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/*
* Copyright (C) 2012 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.reflect;
import static org.truth0.Truth.ASSERT;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.google.common.collect.testing.MapTestSuiteBuilder;
import com.google.common.collect.testing.SampleElements;
import com.google.common.collect.testing.TestMapGenerator;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
/**
* Unit test for {@link ImmutableTypeToInstanceMap}.
*
* @author Ben Yu
*/
public class ImmutableTypeToInstanceMapTest extends TestCase {
public static Test suite() {
TestSuite suite = new TestSuite();
suite.addTestSuite(ImmutableTypeToInstanceMapTest.class);
suite.addTest(MapTestSuiteBuilder
.using(new TestTypeToInstanceMapGenerator() {
// Other tests will verify what real, warning-free usage looks like
// but here we have to do some serious fudging
@Override
@SuppressWarnings("unchecked")
public Map<TypeToken, Object> create(Object... elements) {
ImmutableTypeToInstanceMap.Builder<Object> builder
= ImmutableTypeToInstanceMap.builder();
for (Object object : elements) {
Entry<TypeToken, Object> entry = (Entry<TypeToken, Object>) object;
builder.put(entry.getKey(), entry.getValue());
}
return (Map) builder.build();
}
})
.named("ImmutableTypeToInstanceMap")
.withFeatures(
MapFeature.REJECTS_DUPLICATES_AT_CREATION,
MapFeature.RESTRICTS_KEYS,
CollectionFeature.KNOWN_ORDER,
CollectionSize.ANY,
MapFeature.ALLOWS_NULL_QUERIES)
.createTestSuite());
return suite;
}
public void testEmpty() {
assertEquals(0, ImmutableTypeToInstanceMap.of().size());
}
public void testPrimitiveAndWrapper() {
ImmutableTypeToInstanceMap<Number> map = ImmutableTypeToInstanceMap.<Number>builder()
.put(Integer.class, 0)
.put(int.class, 1)
.build();
assertEquals(2, map.size());
assertEquals(0, (int) map.getInstance(Integer.class));
assertEquals(0, (int) map.getInstance(TypeToken.of(Integer.class)));
assertEquals(1, (int) map.getInstance(int.class));
assertEquals(1, (int) map.getInstance(TypeToken.of(int.class)));
}
public void testParameterizedType() {
TypeToken<ImmutableList<Integer>> type = new TypeToken<ImmutableList<Integer>>() {};
ImmutableTypeToInstanceMap<Iterable<?>> map = ImmutableTypeToInstanceMap.<Iterable<?>>builder()
.put(type, ImmutableList.of(1))
.build();
assertEquals(1, map.size());
assertEquals(ImmutableList.of(1), map.getInstance(type));
}
public void testGeneriArrayType() {
@SuppressWarnings("unchecked") // Trying to test generic array
ImmutableList<Integer>[] array = new ImmutableList[] {ImmutableList.of(1)};
TypeToken<ImmutableList<Integer>[]> type = new TypeToken<ImmutableList<Integer>[]>() {};
ImmutableTypeToInstanceMap<Iterable<?>[]> map =
ImmutableTypeToInstanceMap.<Iterable<?>[]>builder()
.put(type, array)
.build();
assertEquals(1, map.size());
ASSERT.that(map.getInstance(type)).has().allOf(array[0]).inOrder();
}
public void testWildcardType() {
TypeToken<ImmutableList<?>> type = new TypeToken<ImmutableList<?>>() {};
ImmutableTypeToInstanceMap<Iterable<?>> map = ImmutableTypeToInstanceMap.<Iterable<?>>builder()
.put(type, ImmutableList.of(1))
.build();
assertEquals(1, map.size());
assertEquals(ImmutableList.of(1), map.getInstance(type));
}
public void testGetInstance_containsTypeVariable() {
ImmutableTypeToInstanceMap<Iterable<Number>> map = ImmutableTypeToInstanceMap.of();
try {
map.getInstance(this.<Number>anyIterableType());
fail();
} catch (IllegalArgumentException expected) {}
}
public void testPut_containsTypeVariable() {
ImmutableTypeToInstanceMap.Builder<Iterable<Integer>> builder =
ImmutableTypeToInstanceMap.builder();
try {
builder.put(this.<Integer>anyIterableType(), ImmutableList.of(1));
fail();
} catch (IllegalArgumentException expected) {}
}
private <T> TypeToken<Iterable<T>> anyIterableType() {
return new TypeToken<Iterable<T>>() {};
}
abstract static class TestTypeToInstanceMapGenerator
implements TestMapGenerator<TypeToken, Object> {
@Override public TypeToken[] createKeyArray(int length) {
return new TypeToken[length];
}
@Override public Object[] createValueArray(int length) {
return new Object[length];
}
@Override
public SampleElements<Entry<TypeToken, Object>> samples() {
Entry<TypeToken, Object> entry1 =
Maps.immutableEntry((TypeToken) TypeToken.of(Integer.class), (Object) 0);
Entry<TypeToken, Object> entry2 =
Maps.immutableEntry((TypeToken) TypeToken.of(Number.class), (Object) 1);
Entry<TypeToken, Object> entry3 =
Maps.immutableEntry((TypeToken) new TypeToken<ImmutableList<Integer>>() {},
(Object) ImmutableList.of(2));
Entry<TypeToken, Object> entry4 =
Maps.immutableEntry((TypeToken) new TypeToken<int[]>() {}, (Object) new int[] {3});
Entry<TypeToken, Object> entry5 =
Maps.immutableEntry((TypeToken) new TypeToken<Iterable<?>>() {},
(Object) ImmutableList.of("4"));
return new SampleElements<Entry<TypeToken, Object>>(
entry1, entry2, entry3, entry4, entry5
);
}
@Override
@SuppressWarnings("unchecked")
public Entry<TypeToken, Object>[] createArray(int length) {
return new Entry[length];
}
@Override
public Iterable<Entry<TypeToken, Object>> order(List<Entry<TypeToken, Object>> insertionOrder) {
return insertionOrder;
}
}
}
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