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