Add unit test

Src/Asp.NetCore2/DmOrmTest/UnitTest/UnitInsert.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OrmTest
+{
+    internal class UnitInsert
+    {
+        public static void Init() 
+        {
+            var db = NewUnitTest.Db;
+            db.CodeFirst.InitTables<Unitadfa>();
+            db.Insertable(new Unitadfa()
+            {
+                Name = "A",
+                 Date = DateTime.Now,
+            }).ExecuteCommand();
+            db.Insertable(new List<Unitadfa>() {
+            new Unitadfa()
+            {
+                Name = "A",
+                Date = DateTime.Now,
+            },
+            new Unitadfa()
+            {
+                Name = "A",
+                Date = DateTime.Now,
+            }}).ExecuteCommand();
+            var list=db.Queryable<Unitadfa>().ToList();
+            db.DbMaintenance.TruncateTable<Unitadfa>();
+            db.Fastest<Unitadfa>().OffIdentity().BulkCopy(list);
+          
+            db.DbMaintenance.DropTable<Unitadfa>();
+
+        }
+    }
+    public class Unitadfa 
+    {
+        [SqlSugar.SugarColumn(IsIdentity =true,IsPrimaryKey =true)]
+        public int Id { get; set; }
+
+        public string Name { get; set; }
+        [SqlSugar.SugarColumn(ColumnDataType ="Date")]
+        public DateTime Date { get; set; }
+    }
+}