/*
    * 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.junit.Assert.assertNull;
  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 Optional processor.
   * 
   * @author Kasper B. Graversen
   * @author James Bassett
   */
  public class OptionalTest {
  	
  	private CellProcessor processor;
  	private CellProcessor processorChain;
  	
  	/**
  	 * Sets up the processors for the test using all constructor combinations.
  	 */
  	@Before
  	public void setUp() {
  		processor = new Optional();
  		processorChain = new Optional(new IdentityTransform());
  	}
  	
  	/**
  	 * Tests unchained/chained execution with empty string as input.
  	 */
  	@Test
  	public void testEmptyString() {
  		assertEquals("", processor.execute("", ANONYMOUS_CSVCONTEXT));
  		assertEquals("", processorChain.execute("", ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests unchained/chained execution with a space as input.
  	 */
  	@Test
  	public void testSpace() {
  		assertEquals(" ", processor.execute(" ", ANONYMOUS_CSVCONTEXT));
  		assertEquals(" ", processorChain.execute(" ", ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests unchained/chained execution with normal input (not "").
  	 */
  	@Test
  	public void testNormalInput() {
  		String normal = "normal";
  		assertEquals(normal, processor.execute(normal, ANONYMOUS_CSVCONTEXT));
  		assertEquals(normal, processorChain.execute(normal, ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests execution with a null input (should return null).
  	 */
  	@Test
  	public void testWithNull() {
  		assertNull(processor.execute(null, ANONYMOUS_CSVCONTEXT));
  		assertNull(processorChain.execute(null, ANONYMOUS_CSVCONTEXT));
  	}
  }