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Guava testlib is a set of java classes used for more convenient
unit testing - particularly to assist the tests for Guava itself.
/*
* 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.collect.testing.google;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.testing.Helpers.mapEntry;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMultimap;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multiset;
import com.google.common.collect.testing.AbstractTester;
import com.google.common.collect.testing.CollectionTestSuiteBuilder;
import com.google.common.collect.testing.DerivedGenerator;
import com.google.common.collect.testing.FeatureSpecificTestSuiteBuilder;
import com.google.common.collect.testing.Helpers;
import com.google.common.collect.testing.MapTestSuiteBuilder;
import com.google.common.collect.testing.OneSizeTestContainerGenerator;
import com.google.common.collect.testing.PerCollectionSizeTestSuiteBuilder;
import com.google.common.collect.testing.SampleElements;
import com.google.common.collect.testing.TestCollectionGenerator;
import com.google.common.collect.testing.TestMapGenerator;
import com.google.common.collect.testing.TestSubjectGenerator;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.Feature;
import com.google.common.collect.testing.features.ListFeature;
import com.google.common.collect.testing.features.MapFeature;
import com.google.common.testing.SerializableTester;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import junit.framework.TestSuite;
/**
* Creates, based on your criteria, a JUnit test suite that exhaustively tests a {@code Multimap}
* implementation.
*
* @author Louis Wasserman
*/
@GwtIncompatible
public class MultimapTestSuiteBuilder>
extends PerCollectionSizeTestSuiteBuilder<
MultimapTestSuiteBuilder, TestMultimapGenerator, M, Entry> {
public static > MultimapTestSuiteBuilder using(
TestMultimapGenerator generator) {
return new MultimapTestSuiteBuilder().usingGenerator(generator);
}
// Class parameters must be raw.
@SuppressWarnings("rawtypes") // class literals
@Override
protected List> getTesters() {
return ImmutableList.>of(
MultimapAsMapGetTester.class,
MultimapAsMapTester.class,
MultimapSizeTester.class,
MultimapClearTester.class,
MultimapContainsKeyTester.class,
MultimapContainsValueTester.class,
MultimapContainsEntryTester.class,
MultimapEntriesTester.class,
MultimapEqualsTester.class,
MultimapForEachTester.class,
MultimapGetTester.class,
MultimapKeySetTester.class,
MultimapKeysTester.class,
MultimapPutTester.class,
MultimapPutAllMultimapTester.class,
MultimapPutIterableTester.class,
MultimapReplaceValuesTester.class,
MultimapRemoveEntryTester.class,
MultimapRemoveAllTester.class,
MultimapToStringTester.class,
MultimapValuesTester.class);
}
@Override
protected List createDerivedSuites(
FeatureSpecificTestSuiteBuilder>>
parentBuilder) {
// TODO: Once invariant support is added, supply invariants to each of the
// derived suites, to check that mutations to the derived collections are
// reflected in the underlying map.
List derivedSuites = super.createDerivedSuites(parentBuilder);
if (parentBuilder.getFeatures().contains(CollectionFeature.SERIALIZABLE)) {
derivedSuites.add(
MultimapTestSuiteBuilder.using(
new ReserializedMultimapGenerator(parentBuilder.getSubjectGenerator()))
.withFeatures(computeReserializedMultimapFeatures(parentBuilder.getFeatures()))
.named(parentBuilder.getName() + " reserialized")
.suppressing(parentBuilder.getSuppressedTests())
.withSetUp(parentBuilder.getSetUp())
.withTearDown(parentBuilder.getTearDown())
.createTestSuite());
}
derivedSuites.add(
MapTestSuiteBuilder.using(new AsMapGenerator(parentBuilder.getSubjectGenerator()))
.withFeatures(computeAsMapFeatures(parentBuilder.getFeatures()))
.named(parentBuilder.getName() + ".asMap")
.suppressing(parentBuilder.getSuppressedTests())
.withSetUp(parentBuilder.getSetUp())
.withTearDown(parentBuilder.getTearDown())
.createTestSuite());
