diff --git a/packages/designer/package.json b/packages/designer/package.json
index ce9cab977..aec62d154 100644
--- a/packages/designer/package.json
+++ b/packages/designer/package.json
@@ -10,7 +10,8 @@
   ],
   "scripts": {
     "build": "build-scripts build --skip-demo",
-    "test": "build-scripts test --config build.test.json"
+    "test": "build-scripts test --config build.test.json",
+    "test:cov": "build-scripts test --config build.test.json --jest-coverage"
   },
   "license": "MIT",
   "dependencies": {
diff --git a/packages/designer/src/document/document-model.ts b/packages/designer/src/document/document-model.ts
index c493da22d..76124a1df 100644
--- a/packages/designer/src/document/document-model.ts
+++ b/packages/designer/src/document/document-model.ts
@@ -407,7 +407,7 @@ export class DocumentModel {
    * 是否已修改
    */
   isModified() {
-    return !this.history.isSavePoint();
+    return this.history.isSavePoint();
   }
 
   // FIXME: does needed?
diff --git a/packages/designer/src/document/history.ts b/packages/designer/src/document/history.ts
index ef25dfb92..a27e180b9 100644
--- a/packages/designer/src/document/history.ts
+++ b/packages/designer/src/document/history.ts
@@ -185,9 +185,14 @@ export class History {
     this.emitter.removeAllListeners();
     this.records = [];
   }
-
+  /**
+   *
+   * @deprecated
+   * @returns
+   * @memberof History
+   */
   isModified() {
-    return this.point !== this.session.cursor;
+    return this.isSavePoint();
   }
 }
 
diff --git a/packages/designer/src/project/project.ts b/packages/designer/src/project/project.ts
index 0101c5066..6d5a09cf8 100644
--- a/packages/designer/src/project/project.ts
+++ b/packages/designer/src/project/project.ts
@@ -58,7 +58,7 @@ export class Project {
       // TODO: future change this filter
       componentsMap: this.currentDocument?.getComponentsMap(),
       componentsTree: this.documents.filter((doc) => !doc.isBlank()).map((doc) => doc.schema),
-      i18n: this._i18n || {},
+      i18n: this.i18n,
     };
   }
 
@@ -99,6 +99,7 @@ export class Project {
         const documentInstances = this.data.componentsTree.map((data) => this.createDocument(data));
         // TODO: 暂时先读 config tabBar 里的值，后面看整个 layout 结构是否能作为引擎规范
         if (this.config?.layout?.props?.tabBar?.items?.length > 0) {
+          // slice(1)这个贼不雅，默认任务fileName 是类'/fileName'的形式
           documentInstances.find((i) => i.fileName === this.config.layout.props.tabBar.items[0].path?.slice(1))?.open();
         } else {
           documentInstances[0].open();
@@ -222,13 +223,14 @@ export class Project {
       return null;
     } else if (isDocumentModel(doc)) {
       return doc.open();
-    } else if (isPageSchema(doc)) {
+    }
+    //  else if (isPageSchema(doc)) {
       // 暂时注释掉，影响了 diff 功能
       // const foundDoc = this.documents.find(curDoc => curDoc?.rootNode?.id && curDoc?.rootNode?.id === doc?.id);
       // if (foundDoc) {
       //   foundDoc.remove();
       // }
-    }
+    // }
 
