Add unit test

Src/Asp.Net/MySqlTest/UnitTest/UJson.cs

@@ -57,7 +57,29 @@ namespace OrmTest
             {
                 throw new Exception("unit test");
             }
+            db.CodeFirst.InitTables<OrderMain11, OrderAarray11>();
+            var id=db.Insertable(new OrderMain11() { Name = "a" }).ExecuteReturnIdentity();
+            db.Insertable(new OrderAarray11() { fk=id, Json =  new int[] { 1} }).ExecuteCommand();
+            var list31 = db.Queryable<OrderAarray11>().ToList();
+            var list3=db.Queryable<OrderMain11>().LeftJoin<OrderAarray11>((t1, ti2) => t1.Id == ti2.fk)
+                .Select((t1, ti2) => new { t1.Id, t1.Name,json= ti2.Json }).ToList();
         }
+        public class OrderMain11
+        {
+            [SugarColumn(IsPrimaryKey = true,IsIdentity =true)]
+            public int Id { get; set; }
+
+            public string Name { get; set; }
+        }
+        public class OrderAarray11 
+        {
+            [SugarColumn(IsPrimaryKey =true, IsIdentity = true)]
+            public int Id { get; set; }
+            public int fk { get; set; }
+            [SugarColumn(IsJson =true)]
+            public int[] Json { get; set; }
+        }
+
 
         public class UnitJsonArray
         {