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.SUPPORTS_PUT; 23 24 import com.google.common.collect.testing.AbstractMapTester; 25 import com.google.common.collect.testing.features.CollectionSize; 26 import com.google.common.collect.testing.features.MapFeature; 27 28 import java.util.Map; 29 import java.util.Map.Entry; 30 31 /** 32 * A generic JUnit test which tests {@code put} operations on a map. Can't be 33 * invoked directly; please see 34 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 35 * 36 * <p>This class is GWT compatible. 37 * 38 * @author Chris Povirk 39 * @author Kevin Bourrillion 40 */ 41 @SuppressWarnings("unchecked") // too many "unchecked generic array creations" 42 public class MapPutTester<K, V> extends AbstractMapTester<K, V> { 43 private Entry<K, V> nullKeyEntry; 44 private Entry<K, V> nullValueEntry; 45 private Entry<K, V> nullKeyValueEntry; 46 private Entry<K, V> presentKeyNullValueEntry; 47 48 @Override public void setUp() throws Exception { 49 super.setUp(); 50 nullKeyEntry = entry(null, samples.e3.getValue()); 51 nullValueEntry = entry(samples.e3.getKey(), null); 52 nullKeyValueEntry = entry(null, null); 53 presentKeyNullValueEntry = entry(samples.e0.getKey(), null); 54 } 55 56 @MapFeature.Require(SUPPORTS_PUT) 57 public void testPut_supportedNotPresent() { 58 assertNull("put(notPresent, value) should return null", put(samples.e3)); 59 expectAdded(samples.e3); 60 } 61 62 @MapFeature.Require(absent = SUPPORTS_PUT) 63 public void testPut_unsupportedNotPresent() { 64 try { 65 put(samples.e3); 66 fail("put(notPresent, value) should throw"); 67 } catch (UnsupportedOperationException expected) { 68 } 69 expectUnchanged(); 70 expectMissing(samples.e3); 71 } 72 73 @MapFeature.Require(absent = SUPPORTS_PUT) 74 @CollectionSize.Require(absent = ZERO) 75 public void testPut_unsupportedPresentExistingValue() { 76 try { 77 assertEquals("put(present, existingValue) should return present or throw", 78 samples.e0.getValue(), put(samples.e0)); 79 } catch (UnsupportedOperationException tolerated) { 80 } 81 expectUnchanged(); 82 } 83 84 @MapFeature.Require(absent = SUPPORTS_PUT) 85 @CollectionSize.Require(absent = ZERO) 86 public void testPut_unsupportedPresentDifferentValue() { 87 try { 88 getMap().put(samples.e0.getKey(), samples.e3.getValue()); 89 fail("put(present, differentValue) should throw"); 90 } catch (UnsupportedOperationException expected) { 91 } 92 expectUnchanged(); 93 } 94 95 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS}) 96 public void testPut_nullKeySupportedNotPresent() { 97 assertNull("put(null, value) should return null", put(nullKeyEntry)); 98 expectAdded(nullKeyEntry); 99 } 100 101 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS}) 102 @CollectionSize.Require(absent = ZERO) 103 public void testPut_nullKeySupportedPresent() { 104 Entry<K, V> newEntry = entry(null, samples.e3.getValue()); 105 initMapWithNullKey(); 106 assertEquals("put(present, value) should return the associated value", 107 getValueForNullKey(), put(newEntry)); 108 109 Entry<K, V>[] expected = createArrayWithNullKey(); 110 expected[getNullLocation()] = newEntry; 111 expectContents(expected); 112 } 113 114 @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEYS) 115 public void testPut_nullKeyUnsupported() { 116 try { 117 put(nullKeyEntry); 118 fail("put(null, value) should throw"); 119 } catch (NullPointerException expected) { 120 } 121 expectUnchanged(); 122 expectNullKeyMissingWhenNullKeysUnsupported( 123 "Should not contain null key after unsupported put(null, value)"); 124 } 125 126 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES}) 127 public void testPut_nullValueSupported() { 128 assertNull("put(key, null) should return null", put(nullValueEntry)); 129 expectAdded(nullValueEntry); 130 } 131 132 @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES) 133 public void testPut_nullValueUnsupported() { 134 try { 135 put(nullValueEntry); 136 fail("put(key, null) should throw"); 137 } catch (NullPointerException expected) { 138 } 139 expectUnchanged(); 140 expectNullValueMissingWhenNullValuesUnsupported( 141 "Should not contain null value after unsupported put(key, null)"); 142 } 143 144 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES}) 145 @CollectionSize.Require(absent = ZERO) 146 public void testPut_replaceWithNullValueSupported() { 147 assertEquals("put(present, null) should return the associated value", 148 samples.e0.getValue(), put(presentKeyNullValueEntry)); 149 expectReplacement(presentKeyNullValueEntry); 150 } 151 152 @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES) 153 @CollectionSize.Require(absent = ZERO) 154 public void testPut_replaceWithNullValueUnsupported() { 155 try { 156 put(presentKeyNullValueEntry); 157 fail("put(present, null) should throw"); 158 } catch (NullPointerException expected) { 159 } 160 expectUnchanged(); 161 expectNullValueMissingWhenNullValuesUnsupported( 162 "Should not contain null after unsupported put(present, null)"); 163 } 164 165 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES}) 166 @CollectionSize.Require(absent = ZERO) 167 public void testPut_replaceNullValueWithNullSupported() { 168 initMapWithNullValue(); 169 assertNull("put(present, null) should return the associated value (null)", 170 getMap().put(getKeyForNullValue(), null)); 171 expectContents(createArrayWithNullValue()); 172 } 173 174 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES}) 175 @CollectionSize.Require(absent = ZERO) 176 public void testPut_replaceNullValueWithNonNullSupported() { 177 Entry<K, V> newEntry = entry(getKeyForNullValue(), samples.e3.getValue()); 178 initMapWithNullValue(); 179 assertNull("put(present, value) should return the associated value (null)", 180 put(newEntry)); 181 182 Entry<K, V>[] expected = createArrayWithNullValue(); 183 expected[getNullLocation()] = newEntry; 184 expectContents(expected); 185 } 186 187 @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES}) 188 public void testPut_nullKeyAndValueSupported() { 189 assertNull("put(null, null) should return null", put(nullKeyValueEntry)); 190 expectAdded(nullKeyValueEntry); 191 } 192 193 private V put(Map.Entry<K, V> entry) { 194 return getMap().put(entry.getKey(), entry.getValue()); 195 } 196 } 197
