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1   /*
2    * Copyright (C) 2015 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  
17  package com.google.common.collect.testing.testers;
18  
19  import static com.google.common.collect.testing.features.CollectionFeature.KNOWN_ORDER;
20  
21  import com.google.common.annotations.GwtCompatible;
22  import com.google.common.collect.testing.AbstractCollectionTester;
23  import com.google.common.collect.testing.Helpers;
24  import com.google.common.collect.testing.features.CollectionFeature;
25  import java.util.ArrayList;
26  import java.util.Arrays;
27  import java.util.List;
28  
29  /**
30   * A generic JUnit test which tests {@code forEach} operations on a collection.
31   * Can't be invoked directly; please see
32   * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
33   *
34   * @author Louis Wasserman
35   */
36  @GwtCompatible
37  public class CollectionForEachTester<E> extends AbstractCollectionTester<E> {
38    @CollectionFeature.Require(absent = KNOWN_ORDER)
39    public void testForEachUnknownOrder() {
40      List<E> elements = new ArrayList<E>();
41      collection.forEach(elements::add);
42      Helpers.assertEqualIgnoringOrder(
43          Arrays.asList(createSamplesArray()), elements);
44    }
45  
46    @CollectionFeature.Require(KNOWN_ORDER)
47    public void testForEachKnownOrder() {
48      List<E> elements = new ArrayList<E>();
49      collection.forEach(elements::add);
50      List<E> expected = Helpers.copyToList(getOrderedElements());
51      assertEquals("Different ordered iteration", expected, elements);
52    }
53  }