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.apache.commons.collections4.functors.NullPredicate.nullPredicate;
20 import static org.junit.jupiter.api.Assertions.assertSame;
21
22 import org.apache.commons.collections4.Predicate;
23 import org.junit.jupiter.api.Test;
24
25 public class NullPredicateTest extends AbstractPredicateTest {
26 @Override
27 protected Predicate<?> generatePredicate() {
28 return nullPredicate();
29 }
30
31 @Test
32 public void testEnsurePredicateCanBeTypedWithoutWarning() throws Exception {
33 final Predicate<String> predicate = NullPredicate.nullPredicate();
34 assertPredicateFalse(predicate, cString);
35 }
36
37 @Test
38 public void testNullPredicate() {
39 assertSame(NullPredicate.nullPredicate(), NullPredicate.nullPredicate());
40 assertPredicateTrue(nullPredicate(), null);
41 }
42 }