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NavigableSetTestSuiteBuilder.java
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NavigableSetTestSuiteBuilder.java
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/*
* Copyright (C) 2010 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;
import static com.google.common.collect.testing.features.CollectionFeature.DESCENDING_VIEW;
import static com.google.common.collect.testing.features.CollectionFeature.SUBSET_VIEW;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.testing.DerivedCollectionGenerators.Bound;
import com.google.common.collect.testing.DerivedCollectionGenerators.SortedSetSubsetTestSetGenerator;
import com.google.common.collect.testing.features.Feature;
import com.google.common.collect.testing.testers.NavigableSetNavigationTester;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.NavigableSet;
import java.util.Set;
import java.util.SortedSet;
import junit.framework.TestSuite;
/**
* Creates, based on your criteria, a JUnit test suite that exhaustively tests a NavigableSet
* implementation.
*/
@GwtIncompatible
public final class NavigableSetTestSuiteBuilder<E> extends SortedSetTestSuiteBuilder<E> {
public static <E> NavigableSetTestSuiteBuilder<E> using(TestSortedSetGenerator<E> generator) {
NavigableSetTestSuiteBuilder<E> builder = new NavigableSetTestSuiteBuilder<>();
builder.usingGenerator(generator);
return builder;
}
@Override
protected List<TestSuite> createDerivedSuites(
FeatureSpecificTestSuiteBuilder<?, ? extends OneSizeTestContainerGenerator<Collection<E>, E>>
parentBuilder) {
List<TestSuite> derivedSuites = new ArrayList<>(super.createDerivedSuites(parentBuilder));
if (!parentBuilder.getFeatures().contains(SUBSET_VIEW)) {
// Other combinations are inherited from SortedSetTestSuiteBuilder.
derivedSuites.add(createSubsetSuite(parentBuilder, Bound.NO_BOUND, Bound.INCLUSIVE));
derivedSuites.add(createSubsetSuite(parentBuilder, Bound.EXCLUSIVE, Bound.NO_BOUND));
derivedSuites.add(createSubsetSuite(parentBuilder, Bound.EXCLUSIVE, Bound.EXCLUSIVE));
derivedSuites.add(createSubsetSuite(parentBuilder, Bound.EXCLUSIVE, Bound.INCLUSIVE));
derivedSuites.add(createSubsetSuite(parentBuilder, Bound.INCLUSIVE, Bound.INCLUSIVE));
}
if (!parentBuilder.getFeatures().contains(DESCENDING_VIEW)) {
derivedSuites.add(createDescendingSuite(parentBuilder));
}
return derivedSuites;
}
public static final class NavigableSetSubsetTestSetGenerator<E>
extends SortedSetSubsetTestSetGenerator<E> {
public NavigableSetSubsetTestSetGenerator(
TestSortedSetGenerator<E> delegate, Bound to, Bound from) {
super(delegate, to, from);
}
@Override
NavigableSet<E> createSubSet(SortedSet<E> sortedSet, E firstExclusive, E lastExclusive) {
NavigableSet<E> set = (NavigableSet<E>) sortedSet;
if (from == Bound.NO_BOUND && to == Bound.INCLUSIVE) {
return set.headSet(lastInclusive, true);
} else if (from == Bound.EXCLUSIVE && to == Bound.NO_BOUND) {
return set.tailSet(firstExclusive, false);
} else if (from == Bound.EXCLUSIVE && to == Bound.EXCLUSIVE) {
return set.subSet(firstExclusive, false, lastExclusive, false);
} else if (from == Bound.EXCLUSIVE && to == Bound.INCLUSIVE) {
return set.subSet(firstExclusive, false, lastInclusive, true);
} else if (from == Bound.INCLUSIVE && to == Bound.INCLUSIVE) {
return set.subSet(firstInclusive, true, lastInclusive, true);
} else {
return (NavigableSet<E>) super.createSubSet(set, firstExclusive, lastExclusive);
}
}
}
@Override
public NavigableSetTestSuiteBuilder<E> newBuilderUsing(
TestSortedSetGenerator<E> delegate, Bound to, Bound from) {
return using(new NavigableSetSubsetTestSetGenerator<E>(delegate, to, from));
}
/** Create a suite whose maps are descending views of other maps. */
private TestSuite createDescendingSuite(
FeatureSpecificTestSuiteBuilder<?, ? extends OneSizeTestContainerGenerator<Collection<E>, E>>
parentBuilder) {
TestSetGenerator<E> delegate =
(TestSetGenerator<E>) parentBuilder.getSubjectGenerator().getInnerGenerator();
List<Feature<?>> features = new ArrayList<>();
features.add(DESCENDING_VIEW);
features.addAll(parentBuilder.getFeatures());
return NavigableSetTestSuiteBuilder.using(
new TestSetGenerator<E>() {
@Override
public SampleElements<E> samples() {
return delegate.samples();
}
@Override
public E[] createArray(int length) {
return delegate.createArray(length);
}
@Override
public Iterable<E> order(List<E> insertionOrder) {
List<E> list = new ArrayList<>();
for (E e : delegate.order(insertionOrder)) {
list.add(e);
}
Collections.reverse(list);
return list;
}
@Override
public Set<E> create(Object... elements) {
NavigableSet<E> navigableSet = (NavigableSet<E>) delegate.create(elements);
return navigableSet.descendingSet();
}
})
.named(parentBuilder.getName() + " descending")
.withFeatures(features)
.suppressing(parentBuilder.getSuppressedTests())
.createTestSuite();
}
@SuppressWarnings("rawtypes") // class literals
@Override
protected List<Class<? extends AbstractTester>> getTesters() {
List<Class<? extends AbstractTester>> testers = Helpers.copyToList(super.getTesters());
testers.add(NavigableSetNavigationTester.class);
return testers;
}
}