diff --git a/.eslintrc b/.eslintrc
index 8a8e1ca..9873a66 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -8,6 +8,10 @@
     "localStorage": true
   },
   "extends": "eslint-config-airbnb",
+  "plugins": ["eslint-plugin-jest"],
+  "env": {
+    "jest/globals": true
+  },
   "rules": {
     "import/extensions": 0,
     "import/no-extraneous-dependencies": 0,
@@ -24,6 +28,11 @@
     "class-methods-use-this": 0,
     "no-param-reassign": 0,
     "no-loop-func": 0,
-    "global-require": 0
+    "global-require": 0,
+    "jest/no-disabled-tests": "warn",
+    "jest/no-focused-tests": "error",
+    "jest/no-identical-title": "error",
+    "jest/prefer-to-have-length": "warn",
+    "jest/valid-expect": "error"
   }
 }
diff --git a/README.md b/README.md
index 2f8be44..d2b4e10 100644
--- a/README.md
+++ b/README.md
@@ -15,12 +15,14 @@ and aims to help people use and manage fabric networks easily.
 
 ## Releases
 
-- [package](https://github.com/blockchain-desktop/hyperledger-fabric-desktop/releases)
+- [released app](https://github.com/blockchain-desktop/hyperledger-fabric-desktop/releases)
 
 - [source code](https://github.com/blockchain-desktop/hyperledger-fabric-desktop)
 
 ## Documentation, Getting Started and Develop Guideline
-It is highly recommended to read [index.md](doc/doc-En/index-En.md) first.
+It is highly recommended to read [index.md](doc/doc-En/index-En.md) first. 
+
+You can also watch the [introduction video](https://wiki.hyperledger.org/download/attachments/2392116/20190228_Fabric_Desktop.mp4?version=1&modificationDate=1551429922000&api=v2). 
 
 ## Contributing
 
@@ -76,7 +78,10 @@ available at http://creativecommons.org/licenses/by/4.0/.
 * [使用者：功能介绍](doc/doc-Ch/tutorial-Ch.md)  
 * [开发者：参与开发](doc/doc-Ch/coding-guidelines-Ch.md) 
 * [开发者：贡献代码](doc/doc-Ch/CONTRIBUTING-Ch.md)   
-* [项目架构](./doc/architect.md)  
+* [项目架构](./doc/architect.md)
+
+介绍视频  
+* [超级账本meetup录像](https://pan.baidu.com/s/1VU_bt4Oo_OJtk5DhCZ3L4A)
 
 ## 如何参与？
 
diff --git a/fabric/v1.1/basic-network/teardown.sh b/fabric/v1.1/basic-network/teardown.sh
index 7036793..f115207 100755
--- a/fabric/v1.1/basic-network/teardown.sh
+++ b/fabric/v1.1/basic-network/teardown.sh
@@ -14,6 +14,6 @@ docker-compose -f docker-compose.yml kill && docker-compose -f docker-compose.ym
 rm -f ~/.hfc-key-store/*
 
 # remove chaincode docker images
-docker rmi $(docker images dev-* -q)
+# docker rmi $(docker images dev-* -q)
 
 # Your system is now clean
diff --git a/package.json b/package.json
index bfec443..ae5c084 100644
--- a/package.json
+++ b/package.json
@@ -93,6 +93,8 @@
     "eslint-plugin-import": "^2",
     "eslint-plugin-jsx-a11y": "^5",
     "eslint-plugin-react": "^7",
+    "@types/jest": "^23.3.13",
+    "eslint-plugin-jest": "^22.3.0",
     "jest": "^23.6.0"
   }
 }
diff --git a/src/util/fabric.js b/src/util/fabric.js
index d3002d9..e74fe2d 100644
--- a/src/util/fabric.js
+++ b/src/util/fabric.js
@@ -18,10 +18,11 @@ class FabricClient {
     this.fabric_client = fabricClient;
   }
 
-  _gitConfig() {
+  // 抽出空挡，插入配置文件，以便集成测试
+  _getConfig(configDb) {
     const self = this;
     return new Promise((resolve, reject) => {
-      db.find({}, (err, resultList) => {
+      configDb.find({}, (err, resultList) => {
         if (err) {
           logger.info('the operation of find documents failed!');
           reject('error');
@@ -117,6 +118,7 @@ class FabricClient {
       }
       this.channels[channelName] = channel;
     } else {
+      logger.info(`channel(${channelName}) exists, get it from memory.`);
       channel = this.channels[channelName];
     }
     return channel;
@@ -197,9 +199,9 @@ class FabricClient {
     const self = this;
     return this._enrollUser(this).then((user) => {
       if (user && user.isEnrolled()) {
-        logger.info('Successfully loaded user1 from persistence');
+        logger.info(`Successfully loaded user(${user.getName()}) from persistence`);
       } else {
-        logger.error('Failed to get user1.... run registerUser.js');
+        logger.error('Failed to get user run registerUser.js');
         return Promise.reject(new Error('Failed to get user1.... run registerUser.js'));
       }
 
