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.jspecify.annotations.NullMarked; 032import org.jspecify.annotations.Nullable; 033import org.junit.Ignore; 034 035/** 036 * Tester for the {@code size} methods of {@code Multimap} and its views. 037 * 038 * @author Louis Wasserman 039 */ 040@GwtCompatible 041@Ignore("test runners must not instantiate and run this directly, only via suites we build") 042// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 043@SuppressWarnings("JUnit4ClassUsedInJUnit3") 044@NullMarked 045public class MultimapSizeTester<K extends @Nullable Object, V extends @Nullable Object> 046 extends AbstractMultimapTester<K, V, Multimap<K, V>> { 047 048 public void testSize() { 049 int expectedSize = getNumElements(); 050 Multimap<K, V> multimap = multimap(); 051 assertEquals(expectedSize, multimap.size()); 052 053 int size = 0; 054 for (Entry<K, V> entry : multimap.entries()) { 055 assertTrue(multimap.containsEntry(entry.getKey(), entry.getValue())); 056 size++; 057 } 058 assertEquals(expectedSize, size); 059 060 int size2 = 0; 061 for (Entry<K, Collection<V>> entry2 : multimap.asMap().entrySet()) { 062 size2 += entry2.getValue().size(); 063 } 064 assertEquals(expectedSize, size2); 065 } 066 067 @CollectionSize.Require(ZERO) 068 public void testIsEmptyYes() { 069 assertTrue(multimap().isEmpty()); 070 } 071 072 @CollectionSize.Require(absent = ZERO) 073 public void testIsEmptyNo() { 074 assertFalse(multimap().isEmpty()); 075 } 076 077 @CollectionSize.Require(absent = ZERO) 078 @MapFeature.Require(ALLOWS_NULL_KEYS) 079 public void testSizeNullKey() { 080 initMultimapWithNullKey(); 081 assertEquals(getNumElements(), multimap().size()); 082 assertFalse(multimap().isEmpty()); 083 } 084 085 @CollectionSize.Require(absent = ZERO) 086 @MapFeature.Require(ALLOWS_NULL_VALUES) 087 public void testSizeNullValue() { 088 initMultimapWithNullValue(); 089 assertEquals(getNumElements(), multimap().size()); 090 assertFalse(multimap().isEmpty()); 091 } 092 093 @CollectionSize.Require(absent = ZERO) 094 @MapFeature.Require({ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES}) 095 public void testSizeNullKeyAndValue() { 096 initMultimapWithNullKeyAndValue(); 097 assertEquals(getNumElements(), multimap().size()); 098 assertFalse(multimap().isEmpty()); 099 } 100 101 @CollectionSize.Require(SEVERAL) 102 public void testSizeMultipleValues() { 103 resetContainer(mapEntry(k0(), v0()), mapEntry(k0(), v1()), mapEntry(k0(), v2())); 104 105 assertEquals(3, multimap().size()); 106 assertEquals(3, multimap().entries().size()); 107 assertEquals(3, multimap().keys().size()); 108 109 assertEquals(1, multimap().keySet().size()); 110 assertEquals(1, multimap().asMap().size()); 111 } 112}