derivedSuites.add(computeEntriesTestSuite(parentBuilder));
derivedSuites.add(computeMultimapGetTestSuite(parentBuilder));
derivedSuites.add(computeMultimapAsMapGetTestSuite(parentBuilder));
derivedSuites.add(computeKeysTestSuite(parentBuilder));
derivedSuites.add(computeValuesTestSuite(parentBuilder));
return derivedSuites;
}
TestSuite computeValuesTestSuite(
FeatureSpecificTestSuiteBuilder>>
parentBuilder) {
return CollectionTestSuiteBuilder.using(
new ValuesGenerator(parentBuilder.getSubjectGenerator()))
.withFeatures(computeValuesFeatures(parentBuilder.getFeatures()))
.named(parentBuilder.getName() + ".values")
.suppressing(parentBuilder.getSuppressedTests())
.createTestSuite();
}
TestSuite computeEntriesTestSuite(
FeatureSpecificTestSuiteBuilder>>
parentBuilder) {
return CollectionTestSuiteBuilder.using(
new EntriesGenerator(parentBuilder.getSubjectGenerator()))
.withFeatures(computeEntriesFeatures(parentBuilder.getFeatures()))
.named(parentBuilder.getName() + ".entries")
.suppressing(parentBuilder.getSuppressedTests())
.withSetUp(parentBuilder.getSetUp())
.withTearDown(parentBuilder.getTearDown())
.createTestSuite();
}
TestSuite computeMultimapGetTestSuite(
FeatureSpecificTestSuiteBuilder>>
parentBuilder) {
return CollectionTestSuiteBuilder.using(
new MultimapGetGenerator(parentBuilder.getSubjectGenerator()))
.withFeatures(computeMultimapGetFeatures(parentBuilder.getFeatures()))
.named(parentBuilder.getName() + ".get[key]")
.suppressing(parentBuilder.getSuppressedTests())
.withSetUp(parentBuilder.getSetUp())
.withTearDown(parentBuilder.getTearDown())
.createTestSuite();
}
TestSuite computeMultimapAsMapGetTestSuite(
FeatureSpecificTestSuiteBuilder>>
parentBuilder) {
Set> features = computeMultimapAsMapGetFeatures(parentBuilder.getFeatures());
if (Collections.disjoint(features, EnumSet.allOf(CollectionSize.class))) {
return new TestSuite();
} else {
return CollectionTestSuiteBuilder.using(
new MultimapAsMapGetGenerator(parentBuilder.getSubjectGenerator()))
.withFeatures(features)
.named(parentBuilder.getName() + ".asMap[].get[key]")
.suppressing(parentBuilder.getSuppressedTests())
.withSetUp(parentBuilder.getSetUp())
.withTearDown(parentBuilder.getTearDown())
.createTestSuite();
}
}
TestSuite computeKeysTestSuite(
FeatureSpecificTestSuiteBuilder>>
parentBuilder) {
return MultisetTestSuiteBuilder.using(
new KeysGenerator(parentBuilder.getSubjectGenerator()))
.withFeatures(computeKeysFeatures(parentBuilder.getFeatures()))
.named(parentBuilder.getName() + ".keys")
.suppressing(parentBuilder.getSuppressedTests())
.withSetUp(parentBuilder.getSetUp())
.withTearDown(parentBuilder.getTearDown())
.createTestSuite();
}
static Set> computeDerivedCollectionFeatures(Set> multimapFeatures) {
Set> derivedFeatures = Helpers.copyToSet(multimapFeatures);
if (!derivedFeatures.remove(CollectionFeature.SERIALIZABLE_INCLUDING_VIEWS)) {
derivedFeatures.remove(CollectionFeature.SERIALIZABLE);
}
if (derivedFeatures.remove(MapFeature.SUPPORTS_REMOVE)) {
derivedFeatures.add(CollectionFeature.SUPPORTS_REMOVE);
}
return derivedFeatures;
}
static Set> computeEntriesFeatures(Set> multimapFeatures) {
Set> result = computeDerivedCollectionFeatures(multimapFeatures);
if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_ENTRY_QUERIES)) {
result.add(CollectionFeature.ALLOWS_NULL_QUERIES);
}
return result;
}
static Set> computeValuesFeatures(Set> multimapFeatures) {
Set> result = computeDerivedCollectionFeatures(multimapFeatures);
if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_VALUES)) {
result.add(CollectionFeature.ALLOWS_NULL_VALUES);
}
if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_VALUE_QUERIES)) {
result.add(CollectionFeature.ALLOWS_NULL_QUERIES);
}
return result;
}
static Set> computeKeysFeatures(Set> multimapFeatures) {
Set> result = computeDerivedCollectionFeatures(multimapFeatures);
if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_KEYS)) {
result.add(CollectionFeature.ALLOWS_NULL_VALUES);
}
