package com.alibaba.json.bvt.bug; import java.util.concurrent.TimeUnit; import junit.framework.TestCase; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.serializer.SerializerFeature; public class Bug_for_chengchao extends TestCase { public void test_0() throws Exception { SerializerFeature[] features = { SerializerFeature.WriteMapNullValue, SerializerFeature.WriteEnumUsingToString, SerializerFeature.SortField }; Entity entity = new Entity(); JSON.toJSONString(entity, features); } private static class Entity { private TimeUnit unit; public TimeUnit getUnit() { return unit; } public void setUnit(TimeUnit unit) { this.unit = unit; } } }