content: package com.alibaba.fastjson2.fieldbased;
  
  import com.alibaba.fastjson2.*;
  import com.alibaba.fastjson2.reader.ObjectReader;
  import com.alibaba.fastjson2.reader.ObjectReaderCreator;
  import com.alibaba.fastjson2.writer.ObjectWriter;
  import com.alibaba.fastjson2.writer.ObjectWriterCreator;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class FieldBasedTest {
      @Test
      public void test_0() {
          ObjectWriterCreator writerCreator = ObjectWriterCreator.INSTANCE;
          ObjectReaderCreator readerCreator = ObjectReaderCreator.INSTANCE;
  
          A a = new A();
          a.id = 101;
  
          ObjectWriter<A> objectWriter = writerCreator.createObjectWriter(A.class, JSONWriter.Feature.FieldBased.mask, JSONFactory.getDefaultObjectWriterProvider());
          JSONWriter jsonWriter = JSONWriter.of();
          objectWriter.write(jsonWriter, a);
  
          String json = jsonWriter.toString();
          assertEquals("{\"id\":101}", json);
  
          ObjectReader<A> objectReader = readerCreator.createObjectReader(A.class, true);
          A a1 = objectReader.readObject(JSONReader.of(json), 0);
          assertEquals(a.id, a1.id);
      }
  
      @Test
      public void test_1() {
          A a = new A();
          a.id = 101;
  
          String json = JSON.toJSONString(a, JSONWriter.Feature.FieldBased);
          assertEquals("{\"id\":101}", json);
  
          A a1 = JSON.parseObject(json, A.class, JSONReader.Feature.FieldBased);
          assertEquals(a.id, a1.id);
      }
  
      @Test
      public void test_1_jsonb() {
          A a = new A();
          a.id = 101;
  
          byte[] jsonbBytes = JSONB.toBytes(a, JSONWriter.Feature.FieldBased);
          assertEquals("{\"id\":101}", JSONB.parseObject(jsonbBytes).toString());
  
          A a1 = JSONB.parseObject(jsonbBytes, A.class, JSONReader.Feature.FieldBased);
          assertEquals(a.id, a1.id);
      }
  
      static class A {
          private int id;
      }
  }
  