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_KEY_QUERIES; 22 23 import com.google.common.annotations.GwtCompatible; 24 import com.google.common.collect.testing.AbstractMapTester; 25 import com.google.common.collect.testing.WrongType; 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 * @author Kevin Bourrillion 35 * @author Chris Povirk 36 */ 37 @GwtCompatible 38 public class MapGetTester<K, V> extends AbstractMapTester<K, V> { 39 @CollectionSize.Require(absent = ZERO) testGet_yes()40 public void testGet_yes() { 41 assertEquals("get(present) should return the associated value", 42 samples.e0.getValue(), get(samples.e0.getKey())); 43 } 44 testGet_no()45 public void testGet_no() { 46 assertNull("get(notPresent) should return null", get(samples.e3.getKey())); 47 } 48 49 @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES) testGet_nullNotContainedButAllowed()50 public void testGet_nullNotContainedButAllowed() { 51 assertNull("get(null) should return null", get(null)); 52 } 53 54 @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES) testGet_nullNotContainedAndUnsupported()55 public void testGet_nullNotContainedAndUnsupported() { 56 try { 57 assertNull("get(null) should return null or throw", get(null)); 58 } catch (NullPointerException tolerated) { 59 } 60 } 61 62 @MapFeature.Require(ALLOWS_NULL_KEYS) 63 @CollectionSize.Require(absent = ZERO) testGet_nonNullWhenNullContained()64 public void testGet_nonNullWhenNullContained() { 65 initMapWithNullKey(); 66 assertNull("get(notPresent) should return null", get(samples.e3.getKey())); 67 } 68 69 @MapFeature.Require(ALLOWS_NULL_KEYS) 70 @CollectionSize.Require(absent = ZERO) testGet_nullContained()71 public void testGet_nullContained() { 72 initMapWithNullKey(); 73 assertEquals("get(null) should return the associated value", 74 getValueForNullKey(), get(null)); 75 } 76 testGet_wrongType()77 public void testGet_wrongType() { 78 try { 79 assertNull("get(wrongType) should return null or throw", 80 getMap().get(WrongType.VALUE)); 81 } catch (ClassCastException tolerated) { 82 } 83 } 84 } 85