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 com.google.common.annotations.GwtCompatible;
020import java.util.Collections;
021import java.util.List;
022import java.util.SortedSet;
023
024/**
025 * Create string sets for testing collections that are sorted by natural ordering.
026 *
027 * @author Jared Levy
028 */
029@GwtCompatible
030@ElementTypesAreNonnullByDefault
031public abstract class TestStringSortedSetGenerator extends TestStringSetGenerator
032    implements TestSortedSetGenerator<String> {
033
034  @Override
035  public SortedSet<String> create(Object... elements) {
036    return (SortedSet<String>) super.create(elements);
037  }
038
039  @Override
040  protected abstract SortedSet<String> create(String[] elements);
041
042  /** Sorts the elements by their natural ordering. */
043  @Override
044  public List<String> order(List<String> insertionOrder) {
045    Collections.sort(insertionOrder);
046    return insertionOrder;
047  }
048
049  @Override
050  public String belowSamplesLesser() {
051    return "!! a";
052  }
053
054  @Override
055  public String belowSamplesGreater() {
056    return "!! b";
057  }
058
059  @Override
060  public String aboveSamplesLesser() {
061    return "~~ a";
062  }
063
064  @Override
065  public String aboveSamplesGreater() {
066    return "~~ b";
067  }
068}