/*
    * Copyright 2007 Kasper B. Graversen
    * 
    * Licensed 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.supercsv.cellprocessor;
  
  import static org.junit.Assert.assertEquals;
  import static org.supercsv.SuperCsvTestUtils.ANONYMOUS_CSVCONTEXT;
  
  import org.junit.Before;
  import org.junit.Test;
  import org.supercsv.cellprocessor.ift.CellProcessor;
  import org.supercsv.mock.IdentityTransform;
  
  /**
   * Tests the ConvertNull processor.
   * 
   * @author James Bassett
   */
  public class ConvertNullToTest {
  	
  	private static final String CONVERTED_VALUE = "previously null!";
  	
  	private CellProcessor processor;
  	private CellProcessor processorChain;
  	
  	/**
  	 * Sets up the processors for the test using all constructor combinations.
  	 */
  	@Before
  	public void setUp() {
  		processor = new ConvertNullTo(CONVERTED_VALUE);
  		processorChain = new ConvertNullTo(CONVERTED_VALUE, new IdentityTransform());
  	}
  	
  	/**
  	 * Tests unchained/chained execution with a null value (should return converted value).
  	 */
  	@Test
  	public void testWithNullValue() {
  		assertEquals(CONVERTED_VALUE, processor.execute(null, ANONYMOUS_CSVCONTEXT));
  		assertEquals(CONVERTED_VALUE, processorChain.execute(null, ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests unchained/chained execution with a non-null value (should return input unchanged).
  	 */
  	@Test
  	public void testWithNonNullValue() {
  		String notNull = "not null!";
  		assertEquals(notNull, processor.execute(notNull, ANONYMOUS_CSVCONTEXT));
  		assertEquals(notNull, processorChain.execute(notNull, ANONYMOUS_CSVCONTEXT));
  	}
  	
  }