
it.next();
it.remove(); },
() -> { ListIterator<Integer> it = c.listIterator();
it.next();
it.remove(); });
}
/**
* Test that calling a mutator always throws UOE, even if the mutator
* wouldn't actually do anything, given its arguments.
*
* @param c the collection instance to test
*/
private static void testCollMutatorsAlwaysThrow(Collection<Integer> c) {
THROWS(UnsupportedOperationException.class,
() -> c.addAll(Collections.emptyList()),
() -> c.remove(ABSENT_VALUE),
() -> c.removeAll(Collections.emptyList()),
() -> c.removeIf(x -> false),
() -> c.retainAll(c));
}
// Ensures forEach supplies in the same order as the iterator
private static <T> void testForEachMatch(Collection<T> c) {
var itr = c.iterator();
int[] index = {0};
c.forEach(item -> {
T itrNext = null;
if (!itr.hasNext() || !Objects.equals(itrNext = itr.next(), item)) {
fail("forEach and iterator mismatch at " + index[0] + " forEach: " + item + ", itr: " + itrNext);
}
index[0]++;
});
if (itr.hasNext()) {
fail("forEach and iterator mismatch at tail, extras in itr");
}
}
// Ensures spliterator returns in the same order as the iterator
private static <T> void testSpliteratorMatch(Collection<T> c) {
var itr = c.iterator();
var split = c.spliterator();
int[] index = {0};
split.forEachRemaining(item -> {
T itrNext = null;
if (!itr.hasNext() || !Objects.equals(itrNext = itr.next(), item)) {
fail("iterator and spliterator mismatch at " + index[0] + " spliterator: " + item + ", itr: " + itrNext);
}
index[0]++;
});
if (itr.hasNext()) {
fail("iterator and spliterator mismatch at tail, extra item in itr");
}
}
/**
* Test that calling a mutator always throws UOE, even if the mutator
* wouldn't actually do anything on an empty collection.
*
* @param c the collection instance to test, must be empty
*/
private static void testEmptyCollMutatorsAlwaysThrow(Collection<Integer> c) {
if (! c.isEmpty()) {
fail("collection is not empty");
}
THROWS(UnsupportedOperationException.class,
() -> c.clear());
}
/**
* As above, for a list.
*
* @param c the list instance to test
*/
private static void testListMutatorsAlwaysThrow(List<Integer> c) {
testCollMutatorsAlwaysThrow(c);
THROWS(UnsupportedOperationException.class,
() -> c.addAll(0, Collections.emptyList()));
}
private static void testImmutableListMutatorsAlwaysThrow(List<Integer> c) {
THROWS(UnsupportedOperationException.class,
c::removeFirst,
c::removeLast);
}
/**
* As above, for an empty list.
*
* @param c the list instance to test, must be empty
*/
private static void testEmptyListMutatorsAlwaysThrow(List<Integer> c) {
if (! c.isEmpty()) {
fail("list is not empty");
}
testEmptyCollMutatorsAlwaysThrow(c);
THROWS(UnsupportedOperationException.class,
() -> c.replaceAll(x -> x),
() -> c.sort(null));
}
/**
* As above, for a map.
*
* @param m the map instance to test
*/
private static void testMapMutatorsAlwaysThrow(Map<Integer,Integer> m) {
THROWS(UnsupportedOperationException.class,
() -> m.compute(ABSENT_VALUE, (k, v) -> null),
() -> m.computeIfAbsent(ABSENT_VALUE, k -> null),
() -> m.computeIfPresent(ABSENT_VALUE, (k, v) -> null),
() -> m.merge(ABSENT_VALUE, 0, (k, v) -> null),
() -> m.putAll(Collections.emptyMap()),
() -> m.remove(ABSENT_VALUE),
() -> m.remove(ABSENT_VALUE, 0),
() -> m.replace(ABSENT_VALUE, 0),
() -> m.replace(ABSENT_VALUE, 0, 1));
}
/**
* As above, for an empty map.
*
* @param map the map instance to test, must be empty
*/
private static void testEmptyMapMutatorsAlwaysThrow(Map<Integer,Integer> m) {
if (! m.isEmpty()) {
fail("map is not empty");
}
THROWS(UnsupportedOperationException.class,
() -> m.clear(),
() -> m.replaceAll((k, v) -> v));
}
private static void clear(Collection<Integer> c) {
try { c.clear(); }
catch (Throwable t) { unexpected(t); }
testEmptyCollection(c);
}
private static <K,V> void testEmptyMap(final Map<K,V> m) {
check(m.isEmpty());
equal(m.size(), 0);
equal(m.toString(),"{}");
testEmptySet(m.keySet());
testEmptySet(m.entrySet());
testEmptyCollection(m.values());
try { check(! m.containsValue(null)); }
catch (NullPointerException ignored) { /* OK */ }
try { check(! m.containsKey(null)); }
catch (NullPointerException ignored) { /* OK */ }
check(! m.containsValue(1));
check(! m.containsKey(1));
}
private static void testImmutableMapEntry(final Map.Entry<Integer,Integer> me) {
Integer key = me.getKey();
Integer val = me.getValue();
THROWS(UnsupportedOperationException.class,
() -> me.setValue(3));
equal(key, me.getKey());
equal(val, me.getValue());
}
private static void testImmutableMap(final Map<Integer,Integer> m) {
THROWS(UnsupportedOperationException.class,
() -> m.put(1,1),
() -> m.putAll(singletonMap(1,1)));
if (! m.isEmpty()) {
final Integer first = m.keySet().iterator().next();
THROWS(UnsupportedOperationException.class,
() -> m.remove(first),
() -> m.clear());
testImmutableMapEntry(m.entrySet().iterator().next());
}
testImmutableSet(m.keySet(), 99);
testImmutableCollection(m.values(), 99);
testImmutableSet(m.entrySet(), Map.entry(42, 43));
}
