001/*
002 * Copyright (C) 2008 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing;
018
019import static java.util.Collections.sort;
020
021import com.google.common.annotations.GwtCompatible;
022import java.util.List;
023import java.util.SortedSet;
024
025/**
026 * Create string sets for testing collections that are sorted by natural ordering.
027 *
028 * @author Jared Levy
029 */
030@GwtCompatible
031@ElementTypesAreNonnullByDefault
032public abstract class TestStringSortedSetGenerator extends TestStringSetGenerator
033    implements TestSortedSetGenerator<String> {
034
035  @Override
036  public SortedSet<String> create(Object... elements) {
037    return (SortedSet<String>) super.create(elements);
038  }
039
040  @Override
041  protected abstract SortedSet<String> create(String[] elements);
042
043  /** Sorts the elements by their natural ordering. */
044  @Override
045  public List<String> order(List<String> insertionOrder) {
046    sort(insertionOrder);
047    return insertionOrder;
048  }
049
050  @Override
051  public String belowSamplesLesser() {
052    return "!! a";
053  }
054
055  @Override
056  public String belowSamplesGreater() {
057    return "!! b";
058  }
059
060  @Override
061  public String aboveSamplesLesser() {
062    return "~~ a";
063  }
064
065  @Override
066  public String aboveSamplesGreater() {
067    return "~~ b";
068  }
069}