/**
    * Copyright 2010-2012 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.common.util;
  
  import java.io.IOException;
  
  import junit.framework.Assert;
  
  import org.apache.commons.lang3.StringUtils;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class HexUtilsTest {
  
  	private static final Logger logger = LoggerFactory.getLogger(HexUtilsTest.class);
  
  	@Test
  	public void testInvalidHex() throws IOException {
  		try {
  			logger.info(HexUtils.toStringFromHex("3", "UTF-8"));
  			Assert.fail("Strings with an odd number of characters should fail");
  		} catch (IllegalArgumentException e) {
  			logger.info(e.getMessage());
  		}
  		try {
  			logger.info(HexUtils.toStringFromHex("FFA019z7AA", "UTF-8"));
  			Assert.fail("Strings with characters outside the range 0-9, a-f, and A-F should fail");
  		} catch (IllegalArgumentException e) {
  			logger.info(e.getMessage());
  		}
  	}
  
  	@Test
  	public void testRoundTripSimple() throws IOException {
  		testString("123");
  	}
  
  	@Test
  	public void testRoundTrip() throws IOException {
  		testString("𝟙𝟚𝟛");
  	}
  
  	protected void testString(String s) throws IOException {
  		String[] encodings = new String[] { "UTF-8", "UTF-16", "UTF-32" };
  		String oldString = s;
  		for (String encoding : encodings) {
  			String hex = HexUtils.toHexString(oldString, encoding);
  			logger.info("Converting '" + oldString + "' into hex using " + StringUtils.rightPad(encoding, 7, " ") + "[" + hex + "]");
  			String newString = HexUtils.toStringFromHex(hex, encoding);
  			logger.debug("originalString=" + oldString + " newString=" + newString);
  			Assert.assertEquals(oldString, newString);
  		}
  	}
  }