private static void testImmutableSeqMap(final SequencedMap<Integer,Integer> m) {
SequencedMap<Integer,Integer> r = m.reversed();
testImmutableMap(m);
testImmutableMap(r);
THROWS(UnsupportedOperationException.class,
() -> m.putFirst(0, 0),
() -> m.putLast(0, 0),
() -> r.putFirst(0, 0),
() -> r.putLast(0, 0));
if (! m.isEmpty()) {
THROWS(UnsupportedOperationException.class,
() -> m.pollFirstEntry(),
() -> m.pollLastEntry(),
() -> r.pollFirstEntry(),
() -> r.pollLastEntry());
testImmutableMapEntry(m.sequencedEntrySet().getFirst());
testImmutableMapEntry(r.sequencedEntrySet().getFirst());
testImmutableMapEntry(m.sequencedEntrySet().reversed().getFirst());
testImmutableMapEntry(r.sequencedEntrySet().reversed().getFirst());
}
testImmutableSeqSet(m.sequencedKeySet(), 99);
testImmutableSeqColl(m.sequencedValues(), 99);
testImmutableSeqSet(m.sequencedEntrySet(), Map.entry(42, 43));
testImmutableSeqSet(r.sequencedKeySet(), 99);
testImmutableSeqColl(r.sequencedValues(), 99);
testImmutableSeqSet(r.sequencedEntrySet(), Map.entry(42, 43));
}
private static void clear(Map<?,?> m) {
try { m.clear(); }
catch (Throwable t) { unexpected(t); }
testEmptyMap(m);
}
private static void oneElement(Collection<Integer> c) {
clear(c);
try {
check(c.add(-42));
equal(c.toString(), "[-42]");
if (c instanceof Set) check(! c.add(-42));
} catch (Throwable t) { unexpected(t); }
check(! c.isEmpty()); check(c.size() == 1);
}
private static boolean supportsAdd(Collection<Integer> c) {
try { check(c.add(ABSENT_VALUE)); }
catch (UnsupportedOperationException t) { return false; }
catch (Throwable t) { unexpected(t); }
try {
check(c.contains(ABSENT_VALUE));
check(c.remove(ABSENT_VALUE));
} catch (Throwable t) { unexpected(t); }
return true;
}
private static boolean supportsRemove(Collection<Integer> c) {
try { check(! c.remove(ABSENT_VALUE)); }
catch (UnsupportedOperationException t) { return false; }
catch (Throwable t) { unexpected(t); }
return true;
}
// 6260652: (coll) Arrays.asList(x).toArray().getClass()
// should be Object[].class
// Fixed in jdk9, but not jdk8 ...
static final boolean needToWorkAround6260652 =
Arrays.asList("").toArray().getClass() != Object[].class;
private static void checkFunctionalInvariants(Collection<Integer> c) {
try {
checkContainsSelf(c);
checkContainsEmpty(c);
check(c.size() != 0 ^ c.isEmpty());
check(! c.contains(ABSENT_VALUE));
{
int size = 0;
for (Integer i : c) size++;
check(c.size() == size);
}
if (c instanceof Set) {
checkUnique((Set<Integer>)c);
}
check(c.toArray().length == c.size());
check(c.toArray().getClass() == Object[].class
||
(needToWorkAround6260652 &&
c.getClass().getName().equals("java.util.Arrays$ArrayList")));
for (int size : new int[]{0,1,c.size(), c.size()+1}) {
Integer[] a = c.toArray(new Integer[size]);
check((size > c.size()) || a.length == c.size());
int i = 0; for (Integer j : c) check(a[i++] == j);
check((size <= c.size()) || (a[c.size()] == null));
check(a.getClass() == Integer[].class);
}
{
Integer[] a = c.toArray(Integer[]::new);
equal(c.size(), a.length);
check(a.getClass() == Integer[].class);
check(Arrays.equals(c.toArray(new Integer[0]), a));
}
check(c.equals(c));
if (c instanceof Serializable) {
//System.out.printf("Serializing %s%n", c.getClass().getName());
try {
Object clone = serialClone(c);
equal(c instanceof Serializable,
clone instanceof Serializable);
equal(c instanceof RandomAccess,
clone instanceof RandomAccess);
if ((c instanceof List) || (c instanceof Set))
equal(c, clone);
else
equal(new HashSet<Integer>(c),
new HashSet<Integer>(serialClone(c)));
} catch (Error xxx) {
if (! (xxx.getCause() instanceof NotSerializableException))
throw xxx;
}
}
}
catch (Throwable t) { unexpected(t); }
}
//----------------------------------------------------------------
// If add(null) succeeds, contains(null) & remove(null) should succeed
//----------------------------------------------------------------
private static void testNullElement(Collection<Integer> c) {
try {
check(c.add(null));
if (c.size() == 1)
equal(c.toString(), "[null]");
try {
checkFunctionalInvariants(c);
check(c.contains(null));
check(c.remove(null));
}
catch (Throwable t) { unexpected(t); }
}
catch (NullPointerException e) { /* OK */ }
catch (Throwable t) { unexpected(t); }
}
//----------------------------------------------------------------
// If add("x") succeeds, contains("x") & remove("x") should succeed
//----------------------------------------------------------------
@SuppressWarnings("unchecked")
private static void testStringElement(Collection<Integer> c) {
Collection x = (Collection)c; // Make type-unsafe
try {
check(x.add("x"));
try {
check(x.contains("x"));
check(x.remove("x"));
} catch (Throwable t) { unexpected(t); }
}
catch (ClassCastException e) { /* OK */ }
catch (Throwable t) { unexpected(t); }
}
private static void testConcurrentCollection(Collection<Integer> c) {
try {
c.add(1);
Iterator<Integer> it = c.iterator();
check(it.hasNext());
clear(c);
check(it.next() instanceof Integer); // No CME
check(c.isEmpty());
}
