/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.functor.core;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertSame;
  import static org.junit.Assert.assertTrue;
  
  import org.apache.commons.functor.BaseFunctorTest;
  import org.apache.commons.functor.BinaryFunction;
  import org.apache.commons.functor.BinaryPredicate;
  import org.junit.Test;
  
  /**
   * @version $Revision: 1541658 $ $Date: 2013-11-13 19:54:05 +0100 (Mi, 13 Nov 2013) $
   */
  public class TestRightIdentity extends BaseFunctorTest {
  
      // Functor Testing Framework
      // ------------------------------------------------------------------------
  
      @Override
      protected Object makeFunctor() {
          return RightIdentity.FUNCTION;
      }
  
      // Tests
      // ------------------------------------------------------------------------
  
      @Test
      public void testJavabeanConstructor() {
          assertNotNull(new RightIdentity()); // Public constructor for JavaBean
      }
  
      @Test
      public void testEvaluate() throws Exception {
          BinaryFunction<Object, Object, Object> f = RightIdentity.FUNCTION;
          assertNull(f.evaluate(null,null));
          assertNull(f.evaluate("xyzzy",null));
          assertEquals("xyzzy",f.evaluate("abcdefg","xyzzy"));
          assertEquals("xyzzy",f.evaluate(null,"xyzzy"));
          assertEquals(Integer.valueOf(3),f.evaluate(null,Integer.valueOf(3)));
          Object obj = Long.valueOf(12345L);
          assertSame(obj,f.evaluate(null,obj));
          assertSame(obj,f.evaluate(obj,obj));
      }
  
      @Test(expected=NullPointerException.class)
      public void testTest() throws Exception {
          BinaryPredicate<Object, Boolean> p = RightIdentity.PREDICATE;
          assertTrue(p.test(null,Boolean.TRUE));
          assertTrue(!p.test(null,Boolean.FALSE));
          p.test(null,null);
      }
  
      @Test
      public void testEquals() throws Exception {
          BinaryFunction<Object, Object, Object> f = RightIdentity.FUNCTION;
          assertEquals(f,f);
          assertObjectsAreEqual(f,RightIdentity.function());
          assertObjectsAreNotEqual(f,new Identity<Object>());
          assertObjectsAreNotEqual(f,LeftIdentity.function());
          assertObjectsAreNotEqual(f,Constant.TRUE);
          assertObjectsAreNotEqual(f,Constant.of("abcde"));
      }
  
      @Test
      public void testConstant() throws Exception {
          assertEquals(RightIdentity.function(),RightIdentity.function());
      }
  }