/*
* Copyright (C) 2009 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 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.collect.testing.google.MultisetTestSuiteBuilder;
import com.google.common.collect.testing.google.TestStringMultisetGenerator;
import junit.framework.Test;
import junit.framework.TestSuite;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.Set;
/**
* Tests for {@link ForwardingMultiset}.
*
* @author Hayward Chan
* @author Louis Wasserman
*/
public class ForwardingMultisetTest extends ForwardingTestCase {
static final class StandardImplForwardingMultiset<T>
extends ForwardingMultiset<T> {
private final Multiset<T> backingCollection;
StandardImplForwardingMultiset(Multiset<T> backingMultiset) {
this.backingCollection = backingMultiset;
}
@Override protected Multiset<T> delegate() {
return backingCollection;
}
@Override public boolean addAll(Collection<? extends T> collection) {
return standardAddAll(collection);
}
@Override public boolean add(T element) {
return standardAdd(element);
}
@Override public void clear() {
standardClear();
}
@Override public int count(Object element) {
return standardCount(element);
}
@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();
}
@Override public boolean equals(Object object) {
return standardEquals(object);
}
@Override public int hashCode() {
return standardHashCode();
}
@Override public boolean setCount(T element, int oldCount, int newCount) {
return standardSetCount(element, oldCount, newCount);
}
@Override public int setCount(T element, int count) {
return standardSetCount(element, count);
}
@Override public Set<T> elementSet() {
return new StandardElementSet();
}
@Override public Iterator<T> iterator() {
return standardIterator();
}
@Override public boolean isEmpty() {
return standardIsEmpty();
}
@Override public int size() {
return standardSize();
}
}
private static final Collection<String> EMPTY_COLLECTION =
Collections.emptyList();
protected Multiset<String> forward;
public static Test suite() {
TestSuite suite = new TestSuite();
suite.addTestSuite(ForwardingMultisetTest.class);
suite.addTest(
MultisetTestSuiteBuilder.using(new TestStringMultisetGenerator() {
@Override protected Multiset<String> create(String[] elements) {
return new StandardImplForwardingMultiset<String>(
LinkedHashMultiset.create(Arrays.asList(elements)));
}
}).named("ForwardingMultiset[LinkedHashMultiset] with standard "
+ "implementations").withFeatures(CollectionSize.ANY,
CollectionFeature.ALLOWS_NULL_VALUES,
CollectionFeature.GENERAL_PURPOSE).createTestSuite());
suite.addTest(
MultisetTestSuiteBuilder.using(new TestStringMultisetGenerator() {
@Override protected Multiset<String> create(String[] elements) {
return new StandardImplForwardingMultiset<String>(
ImmutableMultiset.copyOf(elements));
}
}).named("ForwardingMultiset[ImmutableMultiset] with standard "
+ "implementations")
.withFeatures(CollectionSize.ANY,
CollectionFeature.ALLOWS_NULL_QUERIES)
.createTestSuite());
suite.addTest(SetTestSuiteBuilder.using(new TestStringSetGenerator() {
/**
* Returns a Multiset that throws an exception on any attempt to use a
* method not specifically authorized by the elementSet() or hashCode()
* docs.
*/
@Override protected Set<String> create(String[] elements) {
final Multiset<String> inner =
LinkedHashMultiset.create(Arrays.asList(elements));
return new ForwardingMultiset<String>() {
@Override protected Multiset<String> delegate() {
return inner;
}
@Override public Set<String> elementSet() {
return new StandardElementSet();
}
@Override public int add(String element, int occurrences) {
throw new UnsupportedOperationException();
}
@Override public Set<Entry<String>> entrySet() {
final Set<Entry<String>> backingSet = super.entrySet();
return new ForwardingSet<Entry<String>>() {
@Override protected Set<Entry<String>> delegate() {
return backingSet;
}
@Override public boolean add(Entry<String> element) {
throw new UnsupportedOperationException();
}
@Override public boolean addAll(
Collection<? extends Entry<String>> collection) {
throw new UnsupportedOperationException();
}
@Override public void clear() {
throw new UnsupportedOperationException();
}
@Override public boolean contains(Object object) {
throw new UnsupportedOperationException();
}
@Override public boolean containsAll(Collection<?> collection) {
throw new UnsupportedOperationException();
}
@Override public boolean isEmpty() {
throw new UnsupportedOperationException();
}
@Override public boolean remove(Object object) {