catch (Throwable t) { unexpected(t); }
}
private static void testQueue(Queue<Integer> q) {
q.clear();
for (int i = 0; i < 5; i++) {
testQueueAddRemove(q, null);
testQueueAddRemove(q, 537);
q.add(i);
}
equal(q.size(), 5);
checkFunctionalInvariants(q);
q.poll();
equal(q.size(), 4);
checkFunctionalInvariants(q);
if ((q instanceof LinkedBlockingQueue) ||
(q instanceof LinkedBlockingDeque) ||
(q instanceof ConcurrentLinkedDeque) ||
(q instanceof ConcurrentLinkedQueue)) {
testQueueIteratorRemove(q);
}
}
private static void testQueueAddRemove(final Queue<Integer> q,
final Integer e) {
final List<Integer> originalContents = new ArrayList<>(q);
final boolean isEmpty = q.isEmpty();
final boolean isList = (q instanceof List);
final List asList = isList ? (List) q : null;
check(!q.contains(e));
try {
q.add(e);
} catch (NullPointerException npe) {
check(e == null);
return; // Null elements not supported
}
check(q.contains(e));
check(q.remove(e));
check(!q.contains(e));
equal(new ArrayList<Integer>(q), originalContents);
if (q instanceof Deque<?>) {
final Deque<Integer> deq = (Deque<Integer>) q;
final List<Integer> singleton = Collections.singletonList(e);
// insert, query, remove element at head
if (isEmpty) {
THROWS(NoSuchElementException.class,
() -> deq.getFirst(),
() -> deq.element(),
() -> deq.iterator().next());
check(deq.peekFirst() == null);
check(deq.peek() == null);
} else {
check(deq.getFirst() != e);
check(deq.element() != e);
check(deq.iterator().next() != e);
check(deq.peekFirst() != e);
check(deq.peek() != e);
}
check(!deq.contains(e));
check(!deq.removeFirstOccurrence(e));
check(!deq.removeLastOccurrence(e));
if (isList) {
check(asList.indexOf(e) == -1);
check(asList.lastIndexOf(e) == -1);
}
switch (rnd.nextInt(isList ? 4 : 3)) {
case 0: deq.addFirst(e); break;
case 1: check(deq.offerFirst(e)); break;
case 2: deq.push(e); break;
case 3: asList.add(0, e); break;
default: throw new AssertionError();
}
check(deq.peekFirst() == e);
check(deq.getFirst() == e);
check(deq.element() == e);
check(deq.peek() == e);
check(deq.iterator().next() == e);
check(deq.contains(e));
if (isList) {
check(asList.get(0) == e);
check(asList.indexOf(e) == 0);
check(asList.lastIndexOf(e) == 0);
check(asList.subList(0, 1).equals(singleton));
}
switch (rnd.nextInt(isList ? 11 : 9)) {
case 0: check(deq.pollFirst() == e); break;
case 1: check(deq.removeFirst() == e); break;
case 2: check(deq.remove() == e); break;
case 3: check(deq.pop() == e); break;
case 4: check(deq.removeFirstOccurrence(e)); break;
case 5: check(deq.removeLastOccurrence(e)); break;
case 6: check(deq.remove(e)); break;
case 7: check(deq.removeAll(singleton)); break;
case 8: Iterator it = deq.iterator(); it.next(); it.remove(); break;
case 9: asList.remove(0); break;
case 10: asList.subList(0, 1).clear(); break;
default: throw new AssertionError();
}
if (isEmpty) {
THROWS(NoSuchElementException.class,
() -> deq.getFirst(),
() -> deq.element(),
() -> deq.iterator().next());
check(deq.peekFirst() == null);
check(deq.peek() == null);
} else {
check(deq.getFirst() != e);
check(deq.element() != e);
check(deq.iterator().next() != e);
check(deq.peekFirst() != e);
check(deq.peek() != e);
}
check(!deq.contains(e));
check(!deq.removeFirstOccurrence(e));
check(!deq.removeLastOccurrence(e));
if (isList) {
check(isEmpty || asList.get(0) != e);
check(asList.indexOf(e) == -1);
check(asList.lastIndexOf(e) == -1);
}
equal(new ArrayList<Integer>(deq), originalContents);
// insert, query, remove element at tail
if (isEmpty) {
check(deq.peekLast() == null);
THROWS(NoSuchElementException.class, () -> deq.getLast());
} else {
check(deq.peekLast() != e);
check(deq.getLast() != e);
}
switch (rnd.nextInt(isList ? 6 : 4)) {
case 0: deq.addLast(e); break;
case 1: check(deq.offerLast(e)); break;
case 2: check(deq.add(e)); break;
case 3: deq.addAll(singleton); break;
case 4: asList.addAll(deq.size(), singleton); break;
case 5: asList.add(deq.size(), e); break;
default: throw new AssertionError();
}
check(deq.peekLast() == e);
check(deq.getLast() == e);
check(deq.contains(e));
if (isList) {
ListIterator it = asList.listIterator(asList.size());
check(it.previous() == e);
check(asList.get(asList.size() - 1) == e);
check(asList.indexOf(e) == asList.size() - 1);
check(asList.lastIndexOf(e) == asList.size() - 1);
int size = asList.size();
check(asList.subList(size - 1, size).equals(singleton));
}
switch (rnd.nextInt(isList ? 8 : 6)) {
case 0: check(deq.pollLast() == e); break;
case 1: check(deq.removeLast() == e); break;
case 2: check(deq.removeFirstOccurrence(e)); break;
case 3: check(deq.removeLastOccurrence(e)); break;
case 4: check(deq.remove(e)); break;
case 5: check(deq.removeAll(singleton)); break;
case 6: asList.remove(asList.size() - 1); break;
case 7:
ListIterator it = asList.listIterator(asList.size());
it.previous();
it.remove();
break;
default: throw new AssertionError();
}
if (isEmpty) {
check(deq.peekLast() == null);
THROWS(NoSuchElementException.class, () -> deq.getLast());
} else {
check(deq.peekLast() != e);
