/**
    * 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.lang3.builder;
  
  import static org.junit.Assert.assertEquals;
  
  import org.junit.Test;
  
  
  /**
   * Unit tests {@link Diff}.
   *
   * @version $Id$
   */
  public class DiffTest {
  
      private static final String FIELD_NAME = "field";
      private static final Diff<Boolean> booleanDiff = new BooleanDiff(FIELD_NAME);
      
      private static class BooleanDiff extends Diff<Boolean> {        
          private static final long serialVersionUID = 1L;
  
          protected BooleanDiff(final String fieldName) {
              super(fieldName);        
          }
  
          @Override
          public Boolean getLeft() {
              return Boolean.TRUE;
          }
  
          @Override
          public Boolean getRight() {
              return Boolean.FALSE;
          }        
      }
      
      @Test(expected = UnsupportedOperationException.class)
      public void testCannotModify() {
          booleanDiff.setValue(Boolean.FALSE);
      }
      
      @Test
      public void testGetFieldName() {
          assertEquals(FIELD_NAME, booleanDiff.getFieldName());
      }
      
      @Test
      public void testGetType() {
          assertEquals(Boolean.class, booleanDiff.getType());
      }
      
      @Test
      public void testToString() {
          assertEquals(String.format("[%s: %s, %s]", FIELD_NAME, booleanDiff.getLeft(), 
                  booleanDiff.getRight()), booleanDiff.toString());
      }
  }