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.ZERO; 20 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS; 21 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES; 22 import static com.google.common.collect.testing.features.MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION; 23 import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT; 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.ConcurrentModificationException; 34 import java.util.Iterator; 35 import java.util.Map; 36 import java.util.Map.Entry; 37 38 /** 39 * A generic JUnit test which tests {@code put} operations on a map. Can't be 40 * invoked directly; please see 41 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 42 * 43 * @author Chris Povirk 44 * @author Kevin Bourrillion 45 */ 46 @SuppressWarnings("unchecked") // too many "unchecked generic array creations" 47 @GwtCompatible(emulated = true) 48 public class MapPutTester<K, V> extends AbstractMapTester<K, V> { 49 private Entry<K, V> nullKeyEntry; 50 private Entry<K, V> nullValueEntry; 51 private Entry<K, V> nullKeyValueEntry; 52 private Entry<K, V> presentKeyNullValueEntry; 53 54 @Override public void setUp() throws Exception { 55 super.setUp(); 56 nullKeyEntry = entry(null, samples.e3.getValue()); 57 nullValueEntry = entry(samples.e3.getKey(), null); 58 nullKeyValueEntry = entry(null, null); 59 presentKeyNullValueEntry = entry(samples.e0.getKey(), null); 60 } 61 62 @MapFeature.Require(SUPPORTS_PUT) 63 public void testPut_supportedNotPresent() { 64 assertNull("put(notPresent, value) should return null", put(samples.e3)); 65 expectAdded(samples.e3); 66 } 67 68 @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_PUT}) 69 @CollectionSize.Require(absent = ZERO) 70 public void testPutAbsentConcurrentWithEntrySetIteration() { 71 try { 72 Iterator<Entry<K, V>> iterator = getMap().entrySet().iterator(); 73 put(samples.e3); 74 iterator.next(); 75 fail("Expected ConcurrentModificationException"); 76 } catch (ConcurrentModificationException expected) { 77 // success 78 } 79 } 80 81 @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_PUT}) 82 @CollectionSize.Require(absent = ZERO) 83 public void testPutAbsentConcurrentWithKeySetIteration() { 84 try { 85 Iterator<K> iterator = getMap().keySet().iterator(); 86 put(samples.e3); 87 iterator.next(); 88 fail("Expected ConcurrentModificationException"); 89 } catch (ConcurrentModificationException expected) { 90 // success 91 } 92 } 93 94 @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_PUT}) 95 @CollectionSize.Require(absent = ZERO) 96 public void testPutAbsentConcurrentWithValueIteration() { 97 try { 98 Iterator<V> iterator = getMap().values().iterator(); 99 put(samples.e3); 100 iterator.next(); 101 fail("Expected ConcurrentModificationException"); 102 } catch (ConcurrentModificationException expected) { 103 // success 104 } 105 } 106 107 @MapFeature.Require(absent = SUPPORTS_PUT) 108 public void testPut_unsupportedNotPresent() { 109 try { 110 put(samples.e3); 111 fail("put(notPresent, value) should throw"); 112 } catch (UnsupportedOperationException expected) { 113 } 114 expectUnchanged(); 115 expectMissing(samples.e3); 116 } 117 118 @MapFeature.Require(absent = SUPPORTS_PUT) 119 @CollectionSize.Require(absent = ZERO) 120 public void testPut_unsupportedPresentExistingValue() { 121 try { 122 assertEquals("put(present, existingValue) should return present or throw", 123 samples.e0.getValue(), put(samples.e0)); 124 } catch (UnsupportedOperationException tolerated) { 125 } 126 expectUnchanged(); 127 } 128 129 @MapFeature.Require(absent = SUPPORTS_PUT) 130 @CollectionSize.Require(absent = ZERO) 131 public void testPut_unsupportedPresentDifferentValue() { 132 try { 133 getMap().put(samples.e0.getKey(), samples.e3.getValue()); 134 fail("put(present, differentValue) should throw"); 135 } catch (UnsupportedOperationException expected) { 136 } 137 expectUnchanged(); 138 } 139 140 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS}) 141 public void testPut_nullKeySupportedNotPresent() { 142 assertNull("put(null, value) should return null", put(nullKeyEntry)); 143 