1 /* 2 * Copyright (C) 2012 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.reflect; 18 19 import static org.truth0.Truth.ASSERT; 20 21 import com.google.common.collect.ImmutableList; 22 import com.google.common.collect.Maps; 23 import com.google.common.collect.testing.MapTestSuiteBuilder; 24 import com.google.common.collect.testing.SampleElements; 25 import com.google.common.collect.testing.TestMapGenerator; 26 import com.google.common.collect.testing.features.CollectionFeature; 27 import com.google.common.collect.testing.features.CollectionSize; 28 import com.google.common.collect.testing.features.MapFeature; 29 30 import junit.framework.Test; 31 import junit.framework.TestCase; 32 import junit.framework.TestSuite; 33 34 import java.util.List; 35 import java.util.Map; 36 import java.util.Map.Entry; 37 38 /** 39 * Unit test for {@link ImmutableTypeToInstanceMap}. 40 * 41 * @author Ben Yu 42 */ 43 public class ImmutableTypeToInstanceMapTest extends TestCase { 44 45 public static Test suite() { 46 TestSuite suite = new TestSuite(); 47 suite.addTestSuite(ImmutableTypeToInstanceMapTest.class); 48 49 suite.addTest(MapTestSuiteBuilder 50 .using(new TestTypeToInstanceMapGenerator() { 51 // Other tests will verify what real, warning-free usage looks like 52 // but here we have to do some serious fudging 53 @Override 54 @SuppressWarnings("unchecked") 55 public Map<TypeToken, Object> create(Object... elements) { 56 ImmutableTypeToInstanceMap.Builder<Object> builder 57 = ImmutableTypeToInstanceMap.builder(); 58 for (Object object : elements) { 59 Entry<TypeToken, Object> entry = (Entry<TypeToken, Object>) object; 60 builder.put(entry.getKey(), entry.getValue()); 61 } 62 return (Map) builder.build(); 63 } 64 }) 65 .named("ImmutableTypeToInstanceMap") 66 .withFeatures( 67 MapFeature.REJECTS_DUPLICATES_AT_CREATION, 68 MapFeature.RESTRICTS_KEYS, 69 CollectionFeature.KNOWN_ORDER, 70 CollectionSize.ANY, 71 MapFeature.ALLOWS_ANY_NULL_QUERIES) 72 .createTestSuite()); 73 74 return suite; 75 } 76 77 public void testEmpty() { 78 assertEquals(0, ImmutableTypeToInstanceMap.of().size()); 79 } 80 81 public void testPrimitiveAndWrapper() { 82 ImmutableTypeToInstanceMap<Number> map = ImmutableTypeToInstanceMap.<Number>builder() 83 .put(Integer.class, 0) 84 .put(int.class, 1) 85 .build(); 86 assertEquals(2, map.size()); 87 88 assertEquals(0, (int) map.getInstance(Integer.class)); 89 assertEquals(0, (int) map.getInstance(TypeToken.of(Integer.class))); 90 assertEquals(1, (int) map.getInstance(int.class)); 91 assertEquals(1, (int) map.getInstance(TypeToken.of(int.class))); 92 } 93 94 public void testParameterizedType() { 95 TypeToken<ImmutableList<Integer>> type = new TypeToken<ImmutableList<Integer>>() {}; 96 ImmutableTypeToInstanceMap<Iterable<?>> map = ImmutableTypeToInstanceMap.<Iterable<?>>builder() 97 .put(type, ImmutableList.of(1)) 98 .build(); 99 assertEquals(1, map.size()); 100 assertEquals(ImmutableList.of(1), map.getInstance(type)); 101 } 102 103 public void testGeneriArrayType() { 104 @SuppressWarnings("unchecked") // Trying to test generic array 105 ImmutableList<Integer>[] array = new ImmutableList[] {ImmutableList.of(1)}; 106 TypeToken<ImmutableList<Integer>[]> type = new TypeToken<ImmutableList<Integer>[]>() {}; 107 ImmutableTypeToInstanceMap<Iterable<?>[]> map = 108 ImmutableTypeToInstanceMap.<Iterable<?>[]>builder() 109 .put(type, array) 110 .build(); 111 assertEquals(1, map.size()); 112 ASSERT.that(map.getInstance(type)).has().exactly(array[0]).inOrder(); 113 } 114 115 public void testWildcardType() { 116 TypeToken<ImmutableList<?>> type = new TypeToken<ImmutableList<?>>() {}; 117 ImmutableTypeToInstanceMap<Iterable<?>> map = ImmutableTypeToInstanceMap.<Iterable<?>>builder() 118 .put(type, ImmutableList.of(1)) 119 .build(); 120 assertEquals(1, map.size()); 121 assertEquals(ImmutableList.of(1), map.getInstance(type)); 122 } 123 124 public void testGetInstance_containsTypeVariable() { 125 ImmutableTypeToInstanceMap<Iterable<Number>> map = ImmutableTypeToInstanceMap.of(); 126 try { 127 map.getInstance(this.<Number>anyIterableType()); 128 fail(); 129 } catch (IllegalArgumentException expected) {} 130 } 131 132 public void testPut_containsTypeVariable() { 133 ImmutableTypeToInstanceMap.Builder<Iterable<Integer>> builder = 134 ImmutableTypeToInstanceMap.builder(); 135 try { 136 builder.put(this.<Integer>anyIterableType(), ImmutableList.of(1)); 137 fail(); 138 } catch (IllegalArgumentException expected) {} 139 } 140 141 private <T> TypeToken<Iterable<T>> anyIterableType() { 142 return new TypeToken<Iterable<T>>() {}; 143 } 144 145 abstract static class TestTypeToInstanceMapGenerator 146 implements TestMapGenerator<TypeToken, Object> { 147 148 @Override public TypeToken[] createKeyArray(int length) { 149 return new TypeToken[length]; 150 } 151 152 @Override public Object[] createValueArray(int length) { 153 return new Object[length]; 154 } 155 156 @Override 157 public SampleElements<Entry<TypeToken, Object>> samples() { 158 Entry<TypeToken, Object> entry1 = 159 Maps.immutableEntry((TypeToken) TypeToken.of(Integer.class), (Object) 0); 160 Entry<TypeToken, Object> entry2 = 161 Maps.immutableEntry((TypeToken) TypeToken.of(Number.class), (Object) 1); 162 Entry<TypeToken, Object> entry3 = 163 Maps.immutableEntry((TypeToken) new TypeToken<ImmutableList<Integer>>() {}, 164 (Object) ImmutableList.of(2)); 165 Entry<TypeToken, Object> entry4 = 166 Maps.immutableEntry((TypeToken) new TypeToken<int[]>() {}, (Object) new int[] {3}); 167 Entry<TypeToken, Object> entry5 = 168 Maps.immutableEntry((TypeToken) new TypeToken<Iterable<?>>() {}, 169 (Object) ImmutableList.of("4")); 170 return new SampleElements<Entry<TypeToken, Object>>( 171 entry1, entry2, entry3, entry4, entry5 172 ); 173 } 174 175 @Override 176 @SuppressWarnings("unchecked") 177 public Entry<TypeToken, Object>[] createArray(int length) { 178 return new Entry[length]; 179 } 180 181 @Override 182 public Iterable<Entry<TypeToken, Object>> order(List<Entry<TypeToken, Object>> insertionOrder) { 183 return insertionOrder; 184 } 185 } 186 } 187