/*
    * 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.constraint;
  
  import static org.junit.Assert.assertEquals;
  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.exception.SuperCsvConstraintViolationException;
  import org.supercsv.mock.IdentityTransform;
  import org.supercsv.mock.PersonBean;
  
  /**
   * Tests the UniqueHashCode constraint.
   * 
   * @author James Bassett
   */
  public class UniqueHashCodeTest {
  	
  	private CellProcessor processor;
  	private CellProcessor processorChain;
  	
  	/**
  	 * Sets up the processors for the test using all constructor combinations.
  	 */
  	@Before
  	public void setUp() {
  		processor = new UniqueHashCode();
  		processorChain = new UniqueHashCode(new IdentityTransform());
  	}
  	
  	/**
  	 * Tests unchained/chained execution with a String inputs that have different hash codes.
  	 */
  	@Test
  	public void testValidStringInput() {
  		for( String input : Arrays.asList("a", "b", "c", "d", "A", "B", "C", "D") ) {
  			assertEquals(input, processor.execute(input, ANONYMOUS_CSVCONTEXT));
  			assertEquals(input, processorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  		}
  		
  	}
  	
  	/**
  	 * Tests unchained/chained execution with a Object inputs that have different hash codes.
  	 */
  	@Test
  	public void testValidObjectInput() {
  		
  		PersonBean p1 = new PersonBean();
  		p1.setFirstName("Neo");
  		PersonBean p2 = new PersonBean();
  		p2.setFirstName("Trinity");
  		PersonBean p3 = new PersonBean();
  		p3.setFirstName("Morpheus");
  		PersonBean p4 = new PersonBean();
  		p4.setFirstName("Switch");
  		
  		for( PersonBean input : Arrays.asList(p1, p2, p3, p4) ) {
  			assertEquals(input, processor.execute(input, ANONYMOUS_CSVCONTEXT));
  			assertEquals(input, processorChain.execute(input, ANONYMOUS_CSVCONTEXT));
  		}
  		
  	}
  	
  	/**
  	 * Tests execution with String inputs that have the same hash code (should throw an Exception).
  	 */
  	@Test(expected = SuperCsvConstraintViolationException.class)
  	public void testInvalidStringInput() {
  		assertEquals("a", processor.execute("a", ANONYMOUS_CSVCONTEXT));
  		assertEquals("b", processor.execute("b", ANONYMOUS_CSVCONTEXT));
  		assertEquals("c", processor.execute("c", ANONYMOUS_CSVCONTEXT));
  		processor.execute("b", ANONYMOUS_CSVCONTEXT);
  	}
  	
  	/**
  	 * Tests execution with Object inputs that have the same hash code (should throw an Exception).
  	 */
  	@Test(expected = SuperCsvConstraintViolationException.class)
  	public void testInvalidObjectInput() {
 		
 		PersonBean p1 = new PersonBean();
 		p1.setFirstName("Neo");
 		PersonBean p2 = new PersonBean();
 		p2.setFirstName("Trinity");
 		PersonBean p3 = new PersonBean();
 		p3.setFirstName("Morpheus");
 		PersonBean p4 = new PersonBean();
 		p4.setFirstName("Neo"); // invalid! there's only one 'one'!
 		
 		assertEquals(p1, processor.execute(p1, ANONYMOUS_CSVCONTEXT));
 		assertEquals(p2, processor.execute(p2, ANONYMOUS_CSVCONTEXT));
 		assertEquals(p3, processor.execute(p3, ANONYMOUS_CSVCONTEXT));
 		processor.execute(p4, ANONYMOUS_CSVCONTEXT);
 		
 	}
 	
 	/**
 	 * Tests execution with a null input (should throw an Exception).
 	 */
 	@Test(expected = SuperCsvCellProcessorException.class)
 	public void testWithNull() {
 		processor.execute(null, ANONYMOUS_CSVCONTEXT);
 	}
 	
 }