@@ -773,12 +775,11 @@ class FabricClient {
 
 let __fabricClient;
 
-// FabricClient单例模式。后续考虑优化为多套身份，多个client
-export default function getFabricClientSingleton() {
+export function getFabricClientSingletonHelper(dbConfig) {
   if (!__fabricClient) {
-    logger.info('strat create fabric client');
+    logger.info('instantiating fabric client.');
     __fabricClient = new FabricClient();
-    return __fabricClient._gitConfig()
+    return __fabricClient._getConfig(dbConfig)
       .then(__fabricClient._config)
       .then(__fabricClient._enrollUser)
       .then(() => Promise.resolve(__fabricClient));
@@ -786,6 +787,14 @@ export default function getFabricClientSingleton() {
   return Promise.resolve(__fabricClient);
 }
 
+// TODO: 考虑是否去除export default，全部使用export。
+// 由此保证import无需再区分 import something from 'lib' 与 import {something} from 'lib'
+
+// FabricClient单例模式。后续考虑优化为多套身份，多个client
+export default function getFabricClientSingleton() {
+  return getFabricClientSingletonHelper(db);
+}
+
 export function deleteFabricClientSingleton() {
   __fabricClient = null;
 }
diff --git a/test/resources/key/users/Org1MSP b/test/resources/key/users/Org1MSP
new file mode 100644
index 0000000..b6081c7
--- /dev/null
+++ b/test/resources/key/users/Org1MSP
@@ -0,0 +1 @@
+{"name":"Org1MSP","mspid":"Org1MSP","roles":null,"affiliation":"","enrollmentSecret":"","enrollment":{"signingIdentity":"cd96d5260ad4757551ed4a5a991e62130f8008a0bf996e4e4b84cd097a747fec","identity":{"certificate":"-----BEGIN CERTIFICATE-----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\no2HkWiuxLsibGxtE\n-----END CERTIFICATE-----\n"}}}
\ No newline at end of file
diff --git a/test/resources/key/users/cd96d5260ad4757551ed4a5a991e62130f8008a0bf996e4e4b84cd097a747fec-priv b/test/resources/key/users/cd96d5260ad4757551ed4a5a991e62130f8008a0bf996e4e4b84cd097a747fec-priv
new file mode 100644
index 0000000..fef217d
--- /dev/null
+++ b/test/resources/key/users/cd96d5260ad4757551ed4a5a991e62130f8008a0bf996e4e4b84cd097a747fec-priv
@@ -0,0 +1,5 @@
+-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgRgQr347ij6cjwX7m
+KjzbbD8Tlwdfu6FaubjWJWLGyqahRANCAARXV1+YrGwUpajujoM0EhohV5sII8Az
+0L+wsG3iklGt72lYT3zsONdmhneCVzj4Og8y1OYFGps9XBhxS+lthjyn
+-----END PRIVATE KEY-----
diff --git a/test/resources/key/users/cd96d5260ad4757551ed4a5a991e62130f8008a0bf996e4e4b84cd097a747fec-pub b/test/resources/key/users/cd96d5260ad4757551ed4a5a991e62130f8008a0bf996e4e4b84cd097a747fec-pub
new file mode 100644
index 0000000..d1ebfea
--- /dev/null
+++ b/test/resources/key/users/cd96d5260ad4757551ed4a5a991e62130f8008a0bf996e4e4b84cd097a747fec-pub
@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEV1dfmKxsFKWo7o6DNBIaIVebCCPA
+M9C/sLBt4pJRre9pWE987DjXZoZ3glc4+DoPMtTmBRqbPVwYcUvpbYY8pw==
+-----END PUBLIC KEY-----
diff --git a/test/resources/persistence/.gitkeep b/test/resources/persistence/.gitkeep
new file mode 100644
index 0000000..a10d4fe
--- /dev/null
+++ b/test/resources/persistence/.gitkeep
@@ -0,0 +1,3 @@
+# Ignore everything in this directory
+*
+# Except this file !.gitkeep
\ No newline at end of file
diff --git a/test/resources/persistence/block.db b/test/resources/persistence/block.db
new file mode 100644
index 0000000..e69de29
diff --git a/test/resources/persistence/chaincode.db b/test/resources/persistence/chaincode.db
new file mode 100644
index 0000000..e69de29
diff --git a/test/resources/persistence/config.db b/test/resources/persistence/config.db
new file mode 100644
index 0000000..bdbfb7a
--- /dev/null
+++ b/test/resources/persistence/config.db
@@ -0,0 +1 @@
+{"id":0,"isSign":1,"_id":"0RYjfGm5ZQNGBcxV","peerGrpcUrl":"grpc://localhost:7051","peerEventUrl":"grpc://localhost:7053","ordererUrl":"grpc://localhost:7050","mspid":"Org1MSP","tlsPeerPath":"","tlsOrdererPath":"","path":"test/resources/key/users/"}
