content: package com.alibaba.fastjson2.autoType;
  
  import com.alibaba.fastjson2.JSONB;
  import com.alibaba.fastjson2.JSONReader;
  import com.alibaba.fastjson2.JSONWriter;
  import org.junit.jupiter.api.Test;
  
  import java.util.List;
  import java.util.Map;
  import java.util.TreeMap;
  
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  public class AutoTypeTest25 {
      @Test
      public void test_1() throws Exception {
          Bean1 bean = new Bean1();
          bean.items = new TreeMap<>();
          bean.items.put("a", new Item());
  
          byte[] bytes = JSONB.toBytes(bean,
                  JSONWriter.Feature.WriteClassName,
                  JSONWriter.Feature.FieldBased,
                  JSONWriter.Feature.ReferenceDetection,
                  JSONWriter.Feature.WriteNulls,
                  JSONWriter.Feature.NotWriteDefaultValue
          );
  
          JSONB.dump(bytes);
  
          Bean1 bean2 = (Bean1) JSONB.parseObject(bytes, Object.class, JSONReader.Feature.SupportAutoType, JSONReader.Feature.FieldBased);
          assertNotNull(bean2);
          assertNotNull(bean2.items);
  
          assertSame(bean.items.getClass(), bean2.items.getClass());
          assertSame(bean.items.size(), bean2.items.size());
          assertSame(bean.items.get("a").getClass(), bean2.items.get("a").getClass());
          assertSame(bean.items.get("a").id, bean2.items.get("a").id);
      }
  
      public static class Bean1 {
          Map<String, Item> items;
      }
  
      public static class Item {
          public int id;
          public long v1;
          public boolean val;
          public Integer value1;
          public Long value2;
          public String value3;
          public Boolean value4;
          Child child;
          List<Child> chilren;
          Child[] a1;
      }
  
      public static class Child {
      }
  }
  