001/*
002 * Copyright (C) 2012 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.google;
018
019import static com.google.common.collect.testing.Helpers.mapEntry;
020import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
021import static com.google.common.collect.testing.features.CollectionSize.ZERO;
022import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
023import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
024
025import com.google.common.annotations.GwtCompatible;
026import com.google.common.collect.Multimap;
027import com.google.common.collect.testing.features.CollectionSize;
028import com.google.common.collect.testing.features.MapFeature;
029import java.util.Collection;
030import java.util.Map.Entry;
031import org.checkerframework.checker.nullness.qual.Nullable;
032import org.junit.Ignore;
033
034/**
035 * Tester for the {@code size} methods of {@code Multimap} and its views.
036 *
037 * @author Louis Wasserman
038 */
039@GwtCompatible
040@Ignore("test runners must not instantiate and run this directly, only via suites we build")
041// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
042@SuppressWarnings("JUnit4ClassUsedInJUnit3")
043@ElementTypesAreNonnullByDefault
044public class MultimapSizeTester<K extends @Nullable Object, V extends @Nullable Object>
045    extends AbstractMultimapTester<K, V, Multimap<K, V>> {
046
047  public void testSize() {
048    int expectedSize = getNumElements();
049    Multimap<K, V> multimap = multimap();
050    assertEquals(expectedSize, multimap.size());
051
052    int size = 0;
053    for (Entry<K, V> entry : multimap.entries()) {
054      assertTrue(multimap.containsEntry(entry.getKey(), entry.getValue()));
055      size++;
056    }
057    assertEquals(expectedSize, size);
058
059    int size2 = 0;
060    for (Entry<K, Collection<V>> entry2 : multimap.asMap().entrySet()) {
061      size2 += entry2.getValue().size();
062    }
063    assertEquals(expectedSize, size2);
064  }
065
066  @CollectionSize.Require(ZERO)
067  public void testIsEmptyYes() {
068    assertTrue(multimap().isEmpty());
069  }
070
071  @CollectionSize.Require(absent = ZERO)
072  public void testIsEmptyNo() {
073    assertFalse(multimap().isEmpty());
074  }
075
076  @CollectionSize.Require(absent = ZERO)
077  @MapFeature.Require(ALLOWS_NULL_KEYS)
078  public void testSizeNullKey() {
079    initMultimapWithNullKey();
080    assertEquals(getNumElements(), multimap().size());
081    assertFalse(multimap().isEmpty());
082  }
083
084  @CollectionSize.Require(absent = ZERO)
085  @MapFeature.Require(ALLOWS_NULL_VALUES)
086  public void testSizeNullValue() {
087    initMultimapWithNullValue();
088    assertEquals(getNumElements(), multimap().size());
089    assertFalse(multimap().isEmpty());
090  }
091
092  @CollectionSize.Require(absent = ZERO)
093  @MapFeature.Require({ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES})
094  public void testSizeNullKeyAndValue() {
095    initMultimapWithNullKeyAndValue();
096    assertEquals(getNumElements(), multimap().size());
097    assertFalse(multimap().isEmpty());
098  }
099
100  @CollectionSize.Require(SEVERAL)
101  public void testSizeMultipleValues() {
102    resetContainer(mapEntry(k0(), v0()), mapEntry(k0(), v1()), mapEntry(k0(), v2()));
103
104    assertEquals(3, multimap().size());
105    assertEquals(3, multimap().entries().size());
106    assertEquals(3, multimap().keys().size());
107
108    assertEquals(1, multimap().keySet().size());
109    assertEquals(1, multimap().asMap().size());
110  }
111}