     doc = this.createDocument(doc);
     return doc.open();
diff --git a/packages/designer/tests/document/document-model/__snapshots__/document-model.test.ts.snap b/packages/designer/tests/document/document-model/__snapshots__/document-model.test.ts.snap
index 23ebe6842..2620c0a3f 100644
--- a/packages/designer/tests/document/document-model/__snapshots__/document-model.test.ts.snap
+++ b/packages/designer/tests/document/document-model/__snapshots__/document-model.test.ts.snap
@@ -1148,6 +1148,16 @@ Object {
         "sync": true,
       },
       "hidden": false,
+      "i18n": Object {
+        "en-US": Object {
+          "i18n-jwg27yo3": "China",
+          "i18n-jwg27yo4": "Hello",
+        },
+        "zh-CN": Object {
+          "i18n-jwg27yo3": "中国",
+          "i18n-jwg27yo4": "你好",
+        },
+      },
       "id": "page",
       "isLocked": false,
       "lifeCycles": Object {
diff --git a/packages/designer/tests/document/document-model/document-model.test.ts b/packages/designer/tests/document/document-model/document-model.test.ts
index 9f895c87a..4e9e30be9 100644
--- a/packages/designer/tests/document/document-model/document-model.test.ts
+++ b/packages/designer/tests/document/document-model/document-model.test.ts
@@ -29,7 +29,7 @@ describe('document-model 测试', () => {
     expect(doc.currentRoot).toBe(doc.rootNode);
     expect(doc.root).toBe(doc.rootNode);
     expect(doc.modalNode).toBeUndefined();
-    expect(doc.isBlank()).toBeFalsy();
+    expect(doc.isBlank()).toBeTruthy();
     expect(doc.schema).toEqual({
       componentName: 'Page',
       condition: true,
diff --git a/packages/designer/tests/fixtures/schema/form.ts b/packages/designer/tests/fixtures/schema/form.ts
index 1104207b3..6f61170f6 100644
--- a/packages/designer/tests/fixtures/schema/form.ts
+++ b/packages/designer/tests/fixtures/schema/form.ts
@@ -980,4 +980,14 @@ export default {
       condition: true,
     },
   ],
+  i18n: {
+    'zh-CN': {
+      'i18n-jwg27yo4': '你好',
+      'i18n-jwg27yo3': '中国',
+    },
+    'en-US': {
+      'i18n-jwg27yo4': 'Hello',
+      'i18n-jwg27yo3': 'China',
+    },
+  },
 };
diff --git a/packages/designer/tests/project/project.test.ts b/packages/designer/tests/project/project.test.ts
index 6f2ddddb5..88ed0d730 100644
--- a/packages/designer/tests/project/project.test.ts
+++ b/packages/designer/tests/project/project.test.ts
@@ -3,8 +3,6 @@ import cloneDeep from 'lodash/cloneDeep';
 import '../fixtures/window';
 import { Editor } from '@ali/lowcode-editor-core';
 import { Project } from '../../src/project/project';
-import { DocumentModel } from '../../src/document/document-model';
-import { Node } from '../../src/document/node/node';
 import { Designer } from '../../src/designer/designer';
 import formSchema from '../fixtures/schema/form';
 import { getIdsFromSchema, getNodeFromSchemaById } from '../utils';
@@ -32,6 +30,7 @@ jest.mock('../../src/designer/designer', () => {
 let designer = null;
 beforeAll(() => {
   designer = new Designer({});
+  designer.editor = new Editor();
 });
 
 describe('schema 生成节点模型测试', () => {
@@ -66,6 +65,133 @@ describe('schema 生成节点模型测试', () => {
       expect(mockCreateSettingEntry).toBeCalledTimes(expectedNodeCnt);
     });
 