if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_KEY_QUERIES)) {
result.add(CollectionFeature.ALLOWS_NULL_QUERIES);
}
return result;
}
private static Set> computeReserializedMultimapFeatures(
Set> multimapFeatures) {
Set> derivedFeatures = Helpers.copyToSet(multimapFeatures);
derivedFeatures.remove(CollectionFeature.SERIALIZABLE);
derivedFeatures.remove(CollectionFeature.SERIALIZABLE_INCLUDING_VIEWS);
return derivedFeatures;
}
private static Set> computeAsMapFeatures(Set> multimapFeatures) {
Set> derivedFeatures = Helpers.copyToSet(multimapFeatures);
derivedFeatures.remove(MapFeature.GENERAL_PURPOSE);
derivedFeatures.remove(MapFeature.SUPPORTS_PUT);
derivedFeatures.remove(MapFeature.ALLOWS_NULL_VALUES);
derivedFeatures.add(MapFeature.ALLOWS_NULL_VALUE_QUERIES);
derivedFeatures.add(MapFeature.REJECTS_DUPLICATES_AT_CREATION);
if (!derivedFeatures.contains(CollectionFeature.SERIALIZABLE_INCLUDING_VIEWS)) {
derivedFeatures.remove(CollectionFeature.SERIALIZABLE);
}
return derivedFeatures;
}
private static final ImmutableMultimap, Feature> GET_FEATURE_MAP =
ImmutableMultimap., Feature>builder()
.put(
MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION)
.put(MapFeature.GENERAL_PURPOSE, ListFeature.SUPPORTS_ADD_WITH_INDEX)
.put(MapFeature.GENERAL_PURPOSE, ListFeature.SUPPORTS_REMOVE_WITH_INDEX)
.put(MapFeature.GENERAL_PURPOSE, ListFeature.SUPPORTS_SET)
.put(MapFeature.ALLOWS_NULL_VALUE_QUERIES, CollectionFeature.ALLOWS_NULL_QUERIES)
.put(MapFeature.ALLOWS_NULL_VALUES, CollectionFeature.ALLOWS_NULL_VALUES)
.put(MapFeature.SUPPORTS_REMOVE, CollectionFeature.SUPPORTS_REMOVE)
.put(MapFeature.SUPPORTS_PUT, CollectionFeature.SUPPORTS_ADD)
.build();
Set> computeMultimapGetFeatures(Set> multimapFeatures) {
Set> derivedFeatures = Helpers.copyToSet(multimapFeatures);
for (Entry, Feature> entry : GET_FEATURE_MAP.entries()) {
if (derivedFeatures.contains(entry.getKey())) {
derivedFeatures.add(entry.getValue());
}
}
if (derivedFeatures.remove(MultimapFeature.VALUE_COLLECTIONS_SUPPORT_ITERATOR_REMOVE)) {
derivedFeatures.add(CollectionFeature.SUPPORTS_ITERATOR_REMOVE);
}
if (!derivedFeatures.contains(CollectionFeature.SERIALIZABLE_INCLUDING_VIEWS)) {
derivedFeatures.remove(CollectionFeature.SERIALIZABLE);
}
derivedFeatures.removeAll(GET_FEATURE_MAP.keySet());
return derivedFeatures;
}
Set> computeMultimapAsMapGetFeatures(Set> multimapFeatures) {
Set> derivedFeatures =
Helpers.copyToSet(computeMultimapGetFeatures(multimapFeatures));
if (derivedFeatures.remove(CollectionSize.ANY)) {
derivedFeatures.addAll(CollectionSize.ANY.getImpliedFeatures());
}
derivedFeatures.remove(CollectionSize.ZERO);
return derivedFeatures;
}
private static class AsMapGenerator>
implements TestMapGenerator>, DerivedGenerator {
private final OneSizeTestContainerGenerator> multimapGenerator;
public AsMapGenerator(OneSizeTestContainerGenerator> multimapGenerator) {
this.multimapGenerator = multimapGenerator;
}
@Override
public TestSubjectGenerator getInnerGenerator() {
return multimapGenerator;
}
private Collection createCollection(V v) {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.createCollection(Collections.singleton(v));
}
@Override
public SampleElements>> samples() {
SampleElements sampleKeys =
((TestMultimapGenerator) multimapGenerator.getInnerGenerator()).sampleKeys();
SampleElements sampleValues =
((TestMultimapGenerator) multimapGenerator.getInnerGenerator()).sampleValues();
return new SampleElements<>(
mapEntry(sampleKeys.e0(), createCollection(sampleValues.e0())),
mapEntry(sampleKeys.e1(), createCollection(sampleValues.e1())),
mapEntry(sampleKeys.e2(), createCollection(sampleValues.e2())),
mapEntry(sampleKeys.e3(), createCollection(sampleValues.e3())),
mapEntry(sampleKeys.e4(), createCollection(sampleValues.e4())));
}
@Override
public Map> create(Object... elements) {
Set keySet = new HashSet<>();
List> builder = new ArrayList<>();
for (Object o : elements) {
Entry entry = (Entry) o;
// These come from Entry>> objects somewhere.