expectAdded(nullKeyEntry); 144 } 145 146 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS}) 147 @CollectionSize.Require(absent = ZERO) 148 public void testPut_nullKeySupportedPresent() { 149 Entry<K, V> newEntry = entry(null, samples.e3.getValue()); 150 initMapWithNullKey(); 151 assertEquals("put(present, value) should return the associated value", 152 getValueForNullKey(), put(newEntry)); 153 154 Entry<K, V>[] expected = createArrayWithNullKey(); 155 expected[getNullLocation()] = newEntry; 156 expectContents(expected); 157 } 158 159 @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEYS) 160 public void testPut_nullKeyUnsupported() { 161 try { 162 put(nullKeyEntry); 163 fail("put(null, value) should throw"); 164 } catch (NullPointerException expected) { 165 } 166 expectUnchanged(); 167 expectNullKeyMissingWhenNullKeysUnsupported( 168 "Should not contain null key after unsupported put(null, value)"); 169 } 170 171 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES}) 172 public void testPut_nullValueSupported() { 173 assertNull("put(key, null) should return null", put(nullValueEntry)); 174 expectAdded(nullValueEntry); 175 } 176 177 @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES) 178 public void testPut_nullValueUnsupported() { 179 try { 180 put(nullValueEntry); 181 fail("put(key, null) should throw"); 182 } catch (NullPointerException expected) { 183 } 184 expectUnchanged(); 185 expectNullValueMissingWhenNullValuesUnsupported( 186 "Should not contain null value after unsupported put(key, null)"); 187 } 188 189 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES}) 190 @CollectionSize.Require(absent = ZERO) 191 public void testPut_replaceWithNullValueSupported() { 192 assertEquals("put(present, null) should return the associated value", 193 samples.e0.getValue(), put(presentKeyNullValueEntry)); 194 expectReplacement(presentKeyNullValueEntry); 195 } 196 197 @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES) 198 @CollectionSize.Require(absent = ZERO) 199 public void testPut_replaceWithNullValueUnsupported() { 200 try { 201 put(presentKeyNullValueEntry); 202 fail("put(present, null) should throw"); 203 } catch (NullPointerException expected) { 204 } 205 expectUnchanged(); 206 expectNullValueMissingWhenNullValuesUnsupported( 207 "Should not contain null after unsupported put(present, null)"); 208 } 209 210 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES}) 211 @CollectionSize.Require(absent = ZERO) 212 public void testPut_replaceNullValueWithNullSupported() { 213 initMapWithNullValue(); 214 assertNull("put(present, null) should return the associated value (null)", 215 getMap().put(getKeyForNullValue(), null)); 216 expectContents(createArrayWithNullValue()); 217 } 218 219 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES}) 220 @CollectionSize.Require(absent = ZERO) 221 public void testPut_replaceNullValueWithNonNullSupported() { 222 Entry<K, V> newEntry = entry(getKeyForNullValue(), samples.e3.getValue()); 223 initMapWithNullValue(); 224 assertNull("put(present, value) should return the associated value (null)", 225 put(newEntry)); 226 227 Entry<K, V>[] expected = createArrayWithNullValue(); 228 expected[getNullLocation()] = newEntry; 229 expectContents(expected); 230 } 231 232 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES}) 233 public void testPut_nullKeyAndValueSupported() { 234 assertNull("put(null, null) should return null", put(nullKeyValueEntry)); 235 expectAdded(nullKeyValueEntry); 236 } 237 238 private V put(Map.Entry<K, V> entry) { 239 return getMap().put(entry.getKey(), entry.getValue()); 240 } 241 242 /** 243 * Returns the {@link Method} instance for {@link 244 * #testPut_nullKeyUnsupported()} so that tests of {@link java.util.TreeMap} 245 * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} 246 * until <a 247 * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 248 * 5045147</a> is fixed. 249 */ 250 @GwtIncompatible("reflection") 251 public static Method getPutNullKeyUnsupportedMethod() { 252 return Helpers.getMethod(MapPutTester.class, "testPut_nullKeyUnsupported"); 253 } 254 } 255