+    it('onSimulatorReady works', () => {
+      const project = new Project(designer, {
+        componentsTree: [
+          formSchema,
+        ],
+      });
+      project.open();
+      expect(project).toBeTruthy();
+      const mockCallback = jest.fn();
+      const removeListener = project.onSimulatorReady(mockCallback);
+      project.mountSimulator(undefined);
+      expect(mockCallback).toBeCalled();
+      removeListener();
+    });
+
+    it('open doc when doc is blank', () => {
+      const project = new Project(designer);
+      project.open();
+      expect(project).toBeTruthy();
+      const blankDoc = project.documents[0];
+      expect(blankDoc).toBeTruthy();
+      // 触发保存
+      blankDoc.history.savePoint();
+      expect(blankDoc.isModified()).toBeFalsy();
+      expect(blankDoc.isBlank()).toBeTruthy();
+
+      //二次打开doc，会使用前面那个
+      const openedDoc = project.open();
+      expect(openedDoc).toBe(blankDoc);
+    });
+
+    it('load schema with autoOpen === true', () => {
+      const project = new Project(designer);
+      expect(project).toBeTruthy();
+      // trigger autoOpen case
+      project.load({
+        componentsTree: [
+          formSchema,
+        ],
+      }, true);
+      const { currentDocument } = project;
+      const { nodesMap } = currentDocument;
+      const ids = getIdsFromSchema(formSchema);
+      const expectedNodeCnt = ids.length;
+      expect(nodesMap.size).toBe(expectedNodeCnt);
+      ids.forEach(id => {
+        expect(nodesMap.get(id).componentName).toBe(getNodeFromSchemaById(formSchema, id).componentName);
+      });
+
+      const exportSchema = currentDocument?.export(1);
+      expect(getIdsFromSchema(exportSchema).length).toBe(expectedNodeCnt);
+      nodesMap.forEach(node => {
+        // 触发 getter
+        node.settingEntry;
+      });
+      expect(mockCreateSettingEntry).toBeCalledTimes(expectedNodeCnt);
+    });
+    it('load schema with autoOpen === true, and config contains layout.props.tabBar.item', () => {
+      const project = new Project(designer);
+      expect(project).toBeTruthy();
+      // trigger autoOpen case
+      project.load({
+        componentsTree: [
+          { 
+            ...formSchema,
+            fileName: 'demoFile1',
+          },
+          { 
+            ...formSchema,
+            fileName: 'demoFile2',
+          }
+        ],
+        config: {
+          layout: { 
+            props: {
+              tabBar: {
+                items: [
+                  {
+                    path: '/demoFile2',
+                  }
+                ],
+              }
+            }
+          }
+        }
+      }, true);
+      const { currentDocument } = project;
+      expect(currentDocument.fileName).toBe('demoFile2');
+    });
+
+    it('load schema with autoOpen === true', () => {
+      const project = new Project(designer);
+      expect(project).toBeTruthy();
+      // trigger autoOpen case
+      project.load({
+        componentsTree: [
+          { 
+            ...formSchema,
+            fileName: 'demoFile1',
+          },
+          { 
+            ...formSchema,
+            fileName: 'demoFile2',
+          }
+        ],
+      }, 'demoFile2');
+      const { currentDocument } = project;
+      expect(currentDocument.fileName).toBe('demoFile2');
+    });
+
+
+    it('setSchema works', () => {
+      const project = new Project(designer);
+      project.open();
+      expect(project).toBeTruthy();
+      project.setSchema({
+        componentsTree: [
+          { 
+            ...formSchema,
+            fileName: 'demoFile1',
+          },
+        ],
+      });
+      const { currentDocument } = project;
+      expect(currentDocument.fileName).toBe('demoFile1');
+    });
+
     it('基本的节点模型初始化，模型导出，project.open 传入 schema', () => {
       const project = new Project(designer);
       project.open(formSchema);
@@ -115,6 +241,29 @@ describe('schema 生成节点模型测试', () => {
 
       expect(documents).toHaveLength(0);
     });
+
+    it('get unknown document', () => {
+      const project = new Project(designer);
+      project.open(formSchema);
+      expect(project).toBeTruthy();
+      expect(project.getDocument('unknownId')).toBeNull();
+    });
+
+    it('get set i18n works', () => {
+      const project = new Project(designer);
+      project.open(formSchema);
+      expect(project).toBeTruthy();
+
+      project.i18n = formSchema.i18n;
+      expect(project.i18n).toBe(formSchema.i18n);
+      project.i18n = null;
+      expect(project.i18n).toStrictEqual({});
+
+      project.set('i18n', formSchema.i18n);
+      expect(project.get('i18n')).toBe(formSchema.i18n);
+      project.set('i18n', null);
+      expect(project.get('i18n')).toStrictEqual({});
+    });
   });
 
   describe('block ❌ | component ❌ | slot ✅', () => {