diff --git a/__test__/FileSystem/__snapshots__/file.test.ts.snap b/__test__/FileSystem/__snapshots__/file.test.ts.snap
new file mode 100644
index 000000000..538076267
--- /dev/null
+++ b/__test__/FileSystem/__snapshots__/file.test.ts.snap
@@ -0,0 +1,21 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`changev 1`] = `"[1,[\\"BlockTableRecord\\",1,0,1,[\\"Line\\",1,1,1,[2,3,4],[0,0,0]]]]"`;
+
+exports[`测试创建 1`] = `"[1,-1,1,[]]"`;
+
+exports[`测试创建 2`] = `"[1,-1,0]"`;
+
+exports[`测试创建 3`] = `"[1,null,0]"`;
+
+exports[`测试创建 4`] = `"[1,[]]"`;
+
+exports[`测试创建 5`] = `"[1,\\"\\",\\"\\",\\"\\"]"`;
+
+exports[`测试创建 6`] = `"[1,-1,1,[0,0,0],[0,0,0]]"`;
+
+exports[`测试创建 7`] = `"[1,\\"\\",\\"\\",\\"\\"]"`;
+
+exports[`测试创建 8`] = `"[1,null]"`;
+
+exports[`测试创建 9`] = `"[1,-1]"`;
diff --git a/__test__/FileSystem/file.test.ts b/__test__/FileSystem/file.test.ts
index cc8fb7942..a7728bdea 100644
--- a/__test__/FileSystem/file.test.ts
+++ b/__test__/FileSystem/file.test.ts
@@ -1,5 +1,4 @@
 import { Vector3 } from 'three';
-
 import
 {
     AllObjectData,
@@ -13,37 +12,68 @@ import
     Line,
     ObjectAllDataHistoryRecord,
     RemoveObjectData,
+    CADObject,
 } from '../../src/DatabaseServices/FileSystem';
 
+function CadObjectToString(obj: CADObject)
+{
+    let file = new CADFile();
+    obj.WriteFile(file);
+    return file.ToString();
+}
+
+test('测试创建', () =>
+{
+    for (let C of [AllObjectData,
+        BlockTableRecord,
+        CommandHistoryRecord,
+        CreateObjectData,
+        HistorycRecord,
+        Line,
+        ObjectAllDataHistoryRecord,
+        RemoveObjectData,
+        CADObject])
+    {
+        //确保每个对象都被正确的创建
+        let obj = CADFactory.CreateObject(C.name /*?*/);
+        let str = CadObjectToString(obj);
+        expect(str).toMatchSnapshot();
+
+        //确保对象正确的反序列化
+        let fileNew = new CADFile();
+        fileNew.Data = JSON.parse(str);
+
+        let objNew = CADFactory.CreateObject(C.name);
+        let str2 = CadObjectToString(objNew);
+
+        //确保反序列化之后的数据是正确的
+        expect(str).toBe(str2);
+    }
+});
+
+
 test('id分配', () =>
 {
     let db = new Database();
     let line = new Line();
-    line.StartPoint = new Vector3(10, 3, 2);
+
+    //对象添加到模型空间 分配id
     let id = db.ModelSpace.Append(line);
 
-    expect(id != undefined).toBeTruthy();
-    expect(id.Object === line).toBeTruthy();
+    expect(id != undefined).toBeTruthy();//对象已经被创建,所以id被分配
+    expect(id.Object === line).toBeTruthy();//对象id指向对象
 
+    //撤销添加
     db.hm.Undo();
 
-    expect(id.IsErase).toBeTruthy();
-    expect(db.ModelSpace.Cout()).toBe(0);
+    expect(id.IsErase).toBeTruthy();  //对象已经被删除
+    expect(db.ModelSpace.Cout()).toBe(0);  //个数应该为0
 
+    //还原对象
     db.hm.Redo();
 
