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 com.google.common.collect.testing.features.CollectionSize;
021import java.util.Collection;
022import org.checkerframework.checker.nullness.qual.Nullable;
023
024/**
025 * The subject-generator interface accepted by Collection testers, for testing a Collection at one
026 * particular {@link CollectionSize}.
027 *
028 * <p>This interface should not be implemented outside this package; {@link
029 * PerCollectionSizeTestSuiteBuilder} constructs instances of it from a more general {@link
030 * TestCollectionGenerator}.
031 *
032 * @author George van den Driessche
033 */
034@GwtCompatible
035@ElementTypesAreNonnullByDefault
036public interface OneSizeTestContainerGenerator<T, E extends @Nullable Object>
037    extends TestSubjectGenerator<T>, TestContainerGenerator<T, E> {
038  TestContainerGenerator<T, E> getInnerGenerator();
039
040  Collection<E> getSampleElements(int howMany);
041
042  CollectionSize getCollectionSize();
043}