diff --git a/.gitignore b/.gitignore
index cc0263aa813349b6aa27451f443f8e4d8f5202b4..46670a251ecc9d50fe321eeafd4ed75fcae4dd41 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,3 +53,4 @@ t.*
 .DS_Store
 /dist/
 yarn.lock
+.yarn/
diff --git a/Dockerfile b/Dockerfile
index d8152893f508ebe45c3081567499eeeaaa3905bc..18fafc017e1aa80fb07fff057a1480af6268e556 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,11 +6,12 @@
 #
 # Docker image for Alpine Linux with latest ShellCheck, a static analysis tool for shell scripts.
 # https://hub.docker.com/r/nlknguyen/alpine-shellcheck/
-FROM nlknguyen/alpine-shellcheck
+# FROM nlknguyen/alpine-shellcheck
+FROM mhart/alpine-node:7
 MAINTAINER Zhuophuan LI <zixia@zixia.net>
 
 RUN  apk update && apk upgrade \
-  && apk add nodejs \
+  && apk add \
       bash \
       ca-certificates \
       chromium-chromedriver \
diff --git a/bin/entrypoint.sh b/bin/entrypoint.sh
index 8c603f28186c67cc4593cf4d3a7002f0a8bf7e93..693128ab06562b9c864d1d090af669f9bf18af76 100755
--- a/bin/entrypoint.sh
+++ b/bin/entrypoint.sh
@@ -113,6 +113,8 @@ function wechaty::runBot() {
     echo "Install dependencies modules ..."
     yarn < /dev/null # yarn will close stdin??? cause `read` command fail after yarn
   }
+  npm --progress=false install @types/node > /dev/null
+
 
   # echo -n "Linking Wechaty module to bot ... "
   # npm link wechaty < /dev/null > /dev/null 2>&1
@@ -137,6 +139,17 @@ function wechaty::runBot() {
   return "$ret"
 }
 
+function wechaty::help() {
+  echo <<HELP
+  Usage: wechaty <mybot.js | mybot.ts | command>
+
+  1. mybot.js: a JavaScript program for your bot. will run by node v6
+  2. mybot.ts: a TypeScript program for your bot. will run by ts-node
+  3. command: demo, test, doctor
+
+HELP
+}
+
 function main() {
   wechaty::banner
   figlet Connecting
@@ -175,6 +188,14 @@ function main() {
       npm "$@" || ret=$?
       ;;
 
