001/* 002 * Copyright (C) 2016 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.Helpers.mapEntry; 020import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER; 021import static com.google.common.collect.testing.features.CollectionSize.ZERO; 022import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT; 023import static com.google.common.collect.testing.testers.ReflectionFreeAssertThrows.assertThrows; 024 025import com.google.common.annotations.GwtCompatible; 026import com.google.common.collect.testing.AbstractMapTester; 027import com.google.common.collect.testing.SampleElements; 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.Entry; 034import org.junit.Ignore; 035 036/** 037 * A generic JUnit test which tests {@code replaceAll()} operations on a map. Can't be invoked 038 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 039 * 040 * @author Louis Wasserman 041 */ 042@GwtCompatible 043@Ignore("test runners must not instantiate and run this directly, only via suites we build") 044// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 045@SuppressWarnings("JUnit4ClassUsedInJUnit3") 046public class MapReplaceAllTester<K, V> extends AbstractMapTester<K, V> { 047 private SampleElements<K> keys() { 048 return new SampleElements<>(k0(), k1(), k2(), k3(), k4()); 049 } 050 051 private SampleElements<V> values() { 052 return new SampleElements<>(v0(), v1(), v2(), v3(), v4()); 053 } 054 055 @MapFeature.Require(SUPPORTS_PUT) 056 public void testReplaceAllRotate() { 057 getMap() 058 .replaceAll( 059 (K k, V v) -> { 060 int index = keys().asList().indexOf(k); 061 return values().asList().get(index + 1); 062 }); 063 List<Entry<K, V>> expectedEntries = new ArrayList<>(); 064 for (Entry<K, V> entry : getSampleEntries()) { 065 int index = keys().asList().indexOf(entry.getKey()); 066 expectedEntries.add(mapEntry(entry.getKey(), values().asList().get(index + 1))); 067 } 068 expectContents(expectedEntries); 069 } 070 071 @MapFeature.Require(SUPPORTS_PUT) 072 @CollectionFeature.Require(KNOWN_ORDER) 073 public void testReplaceAllPreservesOrder() { 074 getMap() 075 .replaceAll( 076 (K k, V v) -> { 077 int index = keys().asList().indexOf(k); 078 return values().asList().get(index + 1); 079 }); 080 List<Entry<K, V>> orderedEntries = getOrderedElements(); 081 int index = 0; 082 for (K key : getMap().keySet()) { 083 assertEquals(orderedEntries.get(index).getKey(), key); 084 index++; 085 } 086 } 087 088 @MapFeature.Require(absent = SUPPORTS_PUT) 089 @CollectionSize.Require(absent = ZERO) 090 public void testReplaceAll_unsupported() { 091 assertThrows( 092 UnsupportedOperationException.class, 093 () -> 094 getMap() 095 .replaceAll( 096 (K k, V v) -> { 097 int index = keys().asList().indexOf(k); 098 return values().asList().get(index + 1); 099 })); 100 expectUnchanged(); 101 } 102 103 @MapFeature.Require(absent = SUPPORTS_PUT) 104 @CollectionSize.Require(ZERO) 105 public void testReplaceAll_unsupportedByEmptyCollection() { 106 try { 107 getMap() 108 .replaceAll( 109 (K k, V v) -> { 110 int index = keys().asList().indexOf(k); 111 return values().asList().get(index + 1); 112 }); 113 } catch (UnsupportedOperationException tolerated) { 114 } 115 expectUnchanged(); 116 } 117 118 @MapFeature.Require(absent = SUPPORTS_PUT) 119 public void testReplaceAll_unsupportedNoOpFunction() { 120 try { 121 getMap().replaceAll((K k, V v) -> v); 122 } catch (UnsupportedOperationException tolerated) { 123 } 124 expectUnchanged(); 125 } 126}