Add user test case

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs

@@ -33,6 +33,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UnitAsyncToken.Init();
             UnitManyToMany121231.Init();
             UnitFilteradfa.Init();
             UnitWeek.Init();

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitAsyncToken.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest
+{
+    internal class UnitAsyncToken
+    {
+        public static void Init() 
+        {
+            var db = NewUnitTest.Db;
+            db.CodeFirst.InitTables<Order>();
+            if (db.Queryable<Order>().Count() < 10) 
+            {
+                for(int i = 0; i < 10; i++)
+                {
+                    db.Insertable(new Order() { Name = "a" + i , CreateTime=DateTime.Now }).ExecuteCommand();
+                }
+            }
+
+            var x0 = db.Queryable<Order>().Take(10).ToList();
+
+            var x1 = db.Queryable<Order>().Take(10).ToListAsync().GetAwaiter().GetResult();
+
+            var x2 = db.Queryable<Order>().Take(10).ToListAsync(new System.Threading.CancellationToken()).GetAwaiter().GetResult();
+
+            var r1 = db.Utilities.SerializeObject(x0);
+            var r2 = db.Utilities.SerializeObject(x1);
+            var r3 = db.Utilities.SerializeObject(x2);
+            if (r1 !=r2 || r1!=r3)
+            {
+                throw new Exception("UnitAsyncToken");
+            }
+        }
+    }
+}