/*
* Copyright (C) 2013 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.testing.google;
import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ITERATOR_REMOVE;
import static com.google.common.collect.testing.features.CollectionSize.ONE;
import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multiset;
import com.google.common.collect.Multisets;
import com.google.common.collect.testing.Helpers;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import java.util.Iterator;
/**
* Tester for {@code Multimap.entries}.
*
* @author Louis Wasserman
*/
@GwtCompatible
public class MultimapKeysTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
@CollectionSize.Require(SEVERAL)
public void testKeys() {
resetContainer(
Helpers.mapEntry(sampleKeys().e0, sampleValues().e0),
Helpers.mapEntry(sampleKeys().e0, sampleValues().e1),
Helpers.mapEntry(sampleKeys().e1, sampleValues().e0));
Multiset<K> keys = multimap().keys();
assertEquals(2, keys.count(sampleKeys().e0));
assertEquals(1, keys.count(sampleKeys().e1));
assertEquals(3, keys.size());
assertThat(keys).has().allOf(sampleKeys().e0, sampleKeys().e1);
assertThat(keys.entrySet()).has().allOf(
Multisets.immutableEntry(sampleKeys().e0, 2),
Multisets.immutableEntry(sampleKeys().e1, 1));
}
@MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
public void testKeysCountAbsentNullKey() {
assertEquals(0, multimap().keys().count(null));
}
@CollectionSize.Require(SEVERAL)
@MapFeature.Require(ALLOWS_NULL_KEYS)
public void testKeysWithNullKey() {
resetContainer(
Helpers.mapEntry((K) null, sampleValues().e0),
Helpers.mapEntry((K) null, sampleValues().e1),
Helpers.mapEntry(sampleKeys().e1, sampleValues().e0));
Multiset<K> keys = multimap().keys();
assertEquals(2, keys.count(null));
assertEquals(1, keys.count(sampleKeys().e1));
assertEquals(3, keys.size());
assertThat(keys).has().allOf(null, sampleKeys().e1);
assertThat(keys.entrySet()).has().allOf(
Multisets.immutableEntry((K) null, 2),
Multisets.immutableEntry(sampleKeys().e1, 1));
}
public void testKeysElementSet() {
assertEquals(multimap().keySet(), multimap().keys().elementSet());
}
@MapFeature.Require(SUPPORTS_REMOVE)
public void testKeysRemove() {
int original = multimap().keys().remove(sampleKeys().e0, 1);
assertEquals(Math.max(original - 1, 0), multimap().get(sampleKeys().e0).size());
}
@CollectionSize.Require(ONE)
@CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
public void testKeysEntrySetIteratorRemove() {
Multiset<K> keys = multimap().keys();
Iterator<Multiset.Entry<K>> itr = keys.entrySet().iterator();
assertEquals(Multisets.immutableEntry(sampleKeys().e0, 1),
itr.next());
itr.remove();
assertTrue(multimap().isEmpty());
}
@CollectionSize.Require(SEVERAL)
@MapFeature.Require(SUPPORTS_REMOVE)
public void testKeysEntrySetRemove() {
resetContainer(
Helpers.mapEntry(sampleKeys().e0, sampleValues().e0),
Helpers.mapEntry(sampleKeys().e0, sampleValues().e1),
Helpers.mapEntry(sampleKeys().e1, sampleValues().e0));
assertTrue(multimap().keys().entrySet().remove(
Multisets.immutableEntry(sampleKeys().e0, 2)));
assertEquals(1, multimap().size());
assertTrue(multimap().containsEntry(sampleKeys().e1, sampleValues().e0));
}
}