Add unit test

Src/Asp.Net/SqlServerTest/SqlServerTest.csproj

@@ -97,6 +97,7 @@
     <Compile Include="Models\OrderItem.cs" />
     <Compile Include="Demo\Demo0_SqlSugarClient.cs" />
     <Compile Include="Models\ViewOrder.cs" />
+    <Compile Include="UnitTest\UnitUpdateNavN3.cs" />
     <Compile Include="UnitTest\UnitOneToOne12.cs" />
     <Compile Include="UnitTest\Models\poetry_video_comment.cs" />
     <Compile Include="UnitTest\Models\user_name_simple.cs" />

Src/Asp.Net/SqlServerTest/UnitTest/Main.cs

@@ -31,6 +31,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UnitUpdateNavN3.Init();
             UnitOneToOne12.Init();
             UnitInsertNav3.Init();
             UnitInsertNav2.Init();

Src/Asp.Net/SqlServerTest/UnitTest/UnitUpdateNavN3.cs

@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SqlSugar;
+
+namespace OrmTest 
+{
+    public class UnitUpdateNavN3
+    {
+        public static void Init() 
+        {
+            var db = NewUnitTest.Db;
+
+            db.CodeFirst.InitTables(typeof(ClassA), typeof(ClassB), typeof(ClassC));
+            db.DbMaintenance.TruncateTable<ClassA,ClassB,ClassC>();
+
+
+            //初始化数据 1对多-1对多 共三层
+            ClassA a = new ClassA();
+            a.AId = "a";
+
+            ClassB b = new ClassB();
+            b.BId = "b";
+            b.AId = a.AId;
+            a.B = new List<ClassB>();
+            a.B.Add(b);
+
+            ClassC c = new ClassC();
+            c.CId = "c";
+            c.BId = b.BId;
+            b.C = new List<ClassC>();
+            b.C.Add(c);
+
+            //导航插入三表数据
+            db.InsertNav(a).Include(t => t.B).ThenInclude(t => t.C).ExecuteCommand();
+
+            //修改数据 修改b表id 修改c表对应b表id
+            b.BId = "bb";
+            c.BId = "bb";
+            c.CId = "cc";
+            
+
+            //导航更新三表数据
+            db.UpdateNav(a).Include(t => t.B).ThenInclude(t => t.C).ExecuteCommand();
+
+            //正常情况C数据库中应该只有1条 如果是多条则说明三级表数据存在垃圾数据
+            var count = db.Queryable<ClassC>().ToList();
+
+
+            //清空表中数据
+            db.DbMaintenance.DropTable("ClassA");
+            db.DbMaintenance.DropTable("ClassB");
+            db.DbMaintenance.DropTable("ClassC"); 
+            Console.WriteLine($"第三级表中总数据条数：{count}");
+        }
+        /// <summary>
+        /// 一级类
+        /// </summary>
+        [SugarTable("tb_a")]
+        public class ClassA
+        {
+            [SugarColumn(IsPrimaryKey = true)]
+            public string AId { get; set; }
+            [Navigate(NavigateType.OneToMany, nameof(ClassB.AId))]
+            public List<ClassB> B { get; set; }
+            [SugarColumn(IsNullable = true)]
+            public DateTime? UpdateTime { get; set; }
+        }
+        /// <summary>
+        /// 二级类
+        /// </summary>
+        [SugarTable("tb_b")]
+        public class ClassB
+        {
+            [SugarColumn(IsPrimaryKey = true)]
+            public string BId { get; set; }
+            public string AId { get; set; }
+            [Navigate(NavigateType.OneToMany, nameof(ClassC.BId))]
+            public List<ClassC> C { get; set; }
+        }
+        /// <summary>
+        /// 三级类
+        /// </summary>
+        [SugarTable("tb_c")]
+        public class ClassC
+        {
+            [SugarColumn(IsPrimaryKey = true)]
+            public string CId { get; set; }
+
+            public string BId { get; set; }
+        }
+    }
+}