+    '')
+      if [ -n "$WECHATY_TOKEN" ]; then
+        npm start
+      else
+        wechaty::help
+      fi
+      ;;
+
     #
     # 4. Default to execute npm run ...
     #
diff --git a/circle.yml b/circle.yml
index 65461cd465d282ee7f827b938131971d98e492f3..037ceeca32982e1089c0d95685f024d6c7019141 100644
--- a/circle.yml
+++ b/circle.yml
@@ -8,6 +8,7 @@ machine:
 test:
   override:
   - docker info
+  - docker run -ti -v "$(pwd)":/mnt nlknguyen/alpine-shellcheck bin/*.sh
   - ./script/docker.sh build
   - ./script/docker.sh run shlint
   - ./script/docker.sh test
diff --git a/index.ts b/index.ts
index fd9b8768491e917bb9652f05c6bd40b9f99d47fe..a92ef9949d2ce3c1508f44ba6ce77cfa78bbe979 100644
--- a/index.ts
+++ b/index.ts
@@ -30,3 +30,4 @@ export {
   , Wechaty
   , log // for convenionce use npmlog with environment variable LEVEL
 }
+
diff --git a/package.json b/package.json
index 03c119c36b72d29510d1e678ff3d4b193ac2f0c6..f3cc3bdcce1b2f8ffb60a6961eaccfb07401c84a 100755
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "lint": "npm run eslint && npm run tslint",
     "eslint": "eslint \"{bin,example,src,test}/**/*.js\"",
     "tslint": "tslint \"{bin,example,src,test}/**/*.ts\" && tsc --noEmit",
-    "shlint": "bash -n bin/*.sh && shellcheck bin/*.sh",
+    "shlint": "bash -n bin/*.sh",
     "pretest": "npm run clean && npm run lint && npm run build",
     "sloc": "sloc bin example src test index.ts --details --format cli-table --keys total,source,comment && sloc bin example src test index.ts",
     "test": "npm run test:chrome",
@@ -34,7 +34,7 @@
     "test:chrome": "cross-env LC_ALL=C WECHATY_LOG=verbose WECHATY_HEAD=chrome ava --serial --fail-fast --verbose --ext js --timeout=7m \"dist/{src,test}/**/*.spec.js\"",
     "testdev": "cross-env LC_ALL=C WECHATY_LOG=silly ava --ext ts --serial --verbose --fail-fast --timeout=3m",
     "testdist": "cross-env WECHATY_LOG=SILLY WECHATY_HEAD=chrome ava --ext ts --verbose --fail-fast --timeout=2m",
-    "ava": "cross-env LC_ALL=C WECHATY_LOG=verbose ts-node node_modules/.bin/ava \"{src,test}/**/*.spec.js\"",
+    "ava": "cross-env LC_ALL=C WECHATY_LOG=verbose node_modules/.bin/ava --ext js",
     "start": "ts-node bin/client",
     "dev": "ts-node dev.ts",
     "demo": "ts-node example/ding-dong-bot.ts"
diff --git a/script/docker.sh b/script/docker.sh
index 98de4c4f075ff9169e0061b5f978ae24cefb134b..acb8e6d5bd68a81b2e2597333c0c935fd0869711 100755
--- a/script/docker.sh
+++ b/script/docker.sh
@@ -1,25 +1,41 @@
-#!/bin/sh
+#!/bin/bash
 #
 # 1. CircleCI with `Btrfs volume error`
 #   https://circleci.com/docs/docker-btrfs-error/
 #
+set -e
+
 imageName='wechaty:test'
 
 optRm='--rm'
 [ -n "$CIRCLECI" ] && optRm='--rm=false'
 
-if [ "$1" = "build" ] || [ "$1" = "" ]; then
-  echo docker build "$optRm" -t "$imageName" .
-  exec docker build "$optRm" -t "$imageName" .
+declare -i ret=0
+case "$1" in
+  build | '')
+    echo docker build "$optRm" -t "$imageName" .
+    exec docker build "$optRm" -t "$imageName" .
+    ret=$?
+    ;;
+
+  test)
+    echo docker run -ti "$optRm" -v /dev/shm:/dev/shm -v "$(pwd)":/bot "$imageName" test/docker-bot/js-bot.js
+    docker run -ti "$optRm" -v /dev/shm:/dev/shm -v "$(pwd)":/bot "$imageName" test/docker-bot/js-bot.js
 
-  ret=$?
-  echo "ERROR: exec return $ret ???"
-  exit $ret
-fi
+    echo docker run -ti "$optRm" -v /dev/shm:/dev/shm -v "$(pwd)":/bot "$imageName" test/docker-bot/ts-bot.ts
+    docker run -ti "$optRm" -v /dev/shm:/dev/shm -v "$(pwd)":/bot "$imageName" test/docker-bot/ts-bot.ts
 
-echo docker run -ti "$optRm" -v /dev/shm:/dev/shm "$imageName" $@
-exec docker run -ti "$optRm" -v /dev/shm:/dev/shm "$imageName" $@
+    echo docker run -ti "$optRm" -v /dev/shm:/dev/shm "$imageName" "$@"
+    exec docker run -ti "$optRm" -v /dev/shm:/dev/shm "$imageName" "$@"
+    ret=$?
+    ;;
+    
+  *)
+    echo docker run -ti "$optRm" -v /dev/shm:/dev/shm "$imageName" "$@"
+    exec docker run -ti "$optRm" -v /dev/shm:/dev/shm "$imageName" "$@"
+    ret=$?
+    ;;
+esac
 