check(deq.getLast() != e);
}
check(!deq.contains(e));
equal(new ArrayList<Integer>(deq), originalContents);
// Test operations on empty deque
switch (rnd.nextInt(isList ? 4 : 2)) {
case 0: deq.clear(); break;
case 1:
Iterator it = deq.iterator();
while (it.hasNext()) {
it.next();
it.remove();
}
break;
case 2: asList.subList(0, asList.size()).clear(); break;
case 3:
ListIterator lit = asList.listIterator(asList.size());
while (lit.hasPrevious()) {
lit.previous();
lit.remove();
}
break;
default: throw new AssertionError();
}
testEmptyCollection(deq);
check(!deq.iterator().hasNext());
if (isList) {
check(!asList.listIterator().hasPrevious());
THROWS(NoSuchElementException.class,
() -> asList.listIterator().previous());
}
THROWS(NoSuchElementException.class,
() -> deq.iterator().next(),
() -> deq.element(),
() -> deq.getFirst(),
() -> deq.getLast(),
() -> deq.pop(),
() -> deq.remove(),
() -> deq.removeFirst(),
() -> deq.removeLast());
check(deq.poll() == null);
check(deq.pollFirst() == null);
check(deq.pollLast() == null);
check(deq.peek() == null);
check(deq.peekFirst() == null);
check(deq.peekLast() == null);
check(!deq.removeFirstOccurrence(e));
check(!deq.removeLastOccurrence(e));
check(deq.addAll(originalContents) == !isEmpty);
equal(new ArrayList<Integer>(deq), originalContents);
check(!deq.addAll(Collections.<Integer>emptyList()));
equal(new ArrayList<Integer>(deq), originalContents);
}
}
private static void testQueueIteratorRemove(Queue<Integer> q) {
System.err.printf("testQueueIteratorRemove %s%n",
q.getClass().getSimpleName());
q.clear();
for (int i = 0; i < 5; i++)
q.add(i);
Iterator<Integer> it = q.iterator();
check(it.hasNext());
for (int i = 3; i >= 0; i--)
q.remove(i);
equal(it.next(), 0);
equal(it.next(), 4);
q.clear();
for (int i = 0; i < 5; i++)
q.add(i);
it = q.iterator();
equal(it.next(), 0);
check(it.hasNext());
for (int i = 1; i < 4; i++)
q.remove(i);
equal(it.next(), 1);
equal(it.next(), 4);
}
// for any array of integer values, check that the result of lastIndexOf(1)
// and indexOf(1) match assumptions for all types of List<Integer> we can
// construct
private static void testListIndexOf(final int index,
final int lastIndex,
final Integer ... values) {
if (values.length == 0) {
checkListIndexOf(emptyList(), index, lastIndex);
} else if (values.length == 1) {
checkListIndexOf(singletonList(values[0]), index, lastIndex);
checkListIndexOf(nCopies(25, values[0]), index, lastIndex == 0 ? 24 : -1);
}
List<Integer> l = List.of(values);
checkListIndexOf(l, index, lastIndex);
checkListIndexOf(Arrays.asList(values), index, lastIndex);
checkListIndexOf(new ArrayList(l), index, lastIndex);
checkListIndexOf(new LinkedList(l), index, lastIndex);
checkListIndexOf(new Vector(l), index, lastIndex);
checkListIndexOf(new CopyOnWriteArrayList(l), index, lastIndex);
}
private static void checkListIndexOf(final List<Integer> list,
final int index,
final int lastIndex) {
String msg = list.getClass().toString();
equal(list.indexOf(1), index, msg);
equal(list.lastIndexOf(1), lastIndex, msg);
equal(list.subList(0, list.size()).indexOf(1), index, msg);
equal(list.subList(0, list.size()).lastIndexOf(1), lastIndex, msg);
}
private static void testList(final List<Integer> l) {
//----------------------------------------------------------------
// 4802633: (coll) AbstractList.addAll(-1,emptyCollection)
// doesn't throw IndexOutOfBoundsException
//----------------------------------------------------------------
try {
l.addAll(-1, Collections.<Integer>emptyList());
fail("Expected IndexOutOfBoundsException not thrown");
}
catch (UnsupportedOperationException ignored) {/* OK */}
catch (IndexOutOfBoundsException ignored) {/* OK */}
catch (Throwable t) { unexpected(t); }
// equal(l instanceof Serializable,
// l.subList(0,0) instanceof Serializable);
if (l.subList(0,0) instanceof Serializable)
check(l instanceof Serializable);
equal(l instanceof RandomAccess,
l.subList(0,0) instanceof RandomAccess);
l.iterator();
l.listIterator();
l.listIterator(0);
l.listIterator(l.size());
THROWS(IndexOutOfBoundsException.class,
() -> l.listIterator(-1),
() -> l.listIterator(l.size() + 1));
if (l instanceof AbstractList) {
try {
int size = l.size();
AbstractList<Integer> abList = (AbstractList<Integer>) l;
Method m = AbstractList.class.getDeclaredMethod("removeRange", new Class[] { int.class, int.class });
m.setAccessible(true);
m.invoke(abList, new Object[] { 0, 0 });
m.invoke(abList, new Object[] { size, size });
equal(size, l.size());
}
catch (UnsupportedOperationException ignored) {/* OK */}
catch (Throwable t) { unexpected(t); }
}
int hashCode = 1;
for (Integer i : l)
hashCode = 31 * hashCode + (i == null ? 0 : i.hashCode());
check(l.hashCode() == hashCode);
var t = new ArrayList<>(l);
check(t.equals(l));
check(l.equals(t));
}
private static void testCollection(Collection<Integer> c) {
try { testCollection1(c); }
catch (Throwable t) { unexpected(t); }
}
private static void testCollection1(Collection<Integer> c) {
