/*
* Copyright (C) 2007 The Guava Authors
*
* Licensed 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 com.google.common.collect;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Maps.immutableEntry;
import static com.google.common.collect.Sets.newHashSet;
import static com.google.common.collect.testing.Helpers.nefariousMapEntry;
import static com.google.common.collect.testing.IteratorFeature.MODIFIABLE;
import static java.util.Arrays.asList;
import static org.junit.contrib.truth.Truth.ASSERT;
import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.base.Function;
import com.google.common.base.Functions;
import com.google.common.base.Supplier;
import com.google.common.collect.Maps.EntryTransformer;
import com.google.common.collect.testing.IteratorTester;
import com.google.common.collect.testing.google.UnmodifiableCollectionTests;
import com.google.common.testing.NullPointerTester;
import com.google.common.testing.SerializableTester;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Queue;
import java.util.RandomAccess;
import java.util.Set;
import java.util.SortedMap;
import java.util.SortedSet;
import java.util.TreeSet;
import javax.annotation.Nullable;
/**
* Unit test for {@code Multimaps}.
*
* @author Jared Levy
*/
@GwtCompatible(emulated = true)
public class MultimapsTest extends AbstractMultimapTest {
private static final Comparator<Integer> INT_COMPARATOR =
Ordering.<Integer>natural().reverse().nullsFirst();
private static final EntryTransformer<Object, Object, Object> ALWAYS_NULL =
new EntryTransformer<Object, Object, Object>() {
@Override
public Object transformEntry(Object k, Object v1) {
return null;
}
};
@Override protected Multimap<String, Integer> create() {
return Multimaps.synchronizedSetMultimap(
HashMultimap.<String, Integer>create());
}
@SuppressWarnings("deprecation")
public void testUnmodifiableListMultimapShortCircuit() {
ListMultimap<String, Integer> mod = ArrayListMultimap.create();
ListMultimap<String, Integer> unmod = Multimaps.unmodifiableListMultimap(mod);
assertNotSame(mod, unmod);
assertSame(unmod, Multimaps.unmodifiableListMultimap(unmod));
ImmutableListMultimap<String, Integer> immutable =
ImmutableListMultimap.of("a", 1, "b", 2, "a", 3);
assertSame(immutable, Multimaps.unmodifiableListMultimap(immutable));
assertSame(
immutable, Multimaps.unmodifiableListMultimap((ListMultimap<String, Integer>) immutable));
}
@SuppressWarnings("deprecation")
public void testUnmodifiableSetMultimapShortCircuit() {
SetMultimap<String, Integer> mod = HashMultimap.create();
SetMultimap<String, Integer> unmod = Multimaps.unmodifiableSetMultimap(mod);
assertNotSame(mod, unmod);
assertSame(unmod, Multimaps.unmodifiableSetMultimap(unmod));
ImmutableSetMultimap<String, Integer> immutable =
ImmutableSetMultimap.of("a", 1, "b", 2, "a", 3);
assertSame(immutable, Multimaps.unmodifiableSetMultimap(immutable));
assertSame(
immutable, Multimaps.unmodifiableSetMultimap((SetMultimap<String, Integer>) immutable));
}
@SuppressWarnings("deprecation")
public void testUnmodifiableMultimapShortCircuit() {
Multimap<String, Integer> mod = HashMultimap.create();
Multimap<String, Integer> unmod = Multimaps.unmodifiableMultimap(mod);
assertNotSame(mod, unmod);
assertSame(unmod, Multimaps.unmodifiableMultimap(unmod));
ImmutableMultimap<String, Integer> immutable = ImmutableMultimap.of("a", 1, "b", 2, "a", 3);
assertSame(immutable, Multimaps.unmodifiableMultimap(immutable));
assertSame(immutable, Multimaps.unmodifiableMultimap((Multimap<String, Integer>) immutable));
}
