140 lines
4.8 KiB
Java
140 lines
4.8 KiB
Java
/*
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* Copyright (C) 2007 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.collect;
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import com.google.common.collect.ImmutableClassToInstanceMapTest.Impl;
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import com.google.common.collect.ImmutableClassToInstanceMapTest.TestClassToInstanceMapGenerator;
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import com.google.common.collect.testing.MapTestSuiteBuilder;
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import com.google.common.collect.testing.features.CollectionFeature;
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import com.google.common.collect.testing.features.CollectionSize;
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import com.google.common.collect.testing.features.MapFeature;
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import java.util.Map;
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import java.util.Map.Entry;
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import junit.framework.Test;
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import junit.framework.TestCase;
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import junit.framework.TestSuite;
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/**
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* Unit test of {@link MutableClassToInstanceMap}.
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*
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* @author Kevin Bourrillion
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*/
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public class MutableClassToInstanceMapTest extends TestCase {
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public static Test suite() {
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TestSuite suite = new TestSuite();
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suite.addTestSuite(MutableClassToInstanceMapTest.class);
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suite.addTest(
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MapTestSuiteBuilder.using(
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new TestClassToInstanceMapGenerator() {
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// Other tests will verify what real, warning-free usage looks like
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// but here we have to do some serious fudging
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@Override
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@SuppressWarnings("unchecked")
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public Map<Class, Impl> create(Object... elements) {
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MutableClassToInstanceMap<Impl> map = MutableClassToInstanceMap.create();
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for (Object object : elements) {
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Entry<Class, Impl> entry = (Entry<Class, Impl>) object;
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map.putInstance(entry.getKey(), entry.getValue());
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}
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return (Map) map;
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}
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})
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.named("MutableClassToInstanceMap")
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.withFeatures(
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MapFeature.GENERAL_PURPOSE,
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MapFeature.RESTRICTS_KEYS,
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MapFeature.ALLOWS_NULL_VALUES,
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CollectionSize.ANY,
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CollectionFeature.SERIALIZABLE,
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CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
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MapFeature.ALLOWS_ANY_NULL_QUERIES)
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.createTestSuite());
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return suite;
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}
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private ClassToInstanceMap<Number> map;
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@Override
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protected void setUp() throws Exception {
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map = MutableClassToInstanceMap.create();
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}
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public void testConstraint() {
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/**
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* We'll give ourselves a pass on testing all the possible ways of breaking the constraint,
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* because we know that newClassMap() is implemented using ConstrainedMap which is itself
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* well-tested. A purist would object to this, but what can I say, we're dirty cheaters.
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*/
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map.put(Integer.class, new Integer(5));
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try {
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map.put(Double.class, new Long(42));
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fail();
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} catch (ClassCastException expected) {
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}
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// Won't compile: map.put(String.class, "x");
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}
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public void testPutAndGetInstance() {
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assertNull(map.putInstance(Integer.class, new Integer(5)));
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Integer oldValue = map.putInstance(Integer.class, new Integer(7));
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assertEquals(5, (int) oldValue);
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Integer newValue = map.getInstance(Integer.class);
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assertEquals(7, (int) newValue);
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// Won't compile: map.putInstance(Double.class, new Long(42));
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}
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public void testNull() {
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try {
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map.put(null, new Integer(1));
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fail();
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} catch (NullPointerException expected) {
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}
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map.putInstance(Integer.class, null);
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assertNull(map.get(Integer.class));
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assertNull(map.getInstance(Integer.class));
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map.put(Long.class, null);
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assertNull(map.get(Long.class));
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assertNull(map.getInstance(Long.class));
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}
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public void testPrimitiveAndWrapper() {
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assertNull(map.getInstance(int.class));
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assertNull(map.getInstance(Integer.class));
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assertNull(map.putInstance(int.class, 0));
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assertNull(map.putInstance(Integer.class, 1));
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assertEquals(2, map.size());
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assertEquals(0, (int) map.getInstance(int.class));
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assertEquals(1, (int) map.getInstance(Integer.class));
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assertEquals(0, (int) map.putInstance(int.class, null));
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assertEquals(1, (int) map.putInstance(Integer.class, null));
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assertNull(map.getInstance(int.class));
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assertNull(map.getInstance(Integer.class));
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assertEquals(2, map.size());
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}
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}
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