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.features.CollectionFeature.SERIALIZABLE; 020 021import com.google.common.annotations.GwtCompatible; 022import com.google.common.annotations.GwtIncompatible; 023import com.google.common.annotations.J2ktIncompatible; 024import com.google.common.collect.BiMap; 025import com.google.common.collect.testing.Helpers; 026import com.google.common.collect.testing.features.CollectionFeature; 027import com.google.common.testing.SerializableTester; 028import java.io.Serializable; 029import java.lang.reflect.Method; 030import java.util.Collections; 031import java.util.List; 032import org.junit.Ignore; 033 034/** 035 * Tests for the {@code inverse} view of a BiMap. 036 * 037 * <p>This assumes that {@code bimap.inverse().inverse() == bimap}, which is not technically 038 * required but is fulfilled by all current implementations. 039 * 040 * @author Louis Wasserman 041 */ 042@GwtCompatible(emulated = true) 043@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 044public class BiMapInverseTester<K, V> extends AbstractBiMapTester<K, V> { 045 046 public void testInverseSame() { 047 assertSame(getMap(), getMap().inverse().inverse()); 048 } 049 050 @CollectionFeature.Require(SERIALIZABLE) 051 public void testInverseSerialization() { 052 BiMapPair<K, V> pair = new BiMapPair<>(getMap()); 053 BiMapPair<K, V> copy = SerializableTester.reserialize(pair); 054 assertEquals(pair.forward, copy.forward); 055 assertEquals(pair.backward, copy.backward); 056 assertSame(copy.backward, copy.forward.inverse()); 057 assertSame(copy.forward, copy.backward.inverse()); 058 } 059 060 private static class BiMapPair<K, V> implements Serializable { 061 final BiMap<K, V> forward; 062 final BiMap<V, K> backward; 063 064 BiMapPair(BiMap<K, V> original) { 065 this.forward = original; 066 this.backward = original.inverse(); 067 } 068 069 private static final long serialVersionUID = 0; 070 } 071 072 /** 073 * Returns {@link Method} instances for the tests that assume that the inverse will be the same 074 * after serialization. 075 */ 076 @J2ktIncompatible 077 @GwtIncompatible // reflection 078 public static List<Method> getInverseSameAfterSerializingMethods() { 079 return Collections.singletonList(getMethod("testInverseSerialization")); 080 } 081 082 @J2ktIncompatible 083 @GwtIncompatible // reflection 084 private static Method getMethod(String methodName) { 085 return Helpers.getMethod(BiMapInverseTester.class, methodName); 086 } 087}