@GwtIncompatible("slow (~10s)")
public void testUnmodifiableArrayListMultimap() {
checkUnmodifiableMultimap(
ArrayListMultimap.<String, Integer>create(), true);
}
@GwtIncompatible("SerializableTester")
public void testSerializingUnmodifiableArrayListMultimap() {
Multimap<String, Integer> unmodifiable =
prepareUnmodifiableTests(ArrayListMultimap.<String, Integer>create(), true, null, null);
SerializableTester.reserializeAndAssert(unmodifiable);
}
public void testUnmodifiableArrayListMultimapRandomAccess() {
ListMultimap<String, Integer> delegate = ArrayListMultimap.create();
delegate.put("foo", 1);
delegate.put("foo", 3);
ListMultimap<String, Integer> multimap
= Multimaps.unmodifiableListMultimap(delegate);
assertTrue(multimap.get("foo") instanceof RandomAccess);
assertTrue(multimap.get("bar") instanceof RandomAccess);
}
public void testUnmodifiableLinkedListMultimapRandomAccess() {
ListMultimap<String, Integer> delegate = LinkedListMultimap.create();
delegate.put("foo", 1);
delegate.put("foo", 3);
ListMultimap<String, Integer> multimap
= Multimaps.unmodifiableListMultimap(delegate);
assertFalse(multimap.get("foo") instanceof RandomAccess);
assertFalse(multimap.get("bar") instanceof RandomAccess);
}
@GwtIncompatible("slow (~10s)")
public void testUnmodifiableHashMultimap() {
checkUnmodifiableMultimap(HashMultimap.<String, Integer>create(), false);
}
@GwtIncompatible("SerializableTester")
public void testSerializingUnmodifiableHashMultimap() {
Multimap<String, Integer> unmodifiable =
prepareUnmodifiableTests(HashMultimap.<String, Integer>create(), false, null, null);
SerializableTester.reserializeAndAssert(unmodifiable);
}
@GwtIncompatible("slow (~10s)")
public void testUnmodifiableTreeMultimap() {
checkUnmodifiableMultimap(
TreeMultimap.<String, Integer>create(), false, "null", 42);
}
@GwtIncompatible("SerializableTester")
public void testSerializingUnmodifiableTreeMultimap() {
Multimap<String, Integer> unmodifiable =
prepareUnmodifiableTests(TreeMultimap.<String, Integer>create(), false, "null", 42);
SerializableTester.reserializeAndAssert(unmodifiable);
}
@GwtIncompatible("slow (~10s)")
public void testUnmodifiableSynchronizedArrayListMultimap() {
checkUnmodifiableMultimap(Multimaps.synchronizedListMultimap(
ArrayListMultimap.<String, Integer>create()), true);
}
@GwtIncompatible("SerializableTester")
public void testSerializingUnmodifiableSynchronizedArrayListMultimap() {
Multimap<String, Integer> unmodifiable =
prepareUnmodifiableTests(Multimaps.synchronizedListMultimap(
ArrayListMultimap.<String, Integer>create()), true, null, null);
SerializableTester.reserializeAndAssert(unmodifiable);
}
@GwtIncompatible("slow (~10s)")
public void testUnmodifiableSynchronizedHashMultimap() {
checkUnmodifiableMultimap(Multimaps.synchronizedSetMultimap(
HashMultimap.<String, Integer>create()), false);
}
@GwtIncompatible("SerializableTester")
public void testSerializingUnmodifiableSynchronizedHashMultimap() {
Multimap<String, Integer> unmodifiable =
prepareUnmodifiableTests(Multimaps.synchronizedSetMultimap(
HashMultimap.<String, Integer>create()), false, null, null);
SerializableTester.reserializeAndAssert(unmodifiable);
}
@GwtIncompatible("slow (~10s)")
public void testUnmodifiableSynchronizedTreeMultimap() {
TreeMultimap<String, Integer> delegate
= TreeMultimap.create(Ordering.<String>natural(), INT_COMPARATOR);
SortedSetMultimap<String, Integer> multimap
= Multimaps.synchronizedSortedSetMultimap(delegate);
checkUnmodifiableMultimap(multimap, false, "null", 42);
assertSame(INT_COMPARATOR, multimap.valueComparator());
