1 /* 2 * Copyright (C) 2012 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.collect.testing.google; 18 19 import static com.google.common.collect.testing.features.CollectionFeature.SERIALIZABLE; 20 21 import com.google.common.annotations.GwtCompatible; 22 import com.google.common.annotations.GwtIncompatible; 23 import com.google.common.collect.BiMap; 24 import com.google.common.collect.testing.Helpers; 25 import com.google.common.collect.testing.features.CollectionFeature; 26 import com.google.common.testing.SerializableTester; 27 28 import java.io.Serializable; 29 import java.lang.reflect.Method; 30 import java.util.Collections; 31 import java.util.List; 32 33 /** 34 * Tests for the {@code inverse} view of a BiMap. 35 * 36 * <p>This assumes that {@code bimap.inverse().inverse() == bimap}, which is not technically 37 * required but is fulfilled by all current implementations. 38 * 39 * @author Louis Wasserman 40 */ 41 @GwtCompatible(emulated = true) 42 public class BiMapInverseTester<K, V> extends AbstractBiMapTester<K, V> { 43 44 public void testInverseSame() { 45 assertSame(getMap(), getMap().inverse().inverse()); 46 } 47 48 @CollectionFeature.Require(SERIALIZABLE) 49 public void testInverseSerialization() { 50 BiMapPair<K, V> pair = new BiMapPair<K, V>(getMap()); 51 BiMapPair<K, V> copy = SerializableTester.reserialize(pair); 52 assertEquals(pair.forward, copy.forward); 53 assertEquals(pair.backward, copy.backward); 54 assertSame(copy.backward, copy.forward.inverse()); 55 assertSame(copy.forward, copy.backward.inverse()); 56 } 57 58 private static class BiMapPair<K, V> implements Serializable { 59 final BiMap<K, V> forward; 60 final BiMap<V, K> backward; 61 62 BiMapPair(BiMap<K, V> original) { 63 this.forward = original; 64 this.backward = original.inverse(); 65 } 66 67 private static final long serialVersionUID = 0; 68 } 69 70 /** 71 * Returns {@link Method} instances for the tests that assume that the inverse will be the same 72 * after serialization. 73 */ 74 @GwtIncompatible("reflection") 75 public static List<Method> getInverseSameAfterSerializingMethods() { 76 return Collections.singletonList(getMethod("testInverseSerialization")); 77 } 78 79 @GwtIncompatible("reflection") 80 private static Method getMethod(String methodName) { 81 return Helpers.getMethod(BiMapInverseTester.class, methodName); 82 } 83 84 } 85