System.out.println("\n==> " + c.getClass().getName());
checkFunctionalInvariants(c);
if (! supportsAdd(c)) return;
//System.out.println("add() supported");
if (c instanceof NavigableSet) {
System.out.println("NavigableSet tests...");
NavigableSet<Integer> ns = (NavigableSet<Integer>)c;
testNavigableSet(ns);
testNavigableSet(ns.headSet(6, false));
testNavigableSet(ns.headSet(5, true));
testNavigableSet(ns.tailSet(0, false));
testNavigableSet(ns.tailSet(1, true));
testNavigableSet(ns.subSet(0, false, 5, true));
testNavigableSet(ns.subSet(1, true, 6, false));
}
if (c instanceof Queue)
testQueue((Queue<Integer>)c);
if (c instanceof List)
testList((List<Integer>)c);
if (c instanceof Set) {
int hashCode = 0;
for (Integer i : c)
hashCode = hashCode + (i == null ? 0 : i.hashCode());
check(c.hashCode() == hashCode);
}
check(supportsRemove(c));
try {
oneElement(c);
checkFunctionalInvariants(c);
}
catch (Throwable t) { unexpected(t); }
clear(c); testNullElement(c);
oneElement(c); testNullElement(c);
clear(c); testStringElement(c);
oneElement(c); testStringElement(c);
if (c.getClass().getName().matches(".*concurrent.*"))
testConcurrentCollection(c);
//----------------------------------------------------------------
// The "all" operations should throw NPE when passed null
//----------------------------------------------------------------
{
clear(c);
try {
c.removeAll(null);
fail("Expected NullPointerException");
}
catch (NullPointerException e) { pass(); }
catch (Throwable t) { unexpected(t); }
oneElement(c);
try {
c.removeAll(null);
fail("Expected NullPointerException");
}
catch (NullPointerException e) { pass(); }
catch (Throwable t) { unexpected(t); }
clear(c);
try {
c.retainAll(null);
fail("Expected NullPointerException");
}
catch (NullPointerException e) { pass(); }
catch (Throwable t) { unexpected(t); }
oneElement(c);
try {
c.retainAll(null);
fail("Expected NullPointerException");
}
catch (NullPointerException e) { pass(); }
catch (Throwable t) { unexpected(t); }
oneElement(c);
try {
c.addAll(null);
fail("Expected NullPointerException");
}
catch (NullPointerException e) { pass(); }
catch (Throwable t) { unexpected(t); }
oneElement(c);
try {
c.containsAll(null);
fail("Expected NullPointerException");
}
catch (NullPointerException e) { pass(); }
catch (Throwable t) { unexpected(t); }
}
}
//----------------------------------------------------------------
// Map
//----------------------------------------------------------------
private static void checkFunctionalInvariants(Map<Integer,Integer> m) {
check(m.keySet().size() == m.entrySet().size());
check(m.keySet().size() == m.size());
checkFunctionalInvariants(m.keySet());
checkFunctionalInvariants(m.values());
check(m.size() != 0 ^ m.isEmpty());
check(! m.containsKey(ABSENT_VALUE));
if (m instanceof Serializable) {
//System.out.printf("Serializing %s%n", m.getClass().getName());
try {
Object clone = serialClone(m);
equal(m instanceof Serializable,
clone instanceof Serializable);
equal(m, clone);
} catch (Error xxx) {
if (! (xxx.getCause() instanceof NotSerializableException))
throw xxx;
}
}
}
private static void testMap(Map<Integer,Integer> m) {
System.out.println("\n==> " + m.getClass().getName());
int hashCode = 0;
for (var e : m.entrySet()) {
int entryHash = (e.getKey() == null ? 0 : e.getKey().hashCode()) ^
(e.getValue() == null ? 0 : e.getValue().hashCode());
check(e.hashCode() == entryHash);
hashCode += entryHash;
}
check(m.hashCode() == hashCode);
if (m instanceof ConcurrentMap)
testConcurrentMap((ConcurrentMap<Integer,Integer>) m);
if (m instanceof NavigableMap) {
System.out.println("NavigableMap tests...");
NavigableMap<Integer,Integer> nm =
(NavigableMap<Integer,Integer>) m;
testNavigableMapRemovers(nm);
testNavigableMap(nm);
testNavigableMap(nm.headMap(6, false));
testNavigableMap(nm.headMap(5, true));
testNavigableMap(nm.tailMap(0, false));
testNavigableMap(nm.tailMap(1, true));
testNavigableMap(nm.subMap(1, true, 6, false));
testNavigableMap(nm.subMap(0, false, 5, true));
}
checkFunctionalInvariants(m);
if (supportsClear(m)) {
try { clear(m); }
catch (Throwable t) { unexpected(t); }
}
if (supportsPut(m)) {
try {
check(m.put(3333, 77777) == null);
check(m.put(9134, 74982) == null);
check(m.get(9134) == 74982);
check(m.put(9134, 1382) == 74982);
check(m.get(9134) == 1382);
check(m.size() == 2);
checkFunctionalInvariants(m);
checkNPEConsistency(m);
}
catch (Throwable t) { unexpected(t); }
}
}
private static boolean supportsPut(Map<Integer,Integer> m) {
// We're asking for .equals(...) semantics
if (m instanceof IdentityHashMap) return false;
try { check(m.put(ABSENT_VALUE,12735) == null); }
catch (UnsupportedOperationException t) { return false; }
catch (Throwable t) { unexpected(t); }
try {
check(m.containsKey(ABSENT_VALUE));
check(m.remove(ABSENT_VALUE) != null);
} catch (Throwable t) { unexpected(t); }
return true;
}
private static boolean supportsClear(Map<?,?> m) {
try { m.clear(); }
catch (UnsupportedOperationException t) { return false; }
catch (Throwable t) { unexpected(t); }