}
@GwtIncompatible("SerializableTester")
public void testSerializingUnmodifiableSynchronizedTreeMultimap() {
TreeMultimap<String, Integer> delegate =
TreeMultimap.create(Ordering.<String>natural(), INT_COMPARATOR);
SortedSetMultimap<String, Integer> multimap =
Multimaps.synchronizedSortedSetMultimap(delegate);
Multimap<String, Integer> unmodifiable =
prepareUnmodifiableTests(multimap, false, "null", 42);
SerializableTester.reserializeAndAssert(unmodifiable);
assertSame(INT_COMPARATOR, multimap.valueComparator());
}
public void testUnmodifiableMultimapIsView() {
Multimap<String, Integer> mod = HashMultimap.create();
Multimap<String, Integer> unmod = Multimaps.unmodifiableMultimap(mod);
assertEquals(mod, unmod);
mod.put("foo", 1);
assertTrue(unmod.containsEntry("foo", 1));
assertEquals(mod, unmod);
}
@SuppressWarnings("unchecked")
public void testUnmodifiableMultimapEntries() {
Multimap<String, Integer> mod = HashMultimap.create();
Multimap<String, Integer> unmod = Multimaps.unmodifiableMultimap(mod);
mod.put("foo", 1);
Entry<String, Integer> entry = unmod.entries().iterator().next();
try {
entry.setValue(2);
fail("UnsupportedOperationException expected");
} catch (UnsupportedOperationException expected) {}
entry = (Entry<String, Integer>) unmod.entries().toArray()[0];
try {
entry.setValue(2);
fail("UnsupportedOperationException expected");
} catch (UnsupportedOperationException expected) {}
Entry<String, Integer>[] array
= (Entry<String, Integer>[]) new Entry<?, ?>[2];
assertSame(array, unmod.entries().toArray(array));
try {
array[0].setValue(2);
fail("UnsupportedOperationException expected");
} catch (UnsupportedOperationException expected) {}
assertFalse(unmod.entries().contains(nefariousMapEntry("pwnd", 2)));
assertFalse(unmod.keys().contains("pwnd"));
}
/**
* The supplied multimap will be mutated and an unmodifiable instance used
* in its stead. The multimap must support null keys and values.
*/
private static void checkUnmodifiableMultimap(
Multimap<String, Integer> multimap, boolean permitsDuplicates) {
checkUnmodifiableMultimap(multimap, permitsDuplicates, null, null);
}
/**
* The supplied multimap will be mutated and an unmodifiable instance used
* in its stead. If the multimap does not support null keys or values,
* alternatives may be specified for tests involving nulls.
*/
private static void checkUnmodifiableMultimap(
Multimap<String, Integer> multimap, boolean permitsDuplicates,
@Nullable String nullKey, @Nullable Integer nullValue) {
Multimap<String, Integer> unmodifiable =
prepareUnmodifiableTests(multimap, permitsDuplicates, nullKey, nullValue);
UnmodifiableCollectionTests.assertMultimapIsUnmodifiable(
unmodifiable, "test", 123);
assertUnmodifiableIterableInTandem(
unmodifiable.keys(), multimap.keys());
assertUnmodifiableIterableInTandem(
unmodifiable.keySet(), multimap.keySet());
assertUnmodifiableIterableInTandem(
unmodifiable.entries(), multimap.entries());
assertUnmodifiableIterableInTandem(
unmodifiable.asMap().entrySet(), multimap.asMap().entrySet());
assertEquals(multimap.toString(), unmodifiable.toString());
assertEquals(multimap.hashCode(), unmodifiable.hashCode());
assertEquals(multimap, unmodifiable);
ASSERT.that(unmodifiable.asMap().get("bar")).hasContentsAnyOrder(5, -1);
assertNull(unmodifiable.asMap().get("missing"));
assertFalse(unmodifiable.entries() instanceof Serializable);
assertFalse(unmodifiable.asMap().values() instanceof Serializable);
}
/**
* Prepares the multimap for unmodifiable tests, returning an unmodifiable view
* of the map.
