1/*
2 * Copyright (C) 2008 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.google.common.collect.testing;
18
19import com.google.common.annotations.GwtCompatible;
20
21import java.util.Collections;
22import java.util.List;
23import java.util.SortedSet;
24
25/**
26 * Create string sets for testing collections that are sorted by natural
27 * ordering.
28 *
29 * @author Jared Levy
30 */
31@GwtCompatible
32public abstract class TestStringSortedSetGenerator
33    extends TestStringSetGenerator implements TestSortedSetGenerator<String> {
34
35  @Override
36  public SortedSet<String> create(Object... elements) {
37    return (SortedSet<String>) super.create(elements);
38  }
39
40  @Override protected abstract SortedSet<String> create(String[] elements);
41
42  /** Sorts the elements by their natural ordering. */
43  @Override public List<String> order(List<String> insertionOrder) {
44    Collections.sort(insertionOrder);
45    return insertionOrder;
46  }
47
48  @Override
49  public String belowSamplesLesser() {
50    return "!! a";
51  }
52
53  @Override
54  public String belowSamplesGreater() {
55    return "!! b";
56  }
57
58  @Override
59  public String aboveSamplesLesser() {
60    return "~~ a";
61  }
62
63  @Override
64  public String aboveSamplesGreater() {
65    return "~~ b";
66  }
67}
68