content: package com.alibaba.fastjson2;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.HashMap;
  import java.util.LinkedHashMap;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  public class CopyToTest {
      @Test
      public void testNull() {
          assertNull(JSON.copyTo(null, HashMap.class));
          assertNull(JSON.copyTo(null, HashMap.class, JSONWriter.Feature.FieldBased));
          assertNull(JSON.copyTo(null, HashMap.class, JSONWriter.Feature.BeanToArray));
          assertNull(JSON.copyTo(null, HashMap.class, JSONWriter.Feature.BeanToArray, JSONWriter.Feature.FieldBased, JSONWriter.Feature.ReferenceDetection));
      }
  
      @Test
      public void test() {
          JSONObject object = JSONObject.of("id", 101);
  
          LinkedHashMap map = JSON.copyTo(object, LinkedHashMap.class);
          assertEquals(map.get("id"), object.get("id"));
  
          LinkedHashMap map1 = JSON.copyTo(object, LinkedHashMap.class, JSONWriter.Feature.BeanToArray);
          assertEquals(map1.get("id"), object.get("id"));
      }
  }
  