*/
private static Multimap<String, Integer> prepareUnmodifiableTests(
Multimap<String, Integer> multimap, boolean permitsDuplicates,
@Nullable String nullKey, @Nullable Integer nullValue) {
multimap.clear();
multimap.put("foo", 1);
multimap.put("foo", 2);
multimap.put("foo", 3);
multimap.put("bar", 5);
multimap.put("bar", -1);
multimap.put(nullKey, nullValue);
multimap.put("foo", nullValue);
multimap.put(nullKey, 5);
multimap.put("foo", 2);
if (permitsDuplicates) {
assertEquals(9, multimap.size());
} else {
assertEquals(8, multimap.size());
}
Multimap<String, Integer> unmodifiable;
if (multimap instanceof SortedSetMultimap) {
unmodifiable = Multimaps.unmodifiableSortedSetMultimap(
(SortedSetMultimap<String, Integer>) multimap);
} else if (multimap instanceof SetMultimap) {
unmodifiable = Multimaps.unmodifiableSetMultimap(
(SetMultimap<String, Integer>) multimap);
} else if (multimap instanceof ListMultimap) {
unmodifiable = Multimaps.unmodifiableListMultimap(
(ListMultimap<String, Integer>) multimap);
} else {
unmodifiable = Multimaps.unmodifiableMultimap(multimap);
}
return unmodifiable;
}
private static <T> void assertUnmodifiableIterableInTandem(
Iterable<T> unmodifiable, Iterable<T> modifiable) {
UnmodifiableCollectionTests.assertIteratorIsUnmodifiable(
unmodifiable.iterator());
UnmodifiableCollectionTests.assertIteratorsInOrder(
unmodifiable.iterator(), modifiable.iterator());
}
public void testInvertFrom() {
ImmutableMultimap<Integer, String> empty = ImmutableMultimap.of();
// typical usage example - sad that ArrayListMultimap.create() won't work
Multimap<String, Integer> multimap = Multimaps.invertFrom(empty,
ArrayListMultimap.<String, Integer>create());
assertTrue(multimap.isEmpty());
ImmutableMultimap<Integer, String> single
= new ImmutableMultimap.Builder<Integer, String>()
.put(1, "one")
.put(2, "two")
.build();
// copy into existing multimap
assertSame(multimap, Multimaps.invertFrom(single, multimap));
ImmutableMultimap<String, Integer> expected
= new ImmutableMultimap.Builder<String, Integer>()
.put("one", 1)
.put("two", 2)
.build();
assertEquals(expected, multimap);
}
public void testForMap() {
Map<String, Integer> map = Maps.newHashMap();
map.put("foo", 1);
map.put("bar", 2);
Multimap<String, Integer> multimap = HashMultimap.create();
multimap.put("foo", 1);
multimap.put("bar", 2);
Multimap<String, Integer> multimapView = Multimaps.forMap(map);
assertTrue(multimap.equals(multimapView));
assertTrue(multimapView.equals(multimap));
assertTrue(multimapView.equals(multimapView));
assertFalse(multimapView.equals(map));
Multimap<String, Integer> multimap2 = HashMultimap.create();
multimap2.put("foo", 1);
assertFalse(multimapView.equals(multimap2));
multimap2.put("bar", 1);
assertFalse(multimapView.equals(multimap2));
ListMultimap<String, Integer> listMultimap
= new ImmutableListMultimap.Builder<String, Integer>()
.put("foo", 1).put("bar", 2).build();
assertFalse("SetMultimap equals ListMultimap",
multimapView.equals(listMultimap));
assertEquals(multimap.toString(), multimapView.toString());
assertEquals(multimap.hashCode(), multimapView.hashCode());
assertEquals(multimap.size(), multimapView.size());
assertTrue(multimapView.containsKey("foo"));
assertTrue(multimapView.containsValue(1));
assertTrue(multimapView.containsEntry("bar", 2));
assertEquals(Collections.singleton(1), multimapView.get("foo"));
assertEquals(Collections.singleton(2), multimapView.get("bar"));
try {
multimapView.put("baz", 3);
fail("UnsupportedOperationException expected");
} catch (UnsupportedOperationException expected) {}
try {
multimapView.putAll("baz", Collections.singleton(3));
fail("UnsupportedOperationException expected");
} catch (UnsupportedOperationException expected) {}
try {
multimapView.putAll(multimap);
fail("UnsupportedOperationException expected");
} catch (UnsupportedOperationException expected) {}
try {
multimapView.replaceValues("foo", Collections.<Integer>emptySet());
fail("UnsupportedOperationException expected");
