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.UnaryFunction;
025 import org.apache.commons.functor.UnaryProcedure;
026 import org.apache.commons.functor.core.Constant;
027 import org.apache.commons.functor.core.NoOp;
028 import org.junit.Test;
029
030 /**
031 * @version $Revision: 1171255 $ $Date: 2011-09-15 22:27:39 +0200 (Thu, 15 Sep 2011) $
032 * @author Rodney Waldhoff
033 */
034 public class TestUnaryFunctionUnaryProcedure extends BaseFunctorTest {
035
036 // Functor Testing Framework
037 // ------------------------------------------------------------------------
038
039 protected Object makeFunctor() {
040 return new UnaryFunctionUnaryProcedure<Object>(Constant.of("K"));
041 }
042
043 // Tests
044 // ------------------------------------------------------------------------
045
046 @Test
047 public void testRun() throws Exception {
048 class EvaluateCounter implements UnaryFunction<Object, Integer> {
049 int count = 0;
050 public Integer evaluate(Object a) { return count++; }
051 }
052 EvaluateCounter counter = new EvaluateCounter();
053 UnaryProcedure<Object> p = new UnaryFunctionUnaryProcedure<Object>(counter);
054 assertEquals(0,counter.count);
055 p.run(null);
056 assertEquals(1,counter.count);
057 p.run("x");
058 assertEquals(2,counter.count);
059 }
060
061 @Test
062 public void testEquals() throws Exception {
063 UnaryProcedure<Object> p = new UnaryFunctionUnaryProcedure<Object>(Constant.of("K"));
064 assertEquals(p,p);
065 assertObjectsAreEqual(p,new UnaryFunctionUnaryProcedure<Object>(Constant.of("K")));
066 assertObjectsAreNotEqual(p,NoOp.INSTANCE);
067 assertObjectsAreNotEqual(p,new UnaryFunctionUnaryProcedure<Object>(Constant.of("J")));
068 }
069
070 @Test
071 public void testAdaptNull() throws Exception {
072 assertNull(UnaryFunctionUnaryProcedure.adapt(null));
073 }
074
075 @Test
076 public void testAdapt() throws Exception {
077 assertNotNull(UnaryFunctionUnaryProcedure.adapt(Constant.of("K")));
078 }
079 }