/*
    * 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.fail;
  import static org.supercsv.SuperCsvTestUtils.ANONYMOUS_CSVCONTEXT;
  import static org.supercsv.SuperCsvTestUtils.assertExecution;
  
  import java.math.BigDecimal;
  import java.text.DecimalFormatSymbols;
  import java.util.Arrays;
  import java.util.Locale;
  
  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 ParseBigDecimal processor.
   * 
   * @author Kasper B. Graversen
   * @author James Bassett
   */
  public class ParseBigDecimalTest {
  	
  	private static final DecimalFormatSymbols ENGLISH_SYMBOLS = new DecimalFormatSymbols(Locale.ENGLISH);
  	private static final DecimalFormatSymbols GERMAN_SYMBOLS = new DecimalFormatSymbols(Locale.GERMANY);
  	
  	private CellProcessor processor;
  	private CellProcessor processor2;
  	private CellProcessor processor3;
  	private CellProcessor processorChain;
  	private CellProcessor processorChain2;
  	private CellProcessor processorChain3;
  	
  	/**
  	 * Sets up the processors for the test using all constructor combinations.
  	 */
  	@Before
  	public void setUp() {
  		processor = new ParseBigDecimal();
  		processor2 = new ParseBigDecimal(ENGLISH_SYMBOLS);
  		processor3 = new ParseBigDecimal(GERMAN_SYMBOLS);
  		processorChain = new ParseBigDecimal(new IdentityTransform());
  		processorChain2 = new ParseBigDecimal(ENGLISH_SYMBOLS, new IdentityTransform());
  		processorChain3 = new ParseBigDecimal(GERMAN_SYMBOLS, new IdentityTransform());
  	}
  	
  	/**
  	 * Test unchained/chained execution with a valid positive input.
  	 */
  	@Test
  	public void testValidInput() {
  		
  		String normalInput = "1357.459";
  		String germanInput = "1357,459";
  		BigDecimal expectedOutput = new BigDecimal(normalInput);
  		
  		// normal input
  		for( final CellProcessor p : Arrays.asList(processor, processor2, processorChain, processorChain2) ) {
  			assertExecution(p, normalInput, expectedOutput);
  		}
  		
  		// german input ("," instead of "." as decimal symbol)
  		for( final CellProcessor p : Arrays.asList(processor3, processorChain3) ) {
  			assertExecution(p, germanInput, expectedOutput);
  		}
  	}
  	
  	/**
  	 * Test unchained/chained execution with a valid negative input.
  	 */
  	@Test
  	public void testValidNegativeInput() {
  		
  		String normalInput = "-1357.459";
  		String germanInput = "-1357,459";
  		BigDecimal expectedOutput = new BigDecimal(normalInput);
  		
  		// normal input
  		for( final CellProcessor p : Arrays.asList(processor, processor2, processorChain, processorChain2) ) {
  			assertExecution(p, normalInput, expectedOutput);
  		}
  		
 		// german input ("," instead of "." as decimal symbol)
 		for( final CellProcessor p : Arrays.asList(processor3, processorChain3) ) {
 			assertExecution(p, germanInput, expectedOutput);
 		}
 	}
 	
 	/**
 	 * Tests that grouping separators are handled correctly for positive numbers.
 	 */
 	@Test
 	public void testValidInputWithGroupingSeparator() {
 		String normalInput = "1,357.459";
 		String germanInput = "1.357,459";
 		BigDecimal expectedOutput = new BigDecimal("1357.459");
 		
 		// 'no symbols' processors should choke on grouping separators
 		for( CellProcessor p : Arrays.asList(processor, processorChain) ) {
 			try {
 				p.execute(normalInput, ANONYMOUS_CSVCONTEXT);
 				fail("should have thrown SuperCsvCellProcessorException");
 			}
 			catch(SuperCsvCellProcessorException e) {}
 		}
 		
 		// normal input
 		for( final CellProcessor p : Arrays.asList(processor2, processorChain2) ) {
 			assertExecution(p, normalInput, expectedOutput);
 		}
 		
 		// german input (opposite - "," is decimal symbol and "." is grouping)
 		for( final CellProcessor p : Arrays.asList(processor3, processorChain3) ) {
 			assertExecution(p, germanInput, expectedOutput);
 		}
 	}
 	
 	/**
 	 * Tests that grouping separators are handled correctly for negative numbers.
 	 */
 	@Test
 	public void testValidNegativeInputWithGroupingSeparator() {
 		String normalInput = "-1,357.459";
 		String germanInput = "-1.357,459";
 		BigDecimal expectedOutput = new BigDecimal("-1357.459");
 		
 		// 'no symbols' processors should choke on grouping separators
 		for( CellProcessor p : Arrays.asList(processor, processorChain) ) {
 			try {
 				p.execute(normalInput, ANONYMOUS_CSVCONTEXT);
 				fail("should have thrown SuperCsvCellProcessorException");
 			}
 			catch(SuperCsvCellProcessorException e) {}
 		}
 		
 		// normal input
 		for( final CellProcessor p : Arrays.asList(processor2, processorChain2) ) {
 			assertExecution(p, normalInput, expectedOutput);
 		}
 		
 		// german input (opposite - "," is decimal symbol and "." is grouping)
 		for( final CellProcessor p : Arrays.asList(processor3, processorChain3) ) {
 			assertExecution(p, germanInput, expectedOutput);
 		}
 	}
 	
 	/**
 	 * Tests execution with a non-String input (should throw an exception).
 	 */
 	@Test(expected = SuperCsvCellProcessorException.class)
 	public void testWithNonString() {
 		processor.execute(1234, 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 execution with an empty-String input (should throw an Exception).
 	 */
 	@Test(expected = SuperCsvCellProcessorException.class)
 	public void testWithEmptyString() {
 		processor.execute("", ANONYMOUS_CSVCONTEXT);
 	}
 	
 	/**
 	 * Tests construction with null symbols (should throw an Exception).
 	 */
 	@Test(expected = NullPointerException.class)
 	public void testWithNullSymbols() {
 		new ParseBigDecimal((DecimalFormatSymbols) null);
 	}
 	
 }