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.CollectionFeature.ALLOWS_NULL_QUERIES; 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 23 import com.google.common.collect.testing.AbstractMapTester; 24 import com.google.common.collect.testing.WrongType; 25 import com.google.common.collect.testing.features.CollectionFeature; 26 import com.google.common.collect.testing.features.CollectionSize; 27 import com.google.common.collect.testing.features.MapFeature; 28 29 /** 30 * A generic JUnit test which tests {@code get} operations on a map. Can't be 31 * invoked directly; please see 32 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 33 * 34 * <p>This class is GWT compatible. 35 * 36 * @author Kevin Bourrillion 37 * @author Chris Povirk 38 */ 39 public class MapGetTester<K, V> extends AbstractMapTester<K, V> { 40 @CollectionSize.Require(absent = ZERO) 41 public void testGet_yes() { 42 assertEquals("get(present) should return the associated value", 43 samples.e0.getValue(), get(samples.e0.getKey())); 44 } 45 46 public void testGet_no() { 47 assertNull("get(notPresent) should return null", get(samples.e3.getKey())); 48 } 49 50 @CollectionFeature.Require(ALLOWS_NULL_QUERIES) 51 public void testGet_nullNotContainedButAllowed() { 52 assertNull("get(null) should return null", get(null)); 53 } 54 55 @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES) 56 public void testGet_nullNotContainedAndUnsupported() { 57 try { 58 assertNull("get(null) should return null or throw", get(null)); 59 } catch (NullPointerException tolerated) { 60 } 61 } 62 63 @MapFeature.Require(ALLOWS_NULL_KEYS) 64 @CollectionSize.Require(absent = ZERO) 65 public void testGet_nonNullWhenNullContained() { 66 initMapWithNullKey(); 67 assertNull("get(notPresent) should return null", get(samples.e3.getKey())); 68 } 69 70 @MapFeature.Require(ALLOWS_NULL_KEYS) 71 @CollectionSize.Require(absent = ZERO) 72 public void testGet_nullContained() { 73 initMapWithNullKey(); 74 assertEquals("get(null) should return the associated value", 75 getValueForNullKey(), get(null)); 76 } 77 78 public void testGet_wrongType() { 79 try { 80 assertNull("get(wrongType) should return null or throw", 81 getMap().get(WrongType.VALUE)); 82 } catch (ClassCastException tolerated) { 83 } 84 } 85 } 86
