001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.commons.functor.adapter;
018
019 import static org.junit.Assert.assertEquals;
020 import static org.junit.Assert.assertNotNull;
021 import static org.junit.Assert.assertNull;
022
023 import org.apache.commons.functor.BaseFunctorTest;
024 import org.apache.commons.functor.Function;
025 import org.apache.commons.functor.core.Constant;
026 import org.junit.Test;
027
028 /**
029 * @version $Revision: 1171255 $ $Date: 2011-09-15 22:27:39 +0200 (Thu, 15 Sep 2011) $
030 * @author Rodney Waldhoff
031 */
032 public class TestPredicateFunction extends BaseFunctorTest {
033
034 // Functor Testing Framework
035 // ------------------------------------------------------------------------
036
037 protected Object makeFunctor() {
038 return new PredicateFunction(Constant.of(true));
039 }
040
041 // Tests
042 // ------------------------------------------------------------------------
043
044 @Test
045 public void testTestWhenTrue() throws Exception {
046 Function<Boolean> f = new PredicateFunction(Constant.TRUE);
047 assertEquals(Boolean.TRUE,f.evaluate());
048 }
049
050 @Test
051 public void testTestWhenFalse() throws Exception {
052 Function<Boolean> f = new PredicateFunction(Constant.FALSE);
053 assertEquals(Boolean.FALSE,f.evaluate());
054 }
055
056 @Test
057 public void testEquals() throws Exception {
058 Function<Boolean> f = new PredicateFunction(Constant.TRUE);
059 assertEquals(f,f);
060 assertObjectsAreEqual(f,new PredicateFunction(Constant.TRUE));
061 assertObjectsAreNotEqual(f,Constant.of("x"));
062 assertObjectsAreNotEqual(f,new PredicateFunction(Constant.FALSE));
063 }
064
065 @Test
066 public void testAdaptNull() throws Exception {
067 assertNull(FunctionPredicate.adapt(null));
068 }
069
070 @Test
071 public void testAdapt() throws Exception {
072 assertNotNull(PredicateFunction.adapt(Constant.TRUE));
073 }
074 }