@SuppressWarnings("unchecked")
K key = (K) entry.getKey();
keySet.add(key);
for (Object v : (Collection) entry.getValue()) {
// These come from Entry>> objects somewhere.
@SuppressWarnings("unchecked")
V value = (V) v;
builder.add(mapEntry(key, value));
}
}
checkArgument(keySet.size() == elements.length, "Duplicate keys");
return multimapGenerator.create(builder.toArray()).asMap();
}
@SuppressWarnings("unchecked")
@Override
public Entry>[] createArray(int length) {
return (Entry>[]) new Entry[length];
}
@Override
public Iterable>> order(List>> insertionOrder) {
Map> map = new HashMap<>();
List> builder = new ArrayList<>();
for (Entry> entry : insertionOrder) {
for (V v : entry.getValue()) {
builder.add(mapEntry(entry.getKey(), v));
}
map.put(entry.getKey(), entry.getValue());
}
Iterable> ordered = multimapGenerator.order(builder);
LinkedHashMap> orderedMap = new LinkedHashMap<>();
for (Entry entry : ordered) {
orderedMap.put(entry.getKey(), map.get(entry.getKey()));
}
return orderedMap.entrySet();
}
@Override
public K[] createKeyArray(int length) {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.createKeyArray(length);
}
@SuppressWarnings("unchecked")
@Override
public Collection[] createValueArray(int length) {
return (Collection[]) new Collection[length];
}
}
static class EntriesGenerator>
implements TestCollectionGenerator>, DerivedGenerator {
private final OneSizeTestContainerGenerator> multimapGenerator;
public EntriesGenerator(OneSizeTestContainerGenerator> multimapGenerator) {
this.multimapGenerator = multimapGenerator;
}
@Override
public TestSubjectGenerator getInnerGenerator() {
return multimapGenerator;
}
@Override
public SampleElements> samples() {
return multimapGenerator.samples();
}
@Override
public Collection> create(Object... elements) {
return multimapGenerator.create(elements).entries();
}
@SuppressWarnings("unchecked")
@Override
public Entry[] createArray(int length) {
return (Entry[]) new Entry[length];
}
@Override
public Iterable> order(List> insertionOrder) {
return multimapGenerator.order(insertionOrder);
}
}
static class ValuesGenerator>
implements TestCollectionGenerator {
private final OneSizeTestContainerGenerator> multimapGenerator;
public ValuesGenerator(OneSizeTestContainerGenerator> multimapGenerator) {
this.multimapGenerator = multimapGenerator;
}
@Override
public SampleElements samples() {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleValues();
}
@Override
public Collection create(Object... elements) {
K k =
((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleKeys()
.e0();
Object[] entries = new Object[elements.length];
for (int i = 0; i < elements.length; i++) {
@SuppressWarnings("unchecked") // These come from Entry objects somewhere.
V value = (V) elements[i];
entries[i] = mapEntry(k, value);
}
return multimapGenerator.create(entries).values();
}
@Override
public V[] createArray(int length) {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.createValueArray(length);
}
@Override
public Iterable order(List insertionOrder) {
K k =
((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleKeys()
.e0();
List> entries = new ArrayList<>();
for (V v : insertionOrder) {
entries.add(mapEntry(k, v));
}
Iterable> ordered = multimapGenerator.order(entries);
List orderedValues = new ArrayList<>();
for (Entry entry : ordered) {
orderedValues.add(entry.getValue());
}
return orderedValues;
}
}
static class KeysGenerator>
implements TestMultisetGenerator, DerivedGenerator {
private final OneSizeTestContainerGenerator> multimapGenerator;
public KeysGenerator(OneSizeTestContainerGenerator> multimapGenerator) {
this.multimapGenerator = multimapGenerator;
}
@Override
public TestSubjectGenerator getInnerGenerator() {
return multimapGenerator;
}
@Override
public SampleElements samples() {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator()).sampleKeys();
}
@Override
public Multiset create(Object... elements) {
/*
* This is nasty and complicated, but it's the only way to make sure keys get mapped to enough
* distinct values.
