Java

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
import static com.google.common.collect.testing.features.CollectionSize.ZERO;
21
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
22
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
23

24
import com.google.common.annotations.GwtCompatible;
25
import com.google.common.collect.testing.AbstractMapTester;
26
import com.google.common.collect.testing.Helpers;
27
import com.google.common.collect.testing.features.CollectionFeature;
28
import com.google.common.collect.testing.features.CollectionSize;
29
import com.google.common.collect.testing.features.MapFeature;
30
import java.util.ArrayList;
31
import java.util.Arrays;
32
import java.util.List;
33
import java.util.Map;
34
import java.util.Map.Entry;
35
import org.junit.Ignore;
36

37
/**
38
 * A generic JUnit test which tests {@link Map#forEach}. Can't be invoked directly; please see
39
 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
40
 *
41
 * @author Louis Wasserman
42
 */
43
@GwtCompatible
44
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
45
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
46
public class MapForEachTester<K, V> extends AbstractMapTester<K, V> {
47
  @CollectionFeature.Require(KNOWN_ORDER)
48
  public void testForEachKnownOrder() {
49
    List<Entry<K, V>> entries = new ArrayList<>();
50
    getMap().forEach((k, v) -> entries.add(entry(k, v)));
51
    assertEquals(getOrderedElements(), entries);
52
  }
53

54
  @CollectionFeature.Require(absent = KNOWN_ORDER)
55
  public void testForEachUnknownOrder() {
56
    List<Entry<K, V>> entries = new ArrayList<>();
57
    getMap().forEach((k, v) -> entries.add(entry(k, v)));
58
    Helpers.assertEqualIgnoringOrder(getSampleEntries(), entries);
59
  }
60

61
  @MapFeature.Require(ALLOWS_NULL_KEYS)
62
  @CollectionSize.Require(absent = ZERO)
63
  public void testForEach_nullKeys() {
64
    initMapWithNullKey();
65
    List<Entry<K, V>> expectedEntries = Arrays.asList(createArrayWithNullKey());
66
    List<Entry<K, V>> entries = new ArrayList<>();
67
    getMap().forEach((k, v) -> entries.add(entry(k, v)));
68
    Helpers.assertEqualIgnoringOrder(expectedEntries, entries);
69
  }
70

71
  @MapFeature.Require(ALLOWS_NULL_VALUES)
72
  @CollectionSize.Require(absent = ZERO)
73
  public void testForEach_nullValues() {
74
    initMapWithNullValue();
75
    List<Entry<K, V>> expectedEntries = Arrays.asList(createArrayWithNullValue());
76
    List<Entry<K, V>> entries = new ArrayList<>();
77
    getMap().forEach((k, v) -> entries.add(entry(k, v)));
78
    Helpers.assertEqualIgnoringOrder(expectedEntries, entries);
79
  }
80
}
81