Update unit test

Src/Asp.Net/MySqlTest/UnitTest/UCustom015.cs

@@ -59,6 +59,7 @@ namespace OrmTest
               .Includes(x => x.Provinces.OrderByDescending(x111 => x111.Id).ToList())
               .ToList();
             db.CodeFirst.InitTables<SysTimer>();
+            db.DbMaintenance.TruncateTable<SysTimer>();
             db.Insertable(new SysTimer()
             {
                  CreatedTime=DateTime.Now,

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

@@ -1,4 +1,5 @@
-using System;
+using SqlSugar;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -17,6 +18,7 @@ namespace OrmTest
             var list = Db.Queryable<UnitJsonTest>().ToList();
             UValidate.Check("order1", list.First().Order.Name, "Json");
             Db.Updateable(new UnitJsonTest() { Id = 1, Order = new Order { Id = 2, Name = "order2" } }).ExecuteCommand();
+            var json = Db.Queryable<UnitJsonTest>().Select(it => SqlFunc.JsonField(it.Order, "Name")).ToList();
             list = Db.Queryable<UnitJsonTest>().ToList();
             UValidate.Check("order2", list.First().Order.Name, "Json");