return true;
}
//----------------------------------------------------------------
// ConcurrentMap
//----------------------------------------------------------------
private static void testConcurrentMap(ConcurrentMap<Integer,Integer> m) {
System.out.println("ConcurrentMap tests...");
try {
clear(m);
check(m.putIfAbsent(18357,7346) == null);
check(m.containsKey(18357));
check(m.putIfAbsent(18357,8263) == 7346);
try { m.putIfAbsent(18357,null); fail("NPE"); }
catch (NullPointerException t) { }
check(m.containsKey(18357));
check(! m.replace(18357,8888,7777));
check(m.containsKey(18357));
try { m.replace(18357,null,7777); fail("NPE"); }
catch (NullPointerException t) { }
check(m.containsKey(18357));
check(m.get(18357) == 7346);
check(m.replace(18357,7346,5555));
check(m.replace(18357,5555,7346));
check(m.get(18357) == 7346);
check(m.replace(92347,7834) == null);
try { m.replace(18357,null); fail("NPE"); }
catch (NullPointerException t) { }
check(m.replace(18357,7346) == 7346);
check(m.replace(18357,5555) == 7346);
check(m.get(18357) == 5555);
check(m.replace(18357,7346) == 5555);
check(m.get(18357) == 7346);
check(! m.remove(18357,9999));
check(m.get(18357) == 7346);
check(m.containsKey(18357));
check(! m.remove(18357,null)); // 6272521
check(m.get(18357) == 7346);
check(m.remove(18357,7346));
check(m.get(18357) == null);
check(! m.containsKey(18357));
check(m.isEmpty());
m.putIfAbsent(1,2);
check(m.size() == 1);
check(! m.remove(1,null));
check(! m.remove(1,null));
check(! m.remove(1,1));
check(m.remove(1,2));
check(m.isEmpty());
testEmptyMap(m);
}
catch (Throwable t) { unexpected(t); }
}
private static void throwsConsistently(Class<? extends Throwable> k,
Iterable<Fun> fs) {
List<Class<? extends Throwable>> threw = new ArrayList<>();
for (Fun f : fs)
try { f.f(); threw.add(null); }
catch (Throwable t) {
check(k.isAssignableFrom(t.getClass()));
threw.add(t.getClass());
}
if (new HashSet<Object>(threw).size() != 1)
fail(threw.toString());
}
private static <T> void checkNPEConsistency(final Map<T,Integer> m) {
m.clear();
final ConcurrentMap<T,Integer> cm = (m instanceof ConcurrentMap)
? (ConcurrentMap<T,Integer>) m
: null;
List<Fun> fs = new ArrayList<>();
fs.add(() -> check(! m.containsKey(null)));
fs.add(() -> equal(m.remove(null), null));
fs.add(() -> equal(m.get(null), null));
if (cm != null)
fs.add(() -> check(! cm.remove(null,null)));
throwsConsistently(NullPointerException.class, fs);
fs.clear();
final Map<T,Integer> sm = singletonMap(null,1);
fs.add(() -> { equal(m.put(null,1), null); m.clear();});
fs.add(() -> { m.putAll(sm); m.clear();});
if (cm != null) {
fs.add(() -> check(! cm.remove(null,null)));
fs.add(() -> equal(cm.putIfAbsent(null,1), 1));
fs.add(() -> equal(cm.replace(null,1), null));
fs.add(() -> equal(cm.replace(null,1, 1), 1));
}
throwsConsistently(NullPointerException.class, fs);
}
//----------------------------------------------------------------
// NavigableMap
//----------------------------------------------------------------
private static void
checkNavigableMapKeys(NavigableMap<Integer,Integer> m,
Integer i,
Integer lower,
Integer floor,
Integer ceiling,
Integer higher) {
equal(m.lowerKey(i), lower);
equal(m.floorKey(i), floor);
equal(m.ceilingKey(i), ceiling);
equal(m.higherKey(i), higher);
}
private static void
checkNavigableSetKeys(NavigableSet<Integer> m,
Integer i,
Integer lower,
Integer floor,
Integer ceiling,
Integer higher) {
equal(m.lower(i), lower);
equal(m.floor(i), floor);
equal(m.ceiling(i), ceiling);
equal(m.higher(i), higher);
}
static final Random rnd = new Random();
static void equalNext(final Iterator<?> it, Object expected) {
if (rnd.nextBoolean())
check(it.hasNext());
equal(it.next(), expected);
}
static void equalMaps(Map m1, Map m2) {
equal(m1, m2);
equal(m2, m1);
equal(m1.size(), m2.size());
equal(m1.isEmpty(), m2.isEmpty());
equal(m1.toString(), m2.toString());
check(Arrays.equals(m1.entrySet().toArray(), m2.entrySet().toArray()));
}
@SuppressWarnings({"unchecked", "rawtypes"})
static void testNavigableMapRemovers(NavigableMap m)
{
final Map emptyMap = new HashMap();
final Map singletonMap = new HashMap();
singletonMap.put(1, 2);
abstract class NavigableMapView {
abstract NavigableMap view(NavigableMap m);
}
NavigableMapView[] views = {
new NavigableMapView() { NavigableMap view(NavigableMap m) {
return m; }},
new NavigableMapView() { NavigableMap view(NavigableMap m) {
return m.headMap(99, true); }},
new NavigableMapView() { NavigableMap view(NavigableMap m) {
return m.tailMap(-99, false); }},
new NavigableMapView() { NavigableMap view(NavigableMap m) {
return m.subMap(-99, true, 99, false); }},
};
abstract class Remover {
abstract void remove(NavigableMap m, Object k, Object v);
}
Remover[] removers = {
new Remover() { void remove(NavigableMap m, Object k, Object v) {
equal(m.remove(k), v); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
equal(m.descendingMap().remove(k), v); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
