001/*
002 * Copyright (C) 2015 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.testers;
018
019import static com.google.common.collect.testing.Helpers.assertEqualIgnoringOrder;
020import static com.google.common.collect.testing.Helpers.copyToList;
021import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
022import static java.util.Arrays.asList;
023
024import com.google.common.annotations.GwtCompatible;
025import com.google.common.collect.testing.AbstractCollectionTester;
026import com.google.common.collect.testing.features.CollectionFeature;
027import java.util.ArrayList;
028import java.util.List;
029
030/**
031 * A generic JUnit test which tests {@code forEach} operations on a collection. Can't be invoked
032 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
033 *
034 * @author Louis Wasserman
035 */
036@GwtCompatible
037public class CollectionForEachTester<E> extends AbstractCollectionTester<E> {
038  @CollectionFeature.Require(absent = KNOWN_ORDER)
039  public void testForEachUnknownOrder() {
040    List<E> elements = new ArrayList<>();
041    collection.forEach(elements::add);
042    assertEqualIgnoringOrder(asList(createSamplesArray()), elements);
043  }
044
045  @CollectionFeature.Require(KNOWN_ORDER)
046  public void testForEachKnownOrder() {
047    List<E> elements = new ArrayList<>();
048    collection.forEach(elements::add);
049    List<E> expected = copyToList(getOrderedElements());
050    assertEquals("Different ordered iteration", expected, elements);
051  }
052}