| /* |
| * Copyright (C) 2008 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.testers; |
| |
| import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS; |
| import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.collect.testing.AbstractMapTester; |
| import com.google.common.collect.testing.Helpers; |
| import com.google.common.collect.testing.features.CollectionSize; |
| import com.google.common.collect.testing.features.MapFeature; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import org.junit.Ignore; |
| |
| /** |
| * Tests {@link java.util.Map#equals}. |
| * |
| * @author George van den Driessche |
| * @author Chris Povirk |
| */ |
| @GwtCompatible |
| @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. |
| public class MapEqualsTester<K, V> extends AbstractMapTester<K, V> { |
| public void testEquals_otherMapWithSameEntries() { |
| assertTrue( |
| "A Map should equal any other Map containing the same entries.", |
| getMap().equals(newHashMap(getSampleEntries()))); |
| } |
| |
| @CollectionSize.Require(absent = CollectionSize.ZERO) |
| public void testEquals_otherMapWithDifferentEntries() { |
| Map<K, V> other = newHashMap(getSampleEntries(getNumEntries() - 1)); |
| other.put(k3(), v3()); |
| assertFalse( |
| "A Map should not equal another Map containing different entries.", getMap().equals(other)); |
| } |
| |
| @CollectionSize.Require(absent = CollectionSize.ZERO) |
| @MapFeature.Require(ALLOWS_NULL_KEYS) |
| public void testEquals_containingNullKey() { |
| Collection<Entry<K, V>> entries = getSampleEntries(getNumEntries() - 1); |
| entries.add(entry(null, v3())); |
| |
| resetContainer(getSubjectGenerator().create(entries.toArray())); |
| assertTrue( |
| "A Map should equal any other Map containing the same entries," |
| + " even if some keys are null.", |
| getMap().equals(newHashMap(entries))); |
| } |
| |
| @CollectionSize.Require(absent = CollectionSize.ZERO) |
| public void testEquals_otherContainsNullKey() { |
| Collection<Entry<K, V>> entries = getSampleEntries(getNumEntries() - 1); |
| entries.add(entry(null, v3())); |
| Map<K, V> other = newHashMap(entries); |
| |
| assertFalse( |
| "Two Maps should not be equal if exactly one of them contains a null key.", |
| getMap().equals(other)); |
| } |
| |
| @CollectionSize.Require(absent = CollectionSize.ZERO) |
| @MapFeature.Require(ALLOWS_NULL_VALUES) |
| public void testEquals_containingNullValue() { |
| Collection<Entry<K, V>> entries = getSampleEntries(getNumEntries() - 1); |
| entries.add(entry(k3(), null)); |
| |
| resetContainer(getSubjectGenerator().create(entries.toArray())); |
| assertTrue( |
| "A Map should equal any other Map containing the same entries," |
| + " even if some values are null.", |
| getMap().equals(newHashMap(entries))); |
| } |
| |
| @CollectionSize.Require(absent = CollectionSize.ZERO) |
| public void testEquals_otherContainsNullValue() { |
| Collection<Entry<K, V>> entries = getSampleEntries(getNumEntries() - 1); |
| entries.add(entry(k3(), null)); |
| Map<K, V> other = newHashMap(entries); |
| |
| assertFalse( |
| "Two Maps should not be equal if exactly one of them contains a null value.", |
| getMap().equals(other)); |
| } |
| |
| @CollectionSize.Require(absent = CollectionSize.ZERO) |
| public void testEquals_smallerMap() { |
| Collection<Entry<K, V>> fewerEntries = getSampleEntries(getNumEntries() - 1); |
| assertFalse( |
| "Maps of different sizes should not be equal.", getMap().equals(newHashMap(fewerEntries))); |
| } |
| |
| public void testEquals_largerMap() { |
| Collection<Entry<K, V>> moreEntries = getSampleEntries(getNumEntries() + 1); |
| assertFalse( |
| "Maps of different sizes should not be equal.", getMap().equals(newHashMap(moreEntries))); |
| } |
| |
| public void testEquals_list() { |
| assertFalse( |
| "A List should never equal a Map.", |
| getMap().equals(Helpers.copyToList(getMap().entrySet()))); |
| } |
| |
| private static <K, V> HashMap<K, V> newHashMap( |
| Collection<? extends Entry<? extends K, ? extends V>> entries) { |
| HashMap<K, V> map = new HashMap<>(); |
| for (Entry<? extends K, ? extends V> entry : entries) { |
| map.put(entry.getKey(), entry.getValue()); |
| } |
| return map; |
| } |
| } |