throw new UnsupportedOperationException();
}
@Override public boolean removeAll(Collection<?> collection) {
throw new UnsupportedOperationException();
}
@Override public boolean retainAll(Collection<?> collection) {
throw new UnsupportedOperationException();
}
};
}
@Override public boolean equals(Object object) {
throw new UnsupportedOperationException();
}
@Override public boolean remove(Object element) {
throw new UnsupportedOperationException();
}
@Override public boolean setCount(
String element, int oldCount, int newCount) {
throw new UnsupportedOperationException();
}
@Override public int setCount(String element, int count) {
throw new UnsupportedOperationException();
}
@Override public boolean add(String element) {
throw new UnsupportedOperationException();
}
@Override public boolean addAll(
Collection<? extends String> collection) {
throw new UnsupportedOperationException();
}
@Override public Iterator<String> iterator() {
throw new UnsupportedOperationException();
}
@Override public boolean removeAll(Collection<?> collection) {
throw new UnsupportedOperationException();
}
@Override public boolean retainAll(Collection<?> collection) {
throw new UnsupportedOperationException();
}
@Override public int size() {
throw new UnsupportedOperationException();
}
}.elementSet();
}
}).named("standardElementSet tripwire").withFeatures(CollectionSize.ANY,
CollectionFeature.ALLOWS_NULL_VALUES,
CollectionFeature.REMOVE_OPERATIONS).createTestSuite());
return suite;
}
@Override public void setUp() throws Exception {
super.setUp();
/*
* Class parameters must be raw, so we can't create a proxy with generic
* type arguments. The created proxy only records calls and returns null, so
* the type is irrelevant at runtime.
*/
@SuppressWarnings("unchecked")
final Multiset<String> multiset = createProxyInstance(Multiset.class);
forward = new ForwardingMultiset<String>() {
@Override protected Multiset<String> delegate() {
return multiset;
}
};
}
public void testAdd_T() {
forward().add("asdf");
assertEquals("[add(Object)]", getCalls());
}
public void testAddAll_Collection() {
forward().addAll(EMPTY_COLLECTION);
assertEquals("[addAll(Collection)]", getCalls());
}
public void testClear() {
forward().clear();
assertEquals("[clear]", getCalls());
}
public void testContains_Object() {
forward().contains(null);
assertEquals("[contains(Object)]", getCalls());
}
public void testContainsAll_Collection() {
forward().containsAll(EMPTY_COLLECTION);
assertEquals("[containsAll(Collection)]", getCalls());
}
public void testIsEmpty() {
forward().isEmpty();
assertEquals("[isEmpty]", getCalls());
}
public void testIterator() {
forward().iterator();
assertEquals("[iterator]", getCalls());
}
public void testRemove_Object() {
forward().remove(null);
assertEquals("[remove(Object)]", getCalls());
}
public void testRemoveAll_Collection() {
forward().removeAll(EMPTY_COLLECTION);
assertEquals("[removeAll(Collection)]", getCalls());
}
public void testRetainAll_Collection() {
forward().retainAll(EMPTY_COLLECTION);
assertEquals("[retainAll(Collection)]", getCalls());
}
public void testSize() {
forward().size();
assertEquals("[size]", getCalls());
}
public void testToArray() {
forward().toArray();
assertEquals("[toArray]", getCalls());
}
public void testToArray_TArray() {
forward().toArray(new String[0]);
assertEquals("[toArray(Object[])]", getCalls());
}
public void testToString() {
forward().toString();
assertEquals("[toString]", getCalls());
}
public void testEquals_Object() {
forward().equals("asdf");
assertEquals("[equals(Object)]", getCalls());
}
public void testHashCode() {
forward().hashCode();
assertEquals("[hashCode]", getCalls());
}
public void testCount_Object() {
forward().count(null);
assertEquals("[count(Object)]", getCalls());
}
public void testAdd_Object_int() {
forward().add("asd", 23);
assertEquals("[add(Object,int)]", getCalls());
}
public void testRemove_Object_int() {
forward().remove("asd", 23);
assertEquals("[remove(Object,int)]", getCalls());
}
public void testSetCount_Object_int() {
forward().setCount("asdf", 233);
assertEquals("[setCount(Object,int)]", getCalls());
}
public void testSetCount_Object_oldCount_newCount() {
forward().setCount("asdf", 4552, 1233);
assertEquals("[setCount(Object,int,int)]", getCalls());
}
public void testElementSet() {
forward().elementSet();
assertEquals("[elementSet]", getCalls());
}
public void testEntrySet() {
forward().entrySet();
assertEquals("[entrySet]", getCalls());
}
protected Multiset<String> forward() {
return forward;
}
}