1 /* 2 * Copyright (C) 2007 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.testers; 18 19 import static com.google.common.collect.testing.features.CollectionSize.ONE; 20 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 21 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS; 22 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES; 23 import static com.google.common.collect.testing.features.MapFeature.REJECTS_DUPLICATES_AT_CREATION; 24 25 import com.google.common.annotations.GwtCompatible; 26 import com.google.common.annotations.GwtIncompatible; 27 import com.google.common.collect.testing.AbstractMapTester; 28 import com.google.common.collect.testing.Helpers; 29 import com.google.common.collect.testing.features.CollectionSize; 30 import com.google.common.collect.testing.features.MapFeature; 31 32 import java.lang.reflect.Method; 33 import java.util.Arrays; 34 import java.util.List; 35 import java.util.Map.Entry; 36 37 /** 38 * A generic JUnit test which tests creation (typically through a constructor or 39 * static factory method) of a map. Can't be invoked directly; please see 40 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 41 * 42 * @author Chris Povirk 43 * @author Kevin Bourrillion 44 */ 45 @GwtCompatible(emulated = true) 46 public class MapCreationTester<K, V> extends AbstractMapTester<K, V> { 47 @MapFeature.Require(ALLOWS_NULL_KEYS) 48 @CollectionSize.Require(absent = ZERO) 49 public void testCreateWithNullKeySupported() { 50 initMapWithNullKey(); 51 expectContents(createArrayWithNullKey()); 52 } 53 54 @MapFeature.Require(absent = ALLOWS_NULL_KEYS) 55 @CollectionSize.Require(absent = ZERO) 56 public void testCreateWithNullKeyUnsupported() { 57 try { 58 initMapWithNullKey(); 59 fail("Creating a map containing a null key should fail"); 60 } catch (NullPointerException expected) { 61 } 62 } 63 64 @MapFeature.Require(ALLOWS_NULL_VALUES) 65 @CollectionSize.Require(absent = ZERO) 66 public void testCreateWithNullValueSupported() { 67 initMapWithNullValue(); 68 expectContents(createArrayWithNullValue()); 69 } 70 71 @MapFeature.Require(absent = ALLOWS_NULL_VALUES) 72 @CollectionSize.Require(absent = ZERO) 73 public void testCreateWithNullValueUnsupported() { 74 try { 75 initMapWithNullValue(); 76 fail("Creating a map containing a null value should fail"); 77 } catch (NullPointerException expected) { 78 } 79 } 80 81 @MapFeature.Require({ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES}) 82 @CollectionSize.Require(absent = ZERO) 83 public void testCreateWithNullKeyAndValueSupported() { 84 Entry<K, V>[] entries = createSamplesArray(); 85 entries[getNullLocation()] = entry(null, null); 86 resetMap(entries); 87 expectContents(entries); 88 } 89 90 @MapFeature.Require(value = ALLOWS_NULL_KEYS, 91 absent = REJECTS_DUPLICATES_AT_CREATION) 92 @CollectionSize.Require(absent = {ZERO, ONE}) 93 public void testCreateWithDuplicates_nullDuplicatesNotRejected() { 94 expectFirstRemoved(getEntriesMultipleNullKeys()); 95 } 96 97 @MapFeature.Require(absent = REJECTS_DUPLICATES_AT_CREATION) 98 @CollectionSize.Require(absent = {ZERO, ONE}) 99 public void testCreateWithDuplicates_nonNullDuplicatesNotRejected() { 100 expectFirstRemoved(getEntriesMultipleNonNullKeys()); 101 } 102 103 @MapFeature.Require({ALLOWS_NULL_KEYS, REJECTS_DUPLICATES_AT_CREATION}) 104 @CollectionSize.Require(absent = {ZERO, ONE}) 105 public void testCreateWithDuplicates_nullDuplicatesRejected() { 106 Entry<K, V>[] entries = getEntriesMultipleNullKeys(); 107 try { 108 resetMap(entries); 109 fail("Should reject duplicate null elements at creation"); 110 } catch (IllegalArgumentException expected) { 111 } 112 } 113 114 @MapFeature.Require(REJECTS_DUPLICATES_AT_CREATION) 115 @CollectionSize.Require(absent = {ZERO, ONE}) 116 public void testCreateWithDuplicates_nonNullDuplicatesRejected() { 117 Entry<K, V>[] entries = getEntriesMultipleNonNullKeys(); 118 try { 119 resetMap(entries); 120 fail("Should reject duplicate non-null elements at creation"); 121 } catch (IllegalArgumentException expected) { 122 } 123 } 124 125 private Entry<K, V>[] getEntriesMultipleNullKeys() { 126 Entry<K, V>[] entries = createArrayWithNullKey(); 127 entries[0] = entry(null, entries[0].getValue()); 128 return entries; 129 } 130 131 private Entry<K, V>[] getEntriesMultipleNonNullKeys() { 132 Entry<K, V>[] entries = createSamplesArray(); 133 entries[0] = entry(samples.e1.getKey(), samples.e0.getValue()); 134 return entries; 135 } 136 137 private void expectFirstRemoved(Entry<K, V>[] entries) { 138 resetMap(entries); 139 140 List<Entry<K, V>> expectedWithDuplicateRemoved = 141 Arrays.asList(entries).subList(1, getNumElements()); 142 expectContents(expectedWithDuplicateRemoved); 143 } 144 145 /** 146 * Returns the {@link Method} instance for {@link 147 * #testCreateWithNullKeyUnsupported()} so that tests can suppress it 148 * with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a 149 * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun 150 * bug 5045147</a> is fixed. 151 */ 152 @GwtIncompatible("reflection") 153 public static Method getCreateWithNullKeyUnsupportedMethod() { 154 return Helpers.getMethod(MapCreationTester.class, "testCreateWithNullKeyUnsupported"); 155 } 156 } 157
