/*
    * 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.fail;
  import static org.supercsv.SuperCsvTestUtils.ANONYMOUS_CSVCONTEXT;
  
  import java.util.Arrays;
  
  import org.junit.Before;
  import org.junit.Test;
  import org.supercsv.cellprocessor.ift.CellProcessor;
  import org.supercsv.exception.SuperCsvCellProcessorException;
  import org.supercsv.mock.IdentityTransform;
  
  /**
   * Tests the ParseEnum processor.
   * 
   * @author James Bassett
   */
  public class ParseEnumTest {
  	
  	public enum TestEnum {
  		NORMAL, lowercase, MixedCase
  	}
  	
  	private CellProcessor processor;
  	private CellProcessor processorChain;
  	private CellProcessor ignoreCaseProcessor;
  	private CellProcessor ignoreCaseProcessorChain;
  	
  	/**
  	 * Sets up the processors for the test using all constructor combinations.
  	 */
  	@Before
  	public void setUp() {
  		processor = new ParseEnum(TestEnum.class);
  		processorChain = new ParseEnum(TestEnum.class, new IdentityTransform());
  		ignoreCaseProcessor = new ParseEnum(TestEnum.class, true);
  		ignoreCaseProcessorChain = new ParseEnum(TestEnum.class, true, new IdentityTransform());
  	}
  	
  	/**
  	 * Tests that a normal enum is parsed correctly.
  	 */
  	@Test
  	public void testNormalEnum() {
  		final String input = "NORMAL";
  		assertEquals(TestEnum.NORMAL, processor.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.NORMAL, processorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.NORMAL, ignoreCaseProcessor.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.NORMAL, ignoreCaseProcessorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests that a lowercase enum is parsed correctly.
  	 */
  	@Test
  	public void testLowerCaseEnum() {
  		final String input = "lowercase";
  		assertEquals(TestEnum.lowercase, processor.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.lowercase, processorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.lowercase, ignoreCaseProcessor.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.lowercase, ignoreCaseProcessorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests that a mixed case enum is parsed correctly.
  	 */
  	@Test
  	public void testMixedCaseEnum() {
  		final String input = "MixedCase";
  		assertEquals(TestEnum.MixedCase, processor.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.MixedCase, processorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.MixedCase, ignoreCaseProcessor.execute(input, ANONYMOUS_CSVCONTEXT));
  		assertEquals(TestEnum.MixedCase, ignoreCaseProcessorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests that an input with a different case fails when ignoreCase is false.
  	 */
  	@Test
  	public void testDifferentCaseFailsWhenIgnoreCaseFalse() {
  		final String input = "normal";
  		for( CellProcessor p : Arrays.asList(processor, processorChain) ) {
 			try {
 				p.execute(input, ANONYMOUS_CSVCONTEXT);
 				fail("should have thrown SuperCsvCellProcessorException");
 			}
 			catch(SuperCsvCellProcessorException e) {
 				assertEquals("'normal' could not be parsed as a enum of type " + TestEnum.class.getName(),
 					e.getMessage());
 			}
 		}
 	}
 	
 	/**
 	 * Tests that an input with a different case parses successfully when ignoreCase is true.
 	 */
 	@Test
 	public void testDifferentCaseParsesWhenIgnoreCaseTrue() {
 		final String input = "normal";
 		for( CellProcessor p : Arrays.asList(ignoreCaseProcessor, ignoreCaseProcessorChain) ) {
 			assertEquals(TestEnum.NORMAL, p.execute(input, ANONYMOUS_CSVCONTEXT));
 		}
 	}
 	
 	/**
 	 * Tests execution with a null input (should throw an Exception).
 	 */
 	@Test(expected = SuperCsvCellProcessorException.class)
 	public void testWithNull() {
 		processor.execute(null, ANONYMOUS_CSVCONTEXT);
 	}
 	
 	/**
 	 * Tests the first constructor with a null enum class.
 	 */
 	@Test(expected = NullPointerException.class)
 	public void testFirstConstructorsWithNullEnumClass(){
 		new ParseEnum(null);
 	}
 	
 	/**
 	 * Tests the second constructor with a null enum class.
 	 */
 	@Test(expected = NullPointerException.class)
 	public void testSecondConstructorsWithNullEnumClass(){
 		new ParseEnum(null, false);
 	}
 	
 	/**
 	 * Tests the third constructor with a null enum class.
 	 */
 	@Test(expected = NullPointerException.class)
 	public void testThirdConstructorsWithNullEnumClass(){
 		new ParseEnum(null, new IdentityTransform());
 	}
 	
 	/**
 	 * Tests the fourth constructor with a null enum class.
 	 */
 	@Test(expected = NullPointerException.class)
 	public void testFourthConstructorsWithNullEnumClass(){
 		new ParseEnum(null, false, new IdentityTransform());
 	}
 }