001/* 002 * Copyright (C) 2013 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.SortedSet; 021import org.checkerframework.checker.nullness.qual.Nullable; 022 023/** 024 * Creates sorted sets, containing sample elements, to be tested. 025 * 026 * @author Louis Wasserman 027 */ 028@GwtCompatible 029@ElementTypesAreNonnullByDefault 030public interface TestSortedSetGenerator<E extends @Nullable Object> extends TestSetGenerator<E> { 031 @Override 032 SortedSet<E> create(Object... elements); 033 034 /** 035 * Returns an element less than the {@link #samples()} and less than {@link 036 * #belowSamplesGreater()}. 037 */ 038 E belowSamplesLesser(); 039 040 /** 041 * Returns an element less than the {@link #samples()} but greater than {@link 042 * #belowSamplesLesser()}. 043 */ 044 E belowSamplesGreater(); 045 046 /** 047 * Returns an element greater than the {@link #samples()} but less than {@link 048 * #aboveSamplesGreater()}. 049 */ 050 E aboveSamplesLesser(); 051 052 /** 053 * Returns an element greater than the {@link #samples()} and greater than {@link 054 * #aboveSamplesLesser()}. 055 */ 056 E aboveSamplesGreater(); 057}