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; 18 19 import com.google.common.collect.ImmutableClassToInstanceMapTest.TestClassToInstanceMapGenerator; 20 import com.google.common.collect.testing.MapTestSuiteBuilder; 21 import com.google.common.collect.testing.features.CollectionFeature; 22 import com.google.common.collect.testing.features.CollectionSize; 23 import com.google.common.collect.testing.features.MapFeature; 24 import com.google.common.collect.testing.testers.MapPutTester; 25 26 import junit.framework.Test; 27 import junit.framework.TestCase; 28 import junit.framework.TestSuite; 29 30 import java.lang.reflect.Method; 31 import java.util.Map; 32 import java.util.Map.Entry; 33 34 /** 35 * Unit test of {@link MutableClassToInstanceMap}. 36 * 37 * @author Kevin Bourrillion 38 */ 39 public class MutableClassToInstanceMapTest extends TestCase { suite()40 public static Test suite() { 41 TestSuite suite = new TestSuite(); 42 suite.addTestSuite(MutableClassToInstanceMapTest.class); 43 44 // Suppress this one because the tester framework doesn't understand that 45 // *some* remappings will be allowed and others not. 46 Method remapTest = null; 47 try { 48 remapTest = MapPutTester.class.getMethod( 49 "testPut_replaceNullValueWithNonNullSupported"); 50 } catch (NoSuchMethodException e) { 51 throw new AssertionError(); 52 } 53 54 suite.addTest(MapTestSuiteBuilder 55 .using(new TestClassToInstanceMapGenerator() { 56 // Other tests will verify what real, warning-free usage looks like 57 // but here we have to do some serious fudging 58 @Override 59 @SuppressWarnings("unchecked") 60 public Map<Class, Number> create(Object... elements) { 61 MutableClassToInstanceMap<Number> map 62 = MutableClassToInstanceMap.create(); 63 for (Object object : elements) { 64 Entry<Class, Number> entry = (Entry<Class, Number>) object; 65 map.putInstance(entry.getKey(), entry.getValue()); 66 } 67 return (Map) map; 68 } 69 }) 70 .named("MutableClassToInstanceMap") 71 .withFeatures( 72 MapFeature.GENERAL_PURPOSE, 73 MapFeature.RESTRICTS_KEYS, 74 MapFeature.ALLOWS_NULL_VALUES, 75 CollectionSize.ANY, 76 CollectionFeature.SUPPORTS_ITERATOR_REMOVE, 77 MapFeature.ALLOWS_ANY_NULL_QUERIES) 78 .suppressing(remapTest) 79 .createTestSuite()); 80 81 return suite; 82 } 83 84 private ClassToInstanceMap<Number> map; 85 setUp()86 @Override protected void setUp() throws Exception { 87 map = MutableClassToInstanceMap.create(); 88 } 89 testConstraint()90 public void testConstraint() { 91 92 /** 93 * We'll give ourselves a pass on testing all the possible ways of 94 * breaking the constraint, because we know that newClassMap() is 95 * implemented using ConstrainedMap which is itself well-tested. 96 * A purist would object to this, but what can I say, we're dirty 97 * cheaters. 98 */ 99 100 map.put(Integer.class, new Integer(5)); 101 try { 102 map.put(Double.class, new Long(42)); 103 fail(); 104 } catch (ClassCastException expected) { 105 } 106 // Won't compile: map.put(String.class, "x"); 107 } 108 testPutAndGetInstance()109 public void testPutAndGetInstance() { 110 assertNull(map.putInstance(Integer.class, new Integer(5))); 111 112 Integer oldValue = map.putInstance(Integer.class, new Integer(7)); 113 assertEquals(5, (int) oldValue); 114 115 Integer newValue = map.getInstance(Integer.class); 116 assertEquals(7, (int) newValue); 117 118 // Won't compile: map.putInstance(Double.class, new Long(42)); 119 } 120 testNull()121 public void testNull() { 122 try { 123 map.put(null, new Integer(1)); 124 fail(); 125 } catch (NullPointerException expected) { 126 } 127 map.putInstance(Integer.class, null); 128 assertNull(map.get(Integer.class)); 129 assertNull(map.getInstance(Integer.class)); 130 131 map.put(Long.class, null); 132 assertNull(map.get(Long.class)); 133 assertNull(map.getInstance(Long.class)); 134 } 135 testPrimitiveAndWrapper()136 public void testPrimitiveAndWrapper() { 137 assertNull(map.getInstance(int.class)); 138 assertNull(map.getInstance(Integer.class)); 139 140 assertNull(map.putInstance(int.class, 0)); 141 assertNull(map.putInstance(Integer.class, 1)); 142 assertEquals(2, map.size()); 143 144 assertEquals(0, (int) map.getInstance(int.class)); 145 assertEquals(1, (int) map.getInstance(Integer.class)); 146 147 assertEquals(0, (int) map.putInstance(int.class, null)); 148 assertEquals(1, (int) map.putInstance(Integer.class, null)); 149 150 assertNull(map.getInstance(int.class)); 151 assertNull(map.getInstance(Integer.class)); 152 assertEquals(2, map.size()); 153 } 154 } 155