} catch (UnsupportedOperationException expected) {}
multimapView.remove("bar", 2);
assertFalse(multimapView.containsKey("bar"));
assertFalse(map.containsKey("bar"));
assertEquals(map.keySet(), multimapView.keySet());
assertEquals(map.keySet(), multimapView.keys().elementSet());
ASSERT.that(multimapView.keys()).hasContentsAnyOrder("foo");
ASSERT.that(multimapView.values()).hasContentsAnyOrder(1);
ASSERT.that(multimapView.entries()).hasContentsAnyOrder(
Maps.immutableEntry("foo", 1));
ASSERT.that(multimapView.asMap().entrySet()).hasContentsAnyOrder(
Maps.immutableEntry(
"foo", (Collection<Integer>) Collections.singleton(1)));
multimapView.clear();
assertFalse(multimapView.containsKey("foo"));
assertFalse(map.containsKey("foo"));
assertTrue(map.isEmpty());
assertTrue(multimapView.isEmpty());
multimap.clear();
assertEquals(multimap.toString(), multimapView.toString());
assertEquals(multimap.hashCode(), multimapView.hashCode());
assertEquals(multimap.size(), multimapView.size());
assertEquals(multimapView, ArrayListMultimap.create());
}
@GwtIncompatible("SerializableTester")
public void testForMapSerialization() {
Map<String, Integer> map = Maps.newHashMap();
map.put("foo", 1);
map.put("bar", 2);
Multimap<String, Integer> multimapView = Multimaps.forMap(map);
SerializableTester.reserializeAndAssert(multimapView);
}
public void testForMapRemoveAll() {
Map<String, Integer> map = Maps.newHashMap();
map.put("foo", 1);
map.put("bar", 2);
map.put("cow", 3);
Multimap<String, Integer> multimap = Multimaps.forMap(map);
assertEquals(3, multimap.size());
assertEquals(Collections.emptySet(), multimap.removeAll("dog"));
assertEquals(3, multimap.size());
assertTrue(multimap.containsKey("bar"));
assertEquals(Collections.singleton(2), multimap.removeAll("bar"));
assertEquals(2, multimap.size());
assertFalse(multimap.containsKey("bar"));
}
public void testForMapAsMap() {
Map<String, Integer> map = Maps.newHashMap();
map.put("foo", 1);
map.put("bar", 2);
Map<String, Collection<Integer>> asMap = Multimaps.forMap(map).asMap();
assertEquals(Collections.singleton(1), asMap.get("foo"));
assertNull(asMap.get("cow"));
assertTrue(asMap.containsKey("foo"));
assertFalse(asMap.containsKey("cow"));
Set<Entry<String, Collection<Integer>>> entries = asMap.entrySet();
assertFalse(entries.contains(4.5));
assertFalse(entries.remove(4.5));
assertFalse(entries.contains(Maps.immutableEntry("foo",
Collections.singletonList(1))));
assertFalse(entries.remove(Maps.immutableEntry("foo",
Collections.singletonList(1))));
assertFalse(entries.contains(Maps.immutableEntry("foo",
Sets.newLinkedHashSet(asList(1, 2)))));
assertFalse(entries.remove(Maps.immutableEntry("foo",
Sets.newLinkedHashSet(asList(1, 2)))));
assertFalse(entries.contains(Maps.immutableEntry("foo",
Collections.singleton(2))));
assertFalse(entries.remove(Maps.immutableEntry("foo",
Collections.singleton(2))));
assertTrue(map.containsKey("foo"));
assertTrue(entries.contains(Maps.immutableEntry("foo",
Collections.singleton(1))));
assertTrue(entries.remove(Maps.immutableEntry("foo",
Collections.singleton(1))));
assertFalse(map.containsKey("foo"));
}
public void testForMapGetIteration() {
IteratorTester<Integer> tester =
new IteratorTester<Integer>(4, MODIFIABLE, newHashSet(1),
IteratorTester.KnownOrder.KNOWN_ORDER) {
private Multimap<String, Integer> multimap;
@Override protected Iterator<Integer> newTargetIterator() {
Map<String, Integer> map = Maps.newHashMap();
map.put("foo", 1);
map.put("bar", 2);
multimap = Multimaps.forMap(map);
return multimap.get("foo").iterator();
}
@Override protected void verify(List<Integer> elements) {
assertEquals(newHashSet(elements), multimap.get("foo"));
}
};
tester.ignoreSunJavaBug6529795();
tester.test();
}
private enum Color {BLUE, RED, YELLOW, GREEN}
private static abstract class CountingSupplier<E>
implements Supplier<E>, Serializable {
int count;
abstract E getImpl();
@Override
public E get() {
count++;
return getImpl();
}
}
private static class QueueSupplier extends CountingSupplier<Queue<Integer>> {
