/*
* 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.truth.Truth.assertThat;
import static java.util.Arrays.asList;
import com.google.common.annotations.GwtCompatible;
import com.google.common.testing.EqualsTester;
import junit.framework.TestCase;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
/**
* Unit tests for {@code LinkedHashMultimap}.
*
* @author Jared Levy
*/
@GwtCompatible(emulated = true)
public class LinkedHashMultimapTest extends TestCase {
public void testValueSetHashTableExpansion() {
LinkedHashMultimap<String, Integer> multimap = LinkedHashMultimap.create();
for (int z = 1; z <= 100; z++) {
multimap.put("a", z);
// The Eclipse compiler (and hence GWT) rejects a parameterized cast.
@SuppressWarnings("unchecked")
LinkedHashMultimap<String, Integer>.ValueSet valueSet =
(LinkedHashMultimap.ValueSet) multimap.backingMap().get("a");
assertEquals(z, valueSet.size());
assertFalse(Hashing.needsResizing(valueSet.size(), valueSet.hashTable.length,
LinkedHashMultimap.VALUE_SET_LOAD_FACTOR));
}
}
private Multimap<String, Integer> initializeMultimap5() {
Multimap<String, Integer> multimap = LinkedHashMultimap.create();
multimap.put("foo", 5);
multimap.put("bar", 4);
multimap.put("foo", 3);
multimap.put("cow", 2);
multimap.put("bar", 1);
return multimap;
}
public void testToString() {
Multimap<String, Integer> multimap = LinkedHashMultimap.create();
multimap.put("foo", 3);
multimap.put("bar", 1);
multimap.putAll("foo", Arrays.asList(-1, 2, 4));
multimap.putAll("bar", Arrays.asList(2, 3));
multimap.put("foo", 1);
assertEquals("{foo=[3, -1, 2, 4, 1], bar=[1, 2, 3]}",
multimap.toString());
}
public void testOrderingReadOnly() {
Multimap<String, Integer> multimap = initializeMultimap5();
assertOrderingReadOnly(multimap);
}
public void testOrderingUnmodifiable() {
Multimap<String, Integer> multimap = initializeMultimap5();
assertOrderingReadOnly(Multimaps.unmodifiableMultimap(multimap));
}
public void testOrderingSynchronized() {
Multimap<String, Integer> multimap = initializeMultimap5();
assertOrderingReadOnly(Multimaps.synchronizedMultimap(multimap));
}
private void assertOrderingReadOnly(Multimap<String, Integer> multimap) {
assertThat(multimap.get("foo")).has().exactly(5, 3).inOrder();
assertThat(multimap.get("bar")).has().exactly(4, 1).inOrder();
assertThat(multimap.get("cow")).has().item(2);
assertThat(multimap.keySet()).has().exactly("foo", "bar", "cow").inOrder();
assertThat(multimap.values()).has().exactly(5, 4, 3, 2, 1).inOrder();
Iterator<Map.Entry<String, Integer>> entryIterator =
multimap.entries().iterator();
assertEquals(Maps.immutableEntry("foo", 5), entryIterator.next());
assertEquals(Maps.immutableEntry("bar", 4), entryIterator.next());
assertEquals(Maps.immutableEntry("foo", 3), entryIterator.next());
assertEquals(Maps.immutableEntry("cow", 2), entryIterator.next());
assertEquals(Maps.immutableEntry("bar", 1), entryIterator.next());
Iterator<Map.Entry<String, Collection<Integer>>> collectionIterator =
multimap.asMap().entrySet().iterator();
Map.Entry<String, Collection<Integer>> entry = collectionIterator.next();
assertEquals("foo", entry.getKey());
assertThat(entry.getValue()).has().exactly(5, 3).inOrder();
entry = collectionIterator.next();
assertEquals("bar", entry.getKey());
assertThat(entry.getValue()).has().exactly(4, 1).inOrder();
entry = collectionIterator.next();
assertEquals("cow", entry.getKey());
assertThat(entry.getValue()).has().item(2);
}
public void testOrderingUpdates() {
Multimap<String, Integer> multimap = initializeMultimap5();
assertThat(multimap.replaceValues("foo", asList(6, 7))).has().exactly(5, 3).inOrder();
assertThat(multimap.keySet()).has().exactly("foo", "bar", "cow").inOrder();
assertThat(multimap.removeAll("foo")).has().exactly(6, 7).inOrder();
assertThat(multimap.keySet()).has().exactly("bar", "cow").inOrder();
assertTrue(multimap.remove("bar", 4));
assertThat(multimap.keySet()).has().exactly("bar", "cow").inOrder();
assertTrue(multimap.remove("bar", 1));
assertThat(multimap.keySet()).has().item("cow");
multimap.put("bar", 9);
assertThat(multimap.keySet()).has().exactly("cow", "bar").inOrder();
}
public void testToStringNullExact() {
Multimap<String, Integer> multimap = LinkedHashMultimap.create();
multimap.put("foo", 3);
multimap.put("foo", -1);
multimap.put(null, null);
multimap.put("bar", 1);
multimap.put("foo", 2);
multimap.put(null, 0);
multimap.put("bar", 2);
multimap.put("bar", null);
multimap.put("foo", null);
multimap.put("foo", 4);
multimap.put(null, -1);
multimap.put("bar", 3);
multimap.put("bar", 1);
multimap.put("foo", 1);
assertEquals(
"{foo=[3, -1, 2, null, 4, 1], null=[null, 0, -1], bar=[1, 2, null, 3]}",
multimap.toString());
}
public void testPutMultimapOrdered() {
Multimap<String, Integer> multimap = LinkedHashMultimap.create();
multimap.putAll(initializeMultimap5());
assertOrderingReadOnly(multimap);
}
public void testKeysToString_ordering() {
Multimap<String, Integer> multimap = initializeMultimap5();
assertEquals("[foo x 2, bar x 2, cow]", multimap.keys().toString());
}
public void testCreate() {
LinkedHashMultimap<String, Integer> multimap = LinkedHashMultimap.create();
multimap.put("foo", 1);
multimap.put("bar", 2);
multimap.put("foo", 3);
assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
}
public void testCreateFromMultimap() {
Multimap<String, Integer> multimap = LinkedHashMultimap.create();
multimap.put("a", 1);
multimap.put("b", 2);
multimap.put("a", 3);
multimap.put("c", 4);
LinkedHashMultimap<String, Integer> copy =
LinkedHashMultimap.create(multimap);
new EqualsTester()
.addEqualityGroup(multimap, copy)
.testEquals();
}
public void testCreateFromSizes() {
LinkedHashMultimap<String, Integer> multimap
= LinkedHashMultimap.create(20, 15);
multimap.put("foo", 1);
multimap.put("bar", 2);
multimap.put("foo", 3);
assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
}
public void testCreateFromIllegalSizes() {
try {
LinkedHashMultimap.create(-20, 15);
fail();
} catch (IllegalArgumentException expected) {}
try {
LinkedHashMultimap.create(20, -15);
fail();
} catch (IllegalArgumentException expected) {}
}
}