*/
Entry[] entries = new Entry[elements.length];
Map> valueIterators = new HashMap<>();
for (int i = 0; i < elements.length; i++) {
@SuppressWarnings("unchecked") // These come from Entry objects somewhere.
K key = (K) elements[i];
Iterator valueItr = valueIterators.get(key);
if (valueItr == null) {
valueIterators.put(key, valueItr = sampleValuesIterator());
}
entries[i] = mapEntry(key, valueItr.next());
}
return multimapGenerator.create((Object[]) entries).keys();
}
private Iterator sampleValuesIterator() {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleValues()
.iterator();
}
@Override
public K[] createArray(int length) {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.createKeyArray(length);
}
@Override
public Iterable order(List insertionOrder) {
Iterator valueIter = sampleValuesIterator();
List> entries = new ArrayList<>();
for (K k : insertionOrder) {
entries.add(mapEntry(k, valueIter.next()));
}
Iterable> ordered = multimapGenerator.order(entries);
List orderedValues = new ArrayList<>();
for (Entry entry : ordered) {
orderedValues.add(entry.getKey());
}
return orderedValues;
}
}
static class MultimapGetGenerator>
implements TestCollectionGenerator {
final OneSizeTestContainerGenerator> multimapGenerator;
public MultimapGetGenerator(OneSizeTestContainerGenerator> multimapGenerator) {
this.multimapGenerator = multimapGenerator;
}
@Override
public SampleElements samples() {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleValues();
}
@Override
public V[] createArray(int length) {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.createValueArray(length);
}
@Override
public Iterable order(List insertionOrder) {
K k =
((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleKeys()
.e0();
List> entries = new ArrayList<>();
for (V v : insertionOrder) {
entries.add(mapEntry(k, v));
}
Iterable> orderedEntries = multimapGenerator.order(entries);
List values = new ArrayList<>();
for (Entry entry : orderedEntries) {
values.add(entry.getValue());
}
return values;
}
@Override
public Collection create(Object... elements) {
Entry[] array = multimapGenerator.createArray(elements.length);
K k =
((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleKeys()
.e0();
for (int i = 0; i < elements.length; i++) {
@SuppressWarnings("unchecked") // These come from Entry objects somewhere.
V value = (V) elements[i];
array[i] = mapEntry(k, value);
}
return multimapGenerator.create((Object[]) array).get(k);
}
}
static class MultimapAsMapGetGenerator>
extends MultimapGetGenerator {
public MultimapAsMapGetGenerator(
OneSizeTestContainerGenerator> multimapGenerator) {
super(multimapGenerator);
}
@Override
public Collection create(Object... elements) {
Entry[] array = multimapGenerator.createArray(elements.length);
K k =
((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleKeys()
.e0();
for (int i = 0; i < elements.length; i++) {
@SuppressWarnings("unchecked") // These come from Entry objects somewhere.
V value = (V) elements[i];
array[i] = mapEntry(k, value);
}
return multimapGenerator.create((Object[]) array).asMap().get(k);
}
}
private static class ReserializedMultimapGenerator>
implements TestMultimapGenerator {
private final OneSizeTestContainerGenerator> multimapGenerator;
public ReserializedMultimapGenerator(
OneSizeTestContainerGenerator> multimapGenerator) {
this.multimapGenerator = multimapGenerator;
}
@Override
public SampleElements> samples() {
return multimapGenerator.samples();
}
@Override
public Entry[] createArray(int length) {
return multimapGenerator.createArray(length);
}
@Override
public Iterable> order(List> insertionOrder) {
return multimapGenerator.order(insertionOrder);
}
@Override
public M create(Object... elements) {
return SerializableTester.reserialize(
((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.create(elements));
}
@Override
public K[] createKeyArray(int length) {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.createKeyArray(length);
}
@Override
public V[] createValueArray(int length) {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.createValueArray(length);
}
@Override
public SampleElements sampleKeys() {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator()).sampleKeys();
}
@Override
public SampleElements sampleValues() {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.sampleValues();
}
@Override
public Collection createCollection(Iterable values) {
return ((TestMultimapGenerator) multimapGenerator.getInnerGenerator())
.createCollection(values);
}
}
}
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