@Override public Queue<Integer> getImpl() {
return new LinkedList<Integer>();
}
private static final long serialVersionUID = 0;
}
public void testNewMultimapWithCollectionRejectingNegativeElements() {
CountingSupplier<Set<Integer>> factory = new SetSupplier() {
@Override
public Set<Integer> getImpl() {
final Set<Integer> backing = super.getImpl();
return new ForwardingSet<Integer>() {
@Override
protected Set<Integer> delegate() {
return backing;
}
@Override
public boolean add(Integer element) {
checkArgument(element >= 0);
return super.add(element);
}
@Override
public boolean addAll(Collection<? extends Integer> collection) {
return standardAddAll(collection);
}
};
}
};
Map<Color, Collection<Integer>> map = Maps.newEnumMap(Color.class);
Multimap<Color, Integer> multimap = Multimaps.newMultimap(map, factory);
try {
multimap.put(Color.BLUE, -1);
fail("Expected IllegalArgumentException");
} catch (IllegalArgumentException expected) {
// expected
}
multimap.put(Color.RED, 1);
multimap.put(Color.BLUE, 2);
try {
multimap.put(Color.GREEN, -1);
fail("Expected IllegalArgumentException");
} catch (IllegalArgumentException expected) {
// expected
}
ASSERT.that(multimap.entries()).hasContentsAnyOrder(
Maps.immutableEntry(Color.RED, 1),
Maps.immutableEntry(Color.BLUE, 2));
}
public void testNewMultimap() {
// The ubiquitous EnumArrayBlockingQueueMultimap
CountingSupplier<Queue<Integer>> factory = new QueueSupplier();
Map<Color, Collection<Integer>> map = Maps.newEnumMap(Color.class);
Multimap<Color, Integer> multimap = Multimaps.newMultimap(map, factory);
assertEquals(0, factory.count);
multimap.putAll(Color.BLUE, asList(3, 1, 4));
assertEquals(1, factory.count);
multimap.putAll(Color.RED, asList(2, 7, 1, 8));
assertEquals(2, factory.count);
assertEquals("[3, 1, 4]", multimap.get(Color.BLUE).toString());
Multimap<Color, Integer> ummodifiable =
Multimaps.unmodifiableMultimap(multimap);
assertEquals("[3, 1, 4]", ummodifiable.get(Color.BLUE).toString());
Collection<Integer> collection = multimap.get(Color.BLUE);
assertEquals(collection, collection);
assertFalse(multimap.keySet() instanceof SortedSet);
assertFalse(multimap.asMap() instanceof SortedMap);
}
@GwtIncompatible("SerializableTester")
public void testNewMultimapSerialization() {
CountingSupplier<Queue<Integer>> factory = new QueueSupplier();
Map<Color, Collection<Integer>> map = Maps.newEnumMap(Color.class);
Multimap<Color, Integer> multimap = Multimaps.newMultimap(map, factory);
multimap.putAll(Color.BLUE, asList(3, 1, 4));
multimap.putAll(Color.RED, asList(2, 7, 1, 8));
SerializableTester.reserializeAndAssert(multimap);
}
private static class ListSupplier extends
CountingSupplier<LinkedList<Integer>> {
@Override public LinkedList<Integer> getImpl() {
return new LinkedList<Integer>();
}
private static final long serialVersionUID = 0;
}
public void testNewListMultimap() {
CountingSupplier<LinkedList<Integer>> factory = new ListSupplier();
Map<Color, Collection<Integer>> map = Maps.newTreeMap();
ListMultimap<Color, Integer> multimap =
Multimaps.newListMultimap(map, factory);
assertEquals(0, factory.count);
multimap.putAll(Color.BLUE, asList(3, 1, 4, 1));
assertEquals(1, factory.count);
multimap.putAll(Color.RED, asList(2, 7, 1, 8));
assertEquals(2, factory.count);
assertEquals("{BLUE=[3, 1, 4, 1], RED=[2, 7, 1, 8]}", multimap.toString());
assertFalse(multimap.get(Color.BLUE) instanceof RandomAccess);
assertTrue(multimap.keySet() instanceof SortedSet);
assertTrue(multimap.asMap() instanceof SortedMap);
}
@GwtIncompatible("SerializableTester")
public void testNewListMultimapSerialization() {
CountingSupplier<LinkedList<Integer>> factory = new ListSupplier();
Map<Color, Collection<Integer>> map = Maps.newTreeMap();
ListMultimap<Color, Integer> multimap = Multimaps.newListMultimap(map, factory);
multimap.putAll(Color.BLUE, asList(3, 1, 4, 1));
multimap.putAll(Color.RED, asList(2, 7, 1, 8));
SerializableTester.reserializeAndAssert(multimap);
}