diff --git a/test/resources/persistence/invoke.db b/test/resources/persistence/invoke.db
new file mode 100644
index 0000000..e69de29
diff --git a/test/util/fabric.test.js b/test/util/fabric.test.js
new file mode 100644
index 0000000..5119ab2
--- /dev/null
+++ b/test/util/fabric.test.js
@@ -0,0 +1,127 @@
+// Copyright 2019 The hyperledger-fabric-desktop Authors. All rights reserved.
+import { getFabricClientSingletonHelper } from '../../src/util/fabric';
+
+const { execSync } = require('child_process');
+const logger = require('electron-log');
+const Datastore = require('nedb');
+const path = require('path');
+
+// Steps
+// 1. start fabric network
+// 2. call client functions
+// 3. stop fabric network, clean up
+
+function initFabricNetwork() {
+  logger.info('Shuting down old Fabric Network.');
+  let buf = execSync('cd fabric/v1.1/basic-network && ./teardown.sh');
+  logger.debug(buf.toString());
+
+  logger.info('Initiating Fabric Network.');
+  buf = execSync('cd fabric/v1.1/fabcar && ./startFabric.sh');
+  logger.debug(buf.toString());
+}
+
+function clearFabricNetwork() {
+  // FIXME: 关闭网络需处理异步问题。 直接关闭会导致异步测试未结束，而网络被关闭。
+  // 当前解决方案，在initFabricNetwork()中关闭网络
+
+  // logger.info('clearing Fabric Network.');
+  // const buf = execSync('cd fabric/v1.1/basic-network && ./teardown.sh');
+  // logger.debug(buf.toString());
+}
+
+beforeAll(() => {
+  jest.setTimeout(10000);
+  initFabricNetwork();
+});
+
+afterAll(clearFabricNetwork);
+
+// 注意, config.db文件中的"path"字段，对应fabric-node-sdk的用户私钥仓库路径，需根据测试环境配置，
+// 目前只处理fabric v1.1-basic-network的例子，处理fabric v1.3需同时考虑sdk版本升级，以及启动脚本的调整等
+const configDbForTest = new Datastore({
+  filename: path.join(__dirname, '../resources/persistence/config.db'),
+  autoload: true,
+});
+
+describe('Fabric Client Basic', () => {
+  it('instantiate client.', () =>
+    getFabricClientSingletonHelper(configDbForTest)
+      .then((client) => {
+        expect(client)
+          .not
+          .toBeNull();
+      }));
+
+  it('query chaincode', () => {
+    const clientPromise = getFabricClientSingletonHelper(configDbForTest);
+    return clientPromise.then((client) => {
+      logger.info('OK. Got client. client.channel: ', client.channels);
+      client.queryCc('fabcar', 'queryAllCars', null, 'mychannel')
+        .then((result) => {
+          logger.info('query result: ', result);
+          expect(result)
+            .not
+            .toBeNull();
+        })
+        .catch((err) => {
+          logger.error(err);
+          throw new Error();
+        });
+    });
+  });
+});
+
+describe('Fabric Client Advanced', () => {
+  describe('invoke chaincode', () => {
+    it('invoke for one peer', () => getFabricClientSingletonHelper(configDbForTest)
+      .then(client => client.invokeCc('fabcar',
+        'changeCarOwner',
+        ['CAR0', 'newPerson'],
+        'mychannel',
+        [],
+        [],
+        [])
+        .then((result) => {
+          logger.info('invoke result: ', result);
+          expect(result)
+            .not
+            .toBeNull();
+          return Promise.resolve();
+        }))
+      .catch((err) => {
+        logger.info('catch invoke reject');
+        logger.info(err);
+        throw err;
+      }));
+
+    it('invoke for multiple peers', () => {
+      // TODO: to be implemented
+    });
+  });
+
+  it('install chaincode', () => {
+
+  });
+
+  it('instantiate chaincode', () => {
+
+  });
+
+  it('upgrade chaincode', () => {
+
+  });
+
+  it('query block info', () => {
+
+  });
+
+  it('create channel', () => {
+
+  });
+
+  it('join peer to channel', () => {
+
+  });
+});
+