content: package com.alibaba.json.bvt;
  
  import java.nio.charset.Charset;
  
  import junit.framework.Assert;
  import junit.framework.TestCase;
  
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.serializer.SerializeConfig;
  import com.alibaba.fastjson.serializer.SerializerFeature;
  
  public class CharsetFieldTest extends TestCase {
  
      public void test_codec() throws Exception {
          User user = new User();
          user.setValue(Charset.forName("UTF-8"));
  
          SerializeConfig mapping = new SerializeConfig();
          mapping.setAsmEnable(false);
          String text = JSON.toJSONString(user, mapping, SerializerFeature.WriteMapNullValue);
  
          User user1 = JSON.parseObject(text, User.class);
  
          Assert.assertEquals(user1.getValue(), user.getValue());
      }
  
      public void test_codec_null() throws Exception {
          User user = new User();
          user.setValue(null);
  
          SerializeConfig mapping = new SerializeConfig();
          mapping.setAsmEnable(false);
          String text = JSON.toJSONString(user, mapping, SerializerFeature.WriteMapNullValue);
  
          User user1 = JSON.parseObject(text, User.class);
  
          Assert.assertEquals(user1.getValue(), user.getValue());
      }
  
      public static class User {
  
          private Charset value;
  
          public Charset getValue() {
              return value;
          }
  
          public void setValue(Charset value) {
              this.value = value;
          }
  
      }
  }
  