add testcase for issue #798

core/src/test/java/com/alibaba/fastjson2/issues/Issue798.java

@@ -0,0 +1,26 @@
+package com.alibaba.fastjson2.issues;
+
+import com.alibaba.fastjson2.JSON;
+import lombok.Data;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class Issue798 {
+    @Test
+    public void test() {
+        Config config = new Config();
+        assertEquals("{}", JSON.toJSONString(config));
+    }
+
+    @Data
+    public static class Config {
+        public String[] deviceCodes;
+        public String barkPushUrl;
+        public String barkPushToken;
+        public String location;
+        public List<String> storeNameWhiteList;
+    }
+}