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.jspecify.annotations.NullMarked;
023import org.jspecify.annotations.Nullable;
024
025/**
026 * The subject-generator interface accepted by Collection testers, for testing a Collection at one
027 * particular {@link CollectionSize}.
028 *
029 * <p>This interface should not be implemented outside this package; {@link
030 * PerCollectionSizeTestSuiteBuilder} constructs instances of it from a more general {@link
031 * TestCollectionGenerator}.
032 *
033 * @author George van den Driessche
034 */
035@GwtCompatible
036@NullMarked
037public interface OneSizeTestContainerGenerator<T, E extends @Nullable Object>
038    extends TestSubjectGenerator<T>, TestContainerGenerator<T, E> {
039  TestContainerGenerator<T, E> getInnerGenerator();
040
041  Collection<E> getSampleElements(int howMany);
042
043  CollectionSize getCollectionSize();
044}