content: package com.alibaba.fastjson2.reader;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONB;
  import com.alibaba.fastjson2.JSONFactory;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class FromIntReaderTest {
      ObjectReaderProvider provider;
  
      @BeforeEach
      public void setUp() {
          provider = JSONFactory.getDefaultObjectReaderProvider();
  
          provider.register(Bean.class, ObjectReaders.ofInt(Bean::new));
      }
  
      public void tearDown() {
          provider.unregisterObjectReader(Bean.class);
      }
  
      @Test
      public void test() {
          Bean bean = JSON.parseObject("123", Bean.class);
          assertEquals(123, bean.code);
      }
  
      @Test
      public void testJSONB() {
          Bean bean = JSONB.parseObject(JSONB.toBytes(123), Bean.class);
          assertEquals(123, bean.code);
      }
  
      public static class Bean {
          final int code;
          public Bean(int code) {
              this.code = code;
          }
      }
  }
  