1   /*
2    * Copyright (C) 2013 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  package com.google.common.collect.testing;
17  
18  import com.google.common.annotations.GwtCompatible;
19  
20  import java.util.SortedSet;
21  
22  /**
23   * Creates sorted sets, containing sample elements, to be tested.
24   *
25   * @author Louis Wasserman
26   */
27  @GwtCompatible
28  public interface TestSortedSetGenerator<E> extends TestSetGenerator<E> {
29    @Override
30    SortedSet<E> create(Object... elements);
31  
32    /**
33     * Returns an element less than the {@link #samples()} and less than
34     * {@link #belowSamplesGreater()}.
35     */
36    E belowSamplesLesser();
37  
38    /**
39     * Returns an element less than the {@link #samples()} but greater than
40     * {@link #belowSamplesLesser()}.
41     */
42    E belowSamplesGreater();
43  
44    /**
45     * Returns an element greater than the {@link #samples()} but less than
46     * {@link #aboveSamplesGreater()}.
47     */
48    E aboveSamplesLesser();
49  
50    /**
51     * Returns an element greater than the {@link #samples()} and greater than
52     * {@link #aboveSamplesLesser()}.
53     */
54    E aboveSamplesGreater();
55  }