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 */
017package org.apache.commons.functor.adapter;
018
019import static org.junit.Assert.assertEquals;
020import static org.junit.Assert.assertNotNull;
021import static org.junit.Assert.assertNull;
022import static org.junit.Assert.assertTrue;
023
024import org.apache.commons.functor.BaseFunctorTest;
025import org.apache.commons.functor.Function;
026import org.apache.commons.functor.core.Constant;
027import org.junit.Test;
028
029/**
030 * @version $Revision: 1365377 $ $Date: 2012-07-24 21:59:23 -0300 (Tue, 24 Jul 2012) $
031 */
032public class TestNullaryFunctionFunction extends BaseFunctorTest {
033
034    // Functor Testing Framework
035    // ------------------------------------------------------------------------
036
037    @Override
038    protected Object makeFunctor() {
039        return new NullaryFunctionFunction<Object, Object>(Constant.of("xyzzy"));
040    }
041
042    // Tests
043    // ------------------------------------------------------------------------
044
045    @Test
046    public void testEvaluate() throws Exception {
047        Function<Object, Object> f = new NullaryFunctionFunction<Object, Object>(Constant.of("xyzzy"));
048        assertEquals("xyzzy",f.evaluate(null));
049        assertEquals("xyzzy",f.evaluate("abc"));
050    }
051
052    @Test
053    public void testEquals() throws Exception {
054        Function<Object, Object> f = new NullaryFunctionFunction<Object, Object>(Constant.of("xyzzy"));
055        assertEquals(f,f);
056        assertObjectsAreEqual(f,new NullaryFunctionFunction<Object, Object>(Constant.of("xyzzy")));
057        assertObjectsAreNotEqual(f,Constant.of("x"));
058        assertObjectsAreNotEqual(f,new NullaryFunctionFunction<Object, Object>(Constant.of(null)));
059        assertObjectsAreNotEqual(f,Constant.of(null));
060        assertTrue(!f.equals(null));
061    }
062
063    @Test
064    public void testAdaptNull() throws Exception {
065        assertNull(NullaryFunctionFunction.adapt(null));
066    }
067
068    @Test
069    public void testAdapt() throws Exception {
070        assertNotNull(NullaryFunctionFunction.adapt(Constant.of("xyzzy")));
071    }
072}