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/*
* Copyright (C) 2007 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.collect;
import static java.util.Arrays.asList;
import com.google.common.base.Function;
import com.google.common.collect.testing.MinimalSet;
import com.google.common.collect.testing.SetTestSuiteBuilder;
import com.google.common.collect.testing.TestStringSetGenerator;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.testing.EqualsTester;
import com.google.common.testing.ForwardingWrapperTester;
import java.util.Collection;
import java.util.Set;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
/**
* Tests for {@code ForwardingSet}.
*
* @author Robert Konigsberg
* @author Louis Wasserman
*/
public class ForwardingSetTest extends TestCase {
static class StandardImplForwardingSet<T> extends ForwardingSet<T> {
private final Set<T> backingSet;
StandardImplForwardingSet(Set<T> backingSet) {
this.backingSet = backingSet;
}
@Override
protected Set<T> delegate() {
return backingSet;
}
@Override
public boolean equals(Object object) {
return standardEquals(object);
}
@Override
public int hashCode() {
return standardHashCode();
}
@Override
public boolean addAll(Collection<? extends T> collection) {
return standardAddAll(collection);
}
@Override
public void clear() {
standardClear();
}
@Override
public boolean contains(Object object) {
return standardContains(object);
}
@Override
public boolean containsAll(Collection<?> collection) {
return standardContainsAll(collection);
}
@Override
public boolean remove(Object object) {
return standardRemove(object);
}
@Override
public boolean removeAll(Collection<?> collection) {
return standardRemoveAll(collection);
}
@Override
public boolean retainAll(Collection<?> collection) {
return standardRetainAll(collection);
}
@Override
public Object[] toArray() {
return standardToArray();
}
@Override
public <T> T[] toArray(T[] array) {
return standardToArray(array);
}
@Override
public String toString() {
return standardToString();
}
}
public static Test suite() {
TestSuite suite = new TestSuite();
suite.addTestSuite(ForwardingSetTest.class);
suite.addTest(
SetTestSuiteBuilder.using(
new TestStringSetGenerator() {
@Override
protected Set<String> create(String[] elements) {
return new StandardImplForwardingSet<>(Sets.newLinkedHashSet(asList(elements)));
}
})
.named("ForwardingSet[LinkedHashSet] with standard implementations")
.withFeatures(
CollectionSize.ANY,
CollectionFeature.ALLOWS_NULL_VALUES,
CollectionFeature.GENERAL_PURPOSE)
.createTestSuite());
suite.addTest(
SetTestSuiteBuilder.using(
new TestStringSetGenerator() {
@Override
protected Set<String> create(String[] elements) {
return new StandardImplForwardingSet<>(MinimalSet.of(elements));
}
})
.named("ForwardingSet[MinimalSet] with standard implementations")
.withFeatures(CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_VALUES)
.createTestSuite());
return suite;
}
@SuppressWarnings({"rawtypes", "unchecked"})
public void testForwarding() {
new ForwardingWrapperTester()
.testForwarding(
Set.class,
new Function<Set, Set>() {
@Override
public Set apply(Set delegate) {
return wrap(delegate);
}
});
}
public void testEquals() {
Set<String> set1 = ImmutableSet.of("one");
Set<String> set2 = ImmutableSet.of("two");
new EqualsTester()
.addEqualityGroup(set1, wrap(set1), wrap(set1))
.addEqualityGroup(set2, wrap(set2))
.testEquals();
}
private static <T> Set<T> wrap(final Set<T> delegate) {
return new ForwardingSet<T>() {
@Override
protected Set<T> delegate() {
return delegate;
}
};
}
}
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