equal(m.descendingMap().headMap(-86, false).remove(k), v); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
equal(m.descendingMap().tailMap(86, true).remove(k), v); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
equal(m.headMap(86, true).remove(k), v); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
equal(m.tailMap(-86, true).remove(k), v); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
equal(m.subMap(-86, false, 86, true).remove(k), v); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
check(m.keySet().remove(k)); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
check(m.navigableKeySet().remove(k)); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
check(m.navigableKeySet().headSet(86, true).remove(k)); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
check(m.navigableKeySet().tailSet(-86, false).remove(k)); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
check(m.navigableKeySet().subSet(-86, true, 86, false)
.remove(k)); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
check(m.descendingKeySet().headSet(-86, false).remove(k)); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
check(m.descendingKeySet().tailSet(86, true).remove(k)); }},
new Remover() { void remove(NavigableMap m, Object k, Object v) {
check(m.descendingKeySet().subSet(86, true, -86, false)
.remove(k)); }},
};
for (NavigableMapView view : views) {
for (Remover remover : removers) {
try {
m.clear();
equalMaps(m, emptyMap);
equal(m.put(1, 2), null);
equalMaps(m, singletonMap);
NavigableMap v = view.view(m);
remover.remove(v, 1, 2);
equalMaps(m, emptyMap);
} catch (Throwable t) { unexpected(t); }
}
}
}
private static void testNavigableMap(NavigableMap<Integer,Integer> m)
{
clear(m);
checkNavigableMapKeys(m, 1, null, null, null, null);
equal(m.put(1, 2), null);
equal(m.put(3, 4), null);
equal(m.put(5, 9), null);
equal(m.put(1, 2), 2);
equal(m.put(3, 4), 4);
equal(m.put(5, 6), 9);
checkNavigableMapKeys(m, 0, null, null, 1, 1);
checkNavigableMapKeys(m, 1, null, 1, 1, 3);
checkNavigableMapKeys(m, 2, 1, 1, 3, 3);
checkNavigableMapKeys(m, 3, 1, 3, 3, 5);
checkNavigableMapKeys(m, 5, 3, 5, 5, null);
checkNavigableMapKeys(m, 6, 5, 5, null, null);
for (final Iterator<Integer> it :
(Iterator<Integer>[])
new Iterator<?>[] {
m.descendingKeySet().iterator(),
m.navigableKeySet().descendingIterator()}) {
equalNext(it, 5);
equalNext(it, 3);
equalNext(it, 1);
check(! it.hasNext());
THROWS(NoSuchElementException.class, () -> it.next());
}
{
final Iterator<Map.Entry<Integer,Integer>> it
= m.descendingMap().entrySet().iterator();
check(it.hasNext()); equal(it.next().getKey(), 5);
check(it.hasNext()); equal(it.next().getKey(), 3);
check(it.hasNext()); equal(it.next().getKey(), 1);
check(! it.hasNext());
THROWS(NoSuchElementException.class, () -> it.next());
}
prepMapForDescItrTests(m);
checkDescItrRmFirst(m.keySet(), m.navigableKeySet().descendingIterator());
prepMapForDescItrTests(m);
checkDescItrRmMid(m.keySet(), m.navigableKeySet().descendingIterator());
prepMapForDescItrTests(m);
checkDescItrRmLast(m.keySet(), m.navigableKeySet().descendingIterator());
prepMapForDescItrTests(m);
checkDescItrRmFirst(m.keySet(), m.descendingMap().keySet().iterator());
prepMapForDescItrTests(m);
checkDescItrRmMid(m.keySet(), m.descendingMap().keySet().iterator());
prepMapForDescItrTests(m);
checkDescItrRmLast(m.keySet(), m.descendingMap().keySet().iterator());
prepMapForDescItrTests(m);
checkDescItrRmFirst(m.keySet(), m.descendingKeySet().iterator());
prepMapForDescItrTests(m);
checkDescItrRmMid(m.keySet(), m.descendingKeySet().iterator());
prepMapForDescItrTests(m);
checkDescItrRmLast(m.keySet(), m.descendingKeySet().iterator());
prepMapForDescItrTests(m);
checkDescItrRmFirst(m.values(), m.descendingMap().values().iterator());
prepMapForDescItrTests(m);
checkDescItrRmMid(m.values(), m.descendingMap().values().iterator());
prepMapForDescItrTests(m);
checkDescItrRmLast(m.values(), m.descendingMap().values().iterator());
prepMapForDescItrTests(m);
checkDescItrRmFirst((Collection)m.entrySet(),
m.descendingMap().entrySet().iterator());
prepMapForDescItrTests(m);
checkDescItrRmMid((Collection)m.entrySet(),
m.descendingMap().entrySet().iterator());
prepMapForDescItrTests(m);
checkDescItrRmLast((Collection)m.entrySet(),
m.descendingMap().entrySet().iterator());
}
private static void testNavigableSet(NavigableSet<Integer> s) {
clear(s);
checkNavigableSetKeys(s, 1, null, null, null, null);
check(s.add(1));
check(s.add(3));
check(s.add(5));
check(! s.add(1));
check(! s.add(3));
check(! s.add(5));
checkNavigableSetKeys(s, 0, null, null, 1, 1);
checkNavigableSetKeys(s, 1, null, 1, 1, 3);
checkNavigableSetKeys(s, 2, 1, 1, 3, 3);
checkNavigableSetKeys(s, 3, 1, 3, 3, 5);
checkNavigableSetKeys(s, 5, 3, 5, 5, null);
checkNavigableSetKeys(s, 6, 5, 5, null, null);
for (final Iterator<Integer> it :
(Iterator<Integer>[])
new Iterator<?>[] {
s.descendingIterator(),
s.descendingSet().iterator()}) {
equalNext(it, 5);
equalNext(it, 3);
equalNext(it, 1);
check(! it.hasNext());
