content: package com.alibaba.json.bvt.bug;
  
  import java.util.HashSet;
  import java.util.Set;
  
  import junit.framework.Assert;
  import junit.framework.TestCase;
  
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.serializer.SerializerFeature;
  
  public class Bug_for_smoothrat6 extends TestCase {
  
      public void test_set() throws Exception {
          Set<Object> set = new HashSet<Object>();
          set.add(3L);
          set.add(4L);
  
          Entity entity = new Entity();
  
          entity.setValue(set);
  
          String text = JSON.toJSONString(entity, SerializerFeature.WriteClassName);
          System.out.println(text);
          Assert.assertEquals("{\"@type\":\"com.alibaba.json.bvt.bug.Bug_for_smoothrat6$Entity\",\"value\":Set[3L,4L]}",
                              text);
  
          Entity entity2 = JSON.parseObject(text, Entity.class);
          Assert.assertEquals(set, entity2.getValue());
          Assert.assertEquals(set.getClass(), entity2.getValue().getClass());
      }
      
  
      public static class Entity {
  
          private Object value;
  
          public Object getValue() {
              return value;
          }
  
          public void setValue(Object value) {
              this.value = value;
          }
      }
  }
  