1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.collections4.functors;
18
19 import static org.junit.jupiter.api.Assertions.assertFalse;
20 import static org.junit.jupiter.api.Assertions.assertSame;
21 import static org.junit.jupiter.api.Assertions.assertTrue;
22
23 import java.util.Collections;
24
25 import org.apache.commons.collections4.Predicate;
26 import org.junit.jupiter.api.Test;
27
28 /**
29 * Base class for tests of AnyPredicate, AllPredicate, and OnePredicate.
30 */
31 public abstract class AbstractAnyAllOnePredicateTest<T> extends AbstractCompositePredicateTest<T> {
32
33 /**
34 * Creates a new {@code TestCompositePredicate}.
35 *
36 * @param testValue the value which the mock predicates should expect to see (may be null).
37 */
38 protected AbstractAnyAllOnePredicateTest(final T testValue) {
39 super(testValue);
40 }
41
42 /**
43 * Tests whether {@code getInstance} with a one element array returns the first element in the array.
44 */
45 @Override
46 @SuppressWarnings("unchecked")
47 @Test
48 public final void singleElementArrayToGetInstance() {
49 final Predicate<T> predicate = createMockPredicate(null);
50 final Predicate<T> allPredicate = getPredicateInstance(predicate);
51 assertSame(predicate, allPredicate, "expected argument to be returned by getInstance()");
52 }
53
54 /**
55 * Tests that passing a singleton collection to {@code getInstance} returns the single element in the
56 * collection.
57 */
58 @Override
59 @Test
60 public final void singletonCollectionToGetInstance() {
61 final Predicate<T> predicate = createMockPredicate(null);
62 final Predicate<T> allPredicate = getPredicateInstance(
63 Collections.<Predicate<T>>singleton(predicate));
64 assertSame(predicate, allPredicate, "expected singleton collection member to be returned by getInstance()");
65 }
66
67 /**
68 * Tests creating composite predicate instances with single predicates and verifies that the composite returns
69 * the same value as the single predicate does.
70 */
71 @SuppressWarnings("boxing")
72 public final void singleValues() {
73 assertTrue(getPredicateInstance(true).evaluate(null));
74 assertFalse(getPredicateInstance(false).evaluate(null));
75 }
76
77 }