/*
    * 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.assertFalse;
  import static org.junit.Assert.assertNull;
  import static org.supercsv.SuperCsvTestUtils.ANONYMOUS_CSVCONTEXT;
  
  import java.text.DecimalFormat;
  import java.text.NumberFormat;
  import java.util.HashMap;
  import java.util.Locale;
  import java.util.Map;
  
  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 HashMapper processor.
   * 
   * @author Dominique De Vito
   * @author James Bassett
   */
  public class HashMapperTest {
  	
  	private static final String DEFAULT_VALUE = "Default";
  	
  	private static final Map<Object, Object> VALUE_MAP = new HashMap<Object, Object>();
  	static {
  		VALUE_MAP.put(1, "1");
  		VALUE_MAP.put(2, "2");
  		VALUE_MAP.put(3, "3");
  	}
  	
  	private CellProcessor processor;
  	private CellProcessor processor2;
  	private CellProcessor processorChain;
  	private CellProcessor processorChain2;
  	
  	/**
  	 * Sets up the processors for the test using all constructor combinations.
  	 */
  	@Before
  	public void setUp() {
  		processor = new HashMapper(VALUE_MAP);
  		processor2 = new HashMapper(VALUE_MAP, DEFAULT_VALUE);
  		processorChain = new HashMapper(VALUE_MAP, new IdentityTransform());
  		processorChain2 = new HashMapper(VALUE_MAP, DEFAULT_VALUE, new IdentityTransform());
  	}
  	
  	/**
  	 * Tests chained/unchained execution with a valid key from the map.
  	 */
  	@Test
  	public void testValidKey() {
  		int validKey = 1;
  		assertEquals("1", processor.execute(validKey, ANONYMOUS_CSVCONTEXT));
  		assertEquals("1", processor2.execute(validKey, ANONYMOUS_CSVCONTEXT));
  		assertEquals("1", processorChain.execute(validKey, ANONYMOUS_CSVCONTEXT));
  		assertEquals("1", processorChain2.execute(validKey, ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests chained/unchained execution with a key not in the map.
  	 */
  	@Test
  	public void testInvalidKey() {
  		int invalidKey = 4;
  		assertFalse(VALUE_MAP.containsKey(invalidKey));
  		
  		// no default values
  		assertNull(processor.execute(invalidKey, ANONYMOUS_CSVCONTEXT));
  		assertNull(processorChain.execute(invalidKey, ANONYMOUS_CSVCONTEXT));
  		
  		// with default values
  		assertEquals(DEFAULT_VALUE, processor2.execute(invalidKey, ANONYMOUS_CSVCONTEXT));
  		assertEquals(DEFAULT_VALUE, processorChain2.execute(invalidKey, ANONYMOUS_CSVCONTEXT));
  	}
  	
  	/**
  	 * Tests that other kinds of processors (e.g. LongCellProcessors) can be chained to HashMapper.
  	 */
 	@Test
 	public void testChainedToLongCellProcessor() {
 		final String input = "one million";
 		final Map<Object, Object> map = new HashMap<Object, Object>();
 		map.put(input, 1000000);
 		final DecimalFormat format = (DecimalFormat) NumberFormat.getNumberInstance(Locale.UK);
 		format.applyPattern("###,###,###");
 		
 		final CellProcessor p = new HashMapper(map, new FmtNumber(format));
 		assertEquals("1,000,000", 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 construction with a null Map (should throw an Exception).
 	 */
 	@Test(expected = NullPointerException.class)
 	public void testConstructionWithNullMap() {
 		new HashMapper(null, DEFAULT_VALUE);
 	}
 	
 	/**
 	 * Tests chained execution with a null Map (should throw an Exception).
 	 */
 	@Test(expected = NullPointerException.class)
 	public void testChainedConstructionWithNullMap() {
 		new HashMapper(null, DEFAULT_VALUE, new IdentityTransform());
 	}
 	
 	/**
 	 * Tests construction with an empty Map (should throw an Exception).
 	 */
 	@Test(expected = IllegalArgumentException.class)
 	public void testConstructionWithEmptyMap() {
 		new HashMapper(new HashMap<Object, Object>(), DEFAULT_VALUE);
 	}
 	
 	/**
 	 * Tests chained execution with an empty Map (should throw an Exception).
 	 */
 	@Test(expected = IllegalArgumentException.class)
 	public void testChainedConstructionWithEmptyMap() {
 		new HashMapper(new HashMap<Object, Object>(), DEFAULT_VALUE, new IdentityTransform());
 	}
 	
 }