private static class SetSupplier extends CountingSupplier<Set<Integer>> {
@Override public Set<Integer> getImpl() {
return new HashSet<Integer>(4);
}
private static final long serialVersionUID = 0;
}
public void testNewSetMultimap() {
CountingSupplier<Set<Integer>> factory = new SetSupplier();
Map<Color, Collection<Integer>> map = Maps.newHashMap();
SetMultimap<Color, Integer> multimap =
Multimaps.newSetMultimap(map, factory);
assertEquals(0, factory.count);
multimap.putAll(Color.BLUE, asList(3, 1, 4));
assertEquals(1, factory.count);
multimap.putAll(Color.RED, asList(2, 7, 1, 8));
assertEquals(2, factory.count);
assertEquals(Sets.newHashSet(4, 3, 1), multimap.get(Color.BLUE));
}
@GwtIncompatible("SerializableTester")
public void testNewSetMultimapSerialization() {
CountingSupplier<Set<Integer>> factory = new SetSupplier();
Map<Color, Collection<Integer>> map = Maps.newHashMap();
SetMultimap<Color, Integer> multimap = Multimaps.newSetMultimap(map, factory);
multimap.putAll(Color.BLUE, asList(3, 1, 4));
multimap.putAll(Color.RED, asList(2, 7, 1, 8));
SerializableTester.reserializeAndAssert(multimap);
}
private static class SortedSetSupplier extends
CountingSupplier<TreeSet<Integer>> {
@Override public TreeSet<Integer> getImpl() {
return Sets.newTreeSet(INT_COMPARATOR);
}
private static final long serialVersionUID = 0;
}
public void testNewSortedSetMultimap() {
CountingSupplier<TreeSet<Integer>> factory = new SortedSetSupplier();
Map<Color, Collection<Integer>> map = Maps.newEnumMap(Color.class);
SortedSetMultimap<Color, Integer> multimap =
Multimaps.newSortedSetMultimap(map, factory);
// newSortedSetMultimap calls the factory once to determine the comparator.
assertEquals(1, factory.count);
multimap.putAll(Color.BLUE, asList(3, 1, 4));
assertEquals(2, factory.count);
multimap.putAll(Color.RED, asList(2, 7, 1, 8));
assertEquals(3, factory.count);
assertEquals("[4, 3, 1]", multimap.get(Color.BLUE).toString());
assertEquals(INT_COMPARATOR, multimap.valueComparator());
}
@GwtIncompatible("SerializableTester")
public void testNewSortedSetMultimapSerialization() {
CountingSupplier<TreeSet<Integer>> factory = new SortedSetSupplier();
Map<Color, Collection<Integer>> map = Maps.newEnumMap(Color.class);
SortedSetMultimap<Color, Integer> multimap = Multimaps.newSortedSetMultimap(map, factory);
multimap.putAll(Color.BLUE, asList(3, 1, 4));
multimap.putAll(Color.RED, asList(2, 7, 1, 8));
SerializableTester.reserializeAndAssert(multimap);
assertEquals(INT_COMPARATOR, multimap.valueComparator());
}
public void testIndex() {
final Multimap<String, Object> stringToObject =
new ImmutableMultimap.Builder<String, Object>()
.put("1", 1)
.put("1", 1L)
.put("1", "1")
.put("2", 2)
.put("2", 2L)
.build();
ImmutableMultimap<String, Object> outputMap =
Multimaps.index(stringToObject.values(),
Functions.toStringFunction());
assertEquals(stringToObject, outputMap);
}
public void testIndexIterator() {
final Multimap<String, Object> stringToObject =
new ImmutableMultimap.Builder<String, Object>()
.put("1", 1)
.put("1", 1L)
.put("1", "1")
.put("2", 2)
.put("2", 2L)
.build();
ImmutableMultimap<String, Object> outputMap =
Multimaps.index(stringToObject.values().iterator(),
Functions.toStringFunction());
assertEquals(stringToObject, outputMap);
}
public void testIndex_ordering() {
final Multimap<Integer, String> expectedIndex =
new ImmutableListMultimap.Builder<Integer, String>()
.put(4, "Inky")
.put(6, "Blinky")
.put(5, "Pinky")
.put(5, "Pinky")
.put(5, "Clyde")
.build();
final List<String> badGuys =
Arrays.asList("Inky", "Blinky", "Pinky", "Pinky", "Clyde");
final Function<String, Integer> stringLengthFunction =
new Function<String, Integer>() {
@Override
public Integer apply(String input) {
return input.length();
}
};
Multimap<Integer, String> index =
Multimaps.index(badGuys, stringLengthFunction);
assertEquals(expectedIndex, index);
}
public void testIndex_nullValue() {
List<Integer> values = Arrays.asList(1, null);
try {
Multimaps.index(values, Functions.identity());