-    expect(db.ModelSpace.Cout()).toBe(1);
-    expect(!id.IsErase).toBeTruthy();
-    let file = db.FileWrite();
-
-    let db2 = new Database();
-    db2.FileRead(file);
-
-    console.log(db2.GetObjectId(0));
-
-    db2.GetObjectId(0).Object.ClassName //?
-    console.log(db2.ModelSpace.Cout());
-    console.log(file);
+    expect(db.ModelSpace.Cout()).toBe(1);  //对象还原
+    expect(!id.IsErase).toBeTruthy();  //id指向的对象不被删除
 });
 
 
@@ -58,12 +88,12 @@ test('changev', () =>
     db.hm.Undo();
     db.hm.Redo();
 
-    console.log(id.Object === l1);
+    expect(id.Object !== l1).toBeTruthy(); //创建对象的撤销和重做后 id指向了新的实体
 
     (id.Object as Line).StartPoint = new Vector3(2, 3, 4);
-
     let file = db.FileWrite();
-    console.log(file.ToString());
+
+    expect(file.ToString()/*?*/).toMatchSnapshot();
 });
 
 test('xxx', () =>
@@ -96,58 +126,19 @@ test('xxx', () =>
     (id1.Object as Line).StartPoint = new Vector3(100, 300, 400);
     (id1.Object as Line).EndPoint = new Vector3(2000, 3000, 4000);
 
-    console.log((id1.Object as Line).StartPoint);
-    console.log((id1.Object as Line).EndPoint);
 
     db.hm.Undo();
 
-    console.log((id1.Object as Line).StartPoint);
-    console.log((id1.Object as Line).EndPoint);
-
     db.hm.Redo();
 
-    console.log((id1.Object as Line).StartPoint);
-    console.log((id1.Object as Line).EndPoint);
-
-
     let f = new CADFile();
     db.hm.WriteFile(f);
 
-    f.ToString() //?
-
     let db2 = new Database();
     db2.hm.ReadFile(f);
 
     let f3 = new CADFile();
     db2.hm.WriteFile(f3);
 
-    f3.ToString() //?
+    expect(f3.ToString()).toBe(f.ToString());//对象序列化反序列化后 数据应该一样
 });
-
-let l = CADFactory.CreateObject("Line");
-
-l.ClassName //?
-
-l.constructor.name //?
-
-// function createLine()
-// {
-//     for (let i = 0; i < 5000; i++)
-//     {
-//         let l = CADFactory.CreateObject("Line") as Line;
-//     }
-// }
-
-// // createLine(); //?.
-
-
-// function undoRedo()
-// {
-//     for (let i = 0; i < 5000; i++)
-//     {
-//         db.hm.Undo();
-//         db.hm.Redo();
-//     }
-// }
-
-// // undoRedo(); //?.
diff --git a/src/DatabaseServices/FileSystem.ts b/src/DatabaseServices/FileSystem.ts
index bc19bb077..56a7e9882 100644
--- a/src/DatabaseServices/FileSystem.ts
+++ b/src/DatabaseServices/FileSystem.ts
@@ -4,19 +4,14 @@ import { Vector3, Line3 } from 'three';
 关于webCAD 文件系统的原型.
 包括了对象的保存,撤销,还原.
 
-对象的绘制 更新.
-
 对象ID更新 引用
 
-材质字典
-
 关于对象的撤销和重做设计.
 
 对象池
 
 增量保存
 
-
 1.应该能够新增和删除图元.
 2.新增删除图元应该是可以撤销和重做的.
 3.图元更改是可以撤销和重做的.
@@ -31,7 +26,6 @@ db.AppendEntity(ent);
 当我们删除对象时,尝试只对对象进行标记删除.
 当历史记录被优化时,我们尝试对删除的对象进行彻底删除
 
-
 ###关于对象的历史记录信息
 
 ->对象创建
@@ -115,7 +109,6 @@ id只有在一个情况下才会更新.跨文档复制时.
 
 */
 
-
 //CAD对象工厂,通过注册 和暴露的创建方法,动态创建对象
 export class CADFactory
 {
@@ -133,6 +126,7 @@ export class CADFactory
     }
 }
 
+//可以通过添加装饰器 在类前面(@Factory),自动注册工厂的序列化
 export function Factory(target: Object)
 {
     CADFactory.RegisterObject(target);