001/* 002 * Copyright (C) 2015 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.testers; 018 019import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER; 020import static com.google.common.collect.testing.features.CollectionSize.ZERO; 021import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS; 022import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES; 023import static java.util.Arrays.asList; 024 025import com.google.common.annotations.GwtCompatible; 026import com.google.common.collect.testing.AbstractMapTester; 027import com.google.common.collect.testing.Helpers; 028import com.google.common.collect.testing.features.CollectionFeature; 029import com.google.common.collect.testing.features.CollectionSize; 030import com.google.common.collect.testing.features.MapFeature; 031import java.util.ArrayList; 032import java.util.List; 033import java.util.Map; 034import java.util.Map.Entry; 035import org.junit.Ignore; 036 037/** 038 * A generic JUnit test which tests {@link Map#forEach}. Can't be invoked directly; please see 039 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 040 * 041 * @author Louis Wasserman 042 */ 043@GwtCompatible 044@Ignore("test runners must not instantiate and run this directly, only via suites we build") 045// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 046@SuppressWarnings("JUnit4ClassUsedInJUnit3") 047@IgnoreJRERequirement // We opt into library desugaring for our tests. 048public class MapForEachTester<K, V> extends AbstractMapTester<K, V> { 049 @CollectionFeature.Require(KNOWN_ORDER) 050 public void testForEachKnownOrder() { 051 List<Entry<K, V>> entries = new ArrayList<>(); 052 getMap().forEach((k, v) -> entries.add(entry(k, v))); 053 assertEquals(getOrderedElements(), entries); 054 } 055 056 @CollectionFeature.Require(absent = KNOWN_ORDER) 057 public void testForEachUnknownOrder() { 058 List<Entry<K, V>> entries = new ArrayList<>(); 059 getMap().forEach((k, v) -> entries.add(entry(k, v))); 060 Helpers.assertEqualIgnoringOrder(getSampleEntries(), entries); 061 } 062 063 @MapFeature.Require(ALLOWS_NULL_KEYS) 064 @CollectionSize.Require(absent = ZERO) 065 public void testForEach_nullKeys() { 066 initMapWithNullKey(); 067 List<Entry<K, V>> expectedEntries = asList(createArrayWithNullKey()); 068 List<Entry<K, V>> entries = new ArrayList<>(); 069 getMap().forEach((k, v) -> entries.add(entry(k, v))); 070 Helpers.assertEqualIgnoringOrder(expectedEntries, entries); 071 } 072 073 @MapFeature.Require(ALLOWS_NULL_VALUES) 074 @CollectionSize.Require(absent = ZERO) 075 public void testForEach_nullValues() { 076 initMapWithNullValue(); 077 List<Entry<K, V>> expectedEntries = asList(createArrayWithNullValue()); 078 List<Entry<K, V>> entries = new ArrayList<>(); 079 getMap().forEach((k, v) -> entries.add(entry(k, v))); 080 Helpers.assertEqualIgnoringOrder(expectedEntries, entries); 081 } 082}