THROWS(NoSuchElementException.class, () -> it.next());
}
prepSetForDescItrTests(s);
checkDescItrRmFirst(s, s.descendingIterator());
prepSetForDescItrTests(s);
checkDescItrRmMid(s, s.descendingIterator());
prepSetForDescItrTests(s);
checkDescItrRmLast(s, s.descendingIterator());
prepSetForDescItrTests(s);
checkDescItrRmFirst(s, s.descendingSet().iterator());
prepSetForDescItrTests(s);
checkDescItrRmMid(s, s.descendingSet().iterator());
prepSetForDescItrTests(s);
checkDescItrRmLast(s, s.descendingSet().iterator());
}
private static void prepSetForDescItrTests(Set s) {
clear(s);
check(s.add(1));
check(s.add(3));
check(s.add(5));
}
private static void prepMapForDescItrTests(Map m) {
clear(m);
equal(m.put(1, 2), null);
equal(m.put(3, 4), null);
equal(m.put(5, 9), null);
}
//--------------------------------------------------------------------
// Check behavior of descending iterator when first element is removed
//--------------------------------------------------------------------
private static <T> void checkDescItrRmFirst(Collection<T> ascColl,
Iterator<T> descItr) {
T[] expected = (T[]) ascColl.toArray();
int idx = expected.length -1;
equalNext(descItr, expected[idx--]);
descItr.remove();
while (idx >= 0 && descItr.hasNext()) {
equalNext(descItr, expected[idx--]);
}
equal(descItr.hasNext(), false);
equal(idx, -1);
}
//-----------------------------------------------------------------------
// Check behavior of descending iterator when a middle element is removed
//-----------------------------------------------------------------------
private static <T> void checkDescItrRmMid(Collection<T> ascColl,
Iterator<T> descItr) {
T[] expected = (T[]) ascColl.toArray();
int idx = expected.length -1;
while (idx >= expected.length / 2) {
equalNext(descItr, expected[idx--]);
}
descItr.remove();
while (idx >= 0 && descItr.hasNext()) {
equalNext(descItr, expected[idx--]);
}
equal(descItr.hasNext(), false);
equal(idx, -1);
}
//-----------------------------------------------------------------------
// Check behavior of descending iterator when the last element is removed
//-----------------------------------------------------------------------
private static <T> void checkDescItrRmLast(Collection<T> ascColl,
Iterator<T> descItr) {
T[] expected = (T[]) ascColl.toArray();
int idx = expected.length -1;
while (idx >= 0 && descItr.hasNext()) {
equalNext(descItr, expected[idx--]);
}
equal(idx, -1);
equal(descItr.hasNext(), false);
descItr.remove();
equal(ascColl.contains(expected[0]), false);
}
//--------------------- Infrastructure ---------------------------
static volatile int passed = 0, failed = 0;
static void pass() { passed++; }
static void fail() { failed++; Thread.dumpStack(); }
static void fail(String msg) { System.out.println(msg); fail(); }
static void unexpected(Throwable t) { failed++; t.printStackTrace(); }
static void check(boolean cond) { if (cond) pass(); else fail(); }
static void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else {System.out.println(x + " not equal to " + y); fail();}}
static void equal(Object x, Object y, String msg) {
if (x == null ? y == null : x.equals(y)) pass();
else {System.out.println(x + " not equal to " + y + " : " + msg); fail();}}
static void equal2(Object x, Object y) {equal(x, y); equal(y, x);}
public static void main(String[] args) throws Throwable {
try { realMain(args); } catch (Throwable t) { unexpected(t); }
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
if (failed > 0) throw new Exception("Some tests failed");
}
interface Fun {void f() throws Throwable;}
private static void THROWS(Class<? extends Throwable> k, Fun... fs) {
for (Fun f : fs)
try { f.f(); fail("Expected " + k.getName() + " not thrown"); }
catch (Throwable t) {
if (k.isAssignableFrom(t.getClass())) pass();
else unexpected(t);}}
static byte[] serializedForm(Object obj) {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
new ObjectOutputStream(baos).writeObject(obj);
return baos.toByteArray();
} catch (IOException e) { throw new Error(e); }}
static Object readObject(byte[] bytes)
throws IOException, ClassNotFoundException {
InputStream is = new ByteArrayInputStream(bytes);
return new ObjectInputStream(is).readObject();}
@SuppressWarnings("unchecked")
static <T> T serialClone(T obj) {
try { return (T) readObject(serializedForm(obj)); }
catch (Exception e) { throw new Error(e); }}
private static class NewAbstractCollection<E> extends AbstractCollection<E> {
ArrayList<E> list = new ArrayList<>();
public boolean remove(Object obj) {
return list.remove(obj);
}
public boolean add(E e) {
return list.add(e);
}
public Iterator<E> iterator() {
return list.iterator();
}
public int size() {
return list.size();
}
}
private static class NewAbstractSet<E> extends AbstractSet<E> {
HashSet<E> set = new HashSet<>();
public boolean remove(Object obj) {
return set.remove(obj);
}
public boolean add(E e) {
return set.add(e);
}
public Iterator<E> iterator() {
return set.iterator();
}
public int size() {
return set.size();
}
}
}