fail();
} catch (NullPointerException e) {}
}
public void testIndex_nullKey() {
List<Integer> values = Arrays.asList(1, 2);
try {
Multimaps.index(values, Functions.constant(null));
fail();
} catch (NullPointerException e) {}
}
@GwtIncompatible(value = "untested")
public void testTransformValues() {
SetMultimap<String, Integer> multimap =
ImmutableSetMultimap.of("a", 2, "b", -3, "b", 3, "a", 4, "c", 6);
Function<Integer, Integer> square = new Function<Integer, Integer>() {
@Override
public Integer apply(Integer in) {
return in * in;
}
};
Multimap<String, Integer> transformed =
Multimaps.transformValues(multimap, square);
ASSERT.that(transformed.entries()).hasContentsInOrder(immutableEntry("a", 4),
immutableEntry("a", 16), immutableEntry("b", 9), immutableEntry("b", 9),
immutableEntry("c", 36));
}
@GwtIncompatible(value = "untested")
public void testTransformValuesIsView() {
Multimap<String, String> multimap = LinkedListMultimap.create();
multimap.put("a", "a");
Multimap<String, Integer> transformed =
Multimaps.transformValues(multimap, new Function<String, Integer>() {
@Override public Integer apply(String str) {
return str.length();
}
});
Entry<String, String> entry = multimap.entries().iterator().next();
entry.setValue("bbb");
ASSERT.that(transformed.entries()).hasContentsInOrder(immutableEntry("a", 3));
}
@GwtIncompatible(value = "untested")
public void testTransformListValues() {
ListMultimap<String, Integer> multimap =
ImmutableListMultimap.of("a", 2, "b", -3, "b", 3, "a", 4, "c", 6);
Function<Integer, Integer> square = new Function<Integer, Integer>() {
@Override
public Integer apply(Integer in) {
return in * in;
}
};
ListMultimap<String, Integer> transformed =
Multimaps.transformValues(multimap, square);
ASSERT.that(transformed.entries()).hasContentsInOrder(immutableEntry("a", 4),
immutableEntry("a", 16), immutableEntry("b", 9), immutableEntry("b", 9),
immutableEntry("c", 36));
}
@GwtIncompatible(value = "untested")
public void testTransformEntries() {
SetMultimap<String, Integer> multimap =
ImmutableSetMultimap.of("a", 1, "a", 4, "b", -6);
EntryTransformer<String, Integer, String> transformer =
new EntryTransformer<String, Integer, String>() {
@Override
public String transformEntry(String key, Integer value) {
return (value >= 0) ? key : "no" + key;
}
};
Multimap<String, String> transformed =
Multimaps.transformEntries(multimap, transformer);
ASSERT.that(transformed.entries()).hasContentsInOrder(immutableEntry("a", "a"),
immutableEntry("a", "a"), immutableEntry("b", "nob"));
}
@GwtIncompatible(value = "untested")
public void testTransformListEntries() {
ListMultimap<String, Integer> multimap =
ImmutableListMultimap.of("a", 1, "a", 4, "b", 6, "a", 4);
EntryTransformer<String, Integer, String> transformer =
new EntryTransformer<String, Integer, String>() {
@Override
public String transformEntry(String key, Integer value) {
return key + value;
}
};
ListMultimap<String, String> transformed =
Multimaps.transformEntries(multimap, transformer);
assertEquals(
ImmutableListMultimap.of("a", "a1", "a", "a4", "a", "a4", "b", "b6"),
transformed);
assertEquals("{a=[a1, a4, a4], b=[b6]}", transformed.toString());
}
public <K, V> void testSynchronizedMultimapSampleCodeCompilation() {
K key = null;
Multimap<K, V> multimap = Multimaps.synchronizedMultimap(
HashMultimap.<K, V>create());
Collection<V> values = multimap.get(key); // Needn't be in synchronized block
synchronized (multimap) { // Synchronizing on multimap, not values!
Iterator<V> i = values.iterator(); // Must be in synchronized block
while (i.hasNext()) {
foo(i.next());
}
}
}
private static void foo(Object o) {}
@GwtIncompatible("NullPointerTester")
public void testNullPointers() {
NullPointerTester tester = new NullPointerTester();
tester.setDefault(Multimap.class, ImmutableMultimap.of());
tester.setDefault(ListMultimap.class, ImmutableListMultimap.of());
tester.setDefault(EntryTransformer.class, ALWAYS_NULL);
tester.testAllPublicStaticMethods(Multimaps.class);
}
}