content: package com.alibaba.json.bvt.parser;
  
  import junit.framework.Assert;
  import junit.framework.TestCase;
  
  
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.JSONObject;
  import com.alibaba.fastjson.util.ThreadLocalCache;
  
  public class TestUTF8_2 extends TestCase {
  
      public void test_utf_1() throws Exception {
          String content = new String(decodeHex("F0A4ADA2".toCharArray()), "UTF-8");
          JSONObject json = new JSONObject();
          json.put("content", content);
          JSONObject obj = (JSONObject) JSON.parse(json.toJSONString().getBytes("UTF-8"));
          Assert.assertEquals(1, obj.size());
          Assert.assertEquals(content, obj.get("content"));
      }
  
      public void test_utf_2() throws Exception {
          String content = new String(decodeHex("E282AC".toCharArray()), "UTF-8");
          JSONObject json = new JSONObject();
          json.put("content", content);
          JSONObject obj = (JSONObject) JSON.parse(json.toJSONString().getBytes("UTF-8"));
          Assert.assertEquals(1, obj.size());
          Assert.assertEquals(content, obj.get("content"));
      }
  
      public void test_utf_3() throws Exception {
          byte[] bytes = decodeHex("C2A2".toCharArray());
          String content = new String(bytes, "UTF-8");
          JSONObject json = new JSONObject();
          json.put("content", content);
          JSONObject obj = (JSONObject) JSON.parse(json.toJSONString().getBytes("UTF-8"));
          Assert.assertEquals(1, obj.size());
          Assert.assertEquals(content, obj.get("content"));
      }
      
      public void test_utf_4() throws Exception {
          ThreadLocalCache.clearChars();
          
          byte[] bytes = decodeHex("C2FF".toCharArray());
          String content = new String(bytes, "UTF-8");
          JSONObject json = new JSONObject();
          json.put("content", content);
          JSONObject obj = (JSONObject) JSON.parse(json.toJSONString().getBytes("UTF-8"));
          Assert.assertEquals(1, obj.size());
          Assert.assertEquals(content, obj.get("content"));
      }
      
      public static byte[] decodeHex(char[] data) throws Exception {
  
          int len = data.length;
  
          if ((len & 0x01) != 0) {
              throw new Exception("Odd number of characters.");
          }
  
          byte[] out = new byte[len >> 1];
  
          // two characters form the hex value.
          for (int i = 0, j = 0; j < len; i++) {
              int f = toDigit(data[j], j) << 4;
              j++;
              f = f | toDigit(data[j], j);
              j++;
              out[i] = (byte) (f & 0xFF);
          }
  
          return out;
      }
      
      protected static int toDigit(char ch, int index) throws Exception {
          int digit = Character.digit(ch, 16);
          if (digit == -1) {
              throw new Exception("Illegal hexadecimal character " + ch + " at index " + index);
          }
          return digit;
      }
  }
  