content: package com.alibaba.fastjson2.issues;
  
  import com.alibaba.fastjson2.JSON;
  import org.junit.jupiter.api.Test;
  
  import java.util.Collection;
  import java.util.Set;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class Issue513 {
      @Test
      public void test() {
          Set set = (Set) JSON.parse("Set[\"1541357098843803649\"]");
          assertEquals(1, set.size());
          assertTrue(set.contains("1541357098843803649"));
      }
  
      @Test
      public void test1() {
          Bean bean = JSON.parseObject("{\"values\":Set[\"1541357098843803649\"]}", Bean.class);
          Set set = (Set) bean.values;
          assertEquals(1, set.size());
          assertTrue(set.contains("1541357098843803649"));
      }
  
      public static class Bean {
          public Object values;
      }
  
      @Test
      public void test2() {
          Bean1 bean = JSON.parseObject("{\"values\":Set[\"1541357098843803649\"]}", Bean1.class);
          Set set = (Set) bean.values;
          assertEquals(1, set.size());
          assertTrue(set.contains("1541357098843803649"));
      }
  
      public static class Bean1 {
          public Collection values;
      }
  
      @Test
      public void test3() {
          Bean3 bean = JSON.parseObject("{\"values\":Set[\"1541357098843803649\"]}", Bean3.class);
          Set set = (Set) bean.values;
          assertEquals(1, set.size());
          assertTrue(set.contains("1541357098843803649"));
      }
  
      public static class Bean3 {
          private Collection values;
  
          public Collection getValues() {
              return values;
          }
  
          public void setValues(Collection values) {
              this.values = values;
          }
      }
  }
  