-ret=$?
 echo "ERROR: exec return $ret ???"
 exit $ret
diff --git a/src/puppet-web/browser.spec.ts b/src/puppet-web/browser.spec.ts
new file mode 100755
index 0000000000000000000000000000000000000000..30bd92f73b37676d83aebebfa03d3709862ef0ca
--- /dev/null
+++ b/src/puppet-web/browser.spec.ts
@@ -0,0 +1,41 @@
+/**
+ * Wechaty - Wechat for Bot. Connecting ChatBots
+ *
+ * Licenst: ISC
+ * https://github.com/wechaty/wechaty
+ *
+ */
+import { test } from 'ava'
+
+import {
+  //   Config
+  // , log
+} from '../config'
+
+import {
+    Browser
+} from './browser'
+
+test('quit()', async t => {
+  const browser = new Browser()
+  await browser.driver.init() // init driver, not init browser
+
+  t.throws(browser.quit(), Error, 'should throw on an un-inited browser')
+
+  browser.state.current('open', false)
+  t.notThrows(browser.quit(), 'should not throw exception when call quit() on an `inprocess` `open` state browser')
+
+  browser.state.current('close')
+  t.throws(browser.quit(), Error, 'should throw exception when call quit() twice on browser')
+
+})
+
+test('init()', async t => {
+  const browser = new Browser()
+
+  browser.state.current('open')
+  t.throws(browser.init(), Error, 'should throw exception when call init() on an `open` state browser')
+
+  browser.state.current('open', false)
+  t.throws(browser.init(), Error, 'should throw exception when call init() on a `open`-`ing` state browser')
+})
diff --git a/src/puppet-web/browser.ts b/src/puppet-web/browser.ts
index 4bba1a70ca3aa13a2498457b75a70f6ef97e2bf4..2f3d8cd4074dd118903d22e1cf270dd17776ffaa 100644
--- a/src/puppet-web/browser.ts
+++ b/src/puppet-web/browser.ts
@@ -53,6 +53,17 @@ export class Browser extends EventEmitter {
   public async init(): Promise<void> {
     log.verbose('PuppetWebBrowser', 'init()')
 
+    if (this.state.current() === 'open') {
+      let e: Error
+      if (this.state.inprocess()) {
+        e = new Error('init() fail: current state is `open`-`ing`')
+      } else {
+        e = new Error('init() fail: current state is `open`')
+      }
+      log.error('PuppetWebBrowser', e.message)
+      throw e
+    }
+
     this.state.target('open')
     this.state.current('open', false)
 
@@ -134,15 +145,14 @@ export class Browser extends EventEmitter {
     log.verbose('PuppetWebBrowser', 'quit()')
 
     if (this.state.current() === 'close') {
+      let e: Error
       if (this.state.inprocess()) {
-        const e = new Error('quit() on a browser with state.current():`close` and inprocess():`true` ?')
-        log.warn('PuppetWebBrowser', e.message)
-        throw e
+        e = new Error('quit() fail: on a browser with state.current():`close` and inprocess():`true` ?')
       } else { // stable
-        const e = new Error('quit() on a already quit-ed browser')
-        log.warn('PuppetWebBrowser', e.message)
-        throw e
+        e = new Error('quit() fail: on a already quit-ed browser')
       }
+      log.warn('PuppetWebBrowser', e.message)
+      throw e
     }
 
     this.state.current('close', false)
@@ -275,6 +285,7 @@ export class Browser extends EventEmitter {
       return await this.driver.executeScript.apply(this.driver, arguments)
     } catch (e) {
       // this.dead(e)
+      log.verbose('PuppetWebBrowser', 'execute() script: %s', script)
       log.warn('PuppetWebBrowser', 'execute() exception: %s, %s', e.message.substr(0, 99), e.stack)
       throw e
     }
diff --git a/test/docker-bot/js-bot.js b/test/docker-bot/js-bot.js
new file mode 100644
index 0000000000000000000000000000000000000000..3b446b2cfea25939aa0cc11e06145c464b9c68d3
--- /dev/null
+++ b/test/docker-bot/js-bot.js
@@ -0,0 +1,4 @@
+const { Wechaty } = require('wechaty')
+
+const bot = Wechaty.instance()                                                                                                               
+console.log(bot.version())
diff --git a/test/docker-bot/ts-bot.ts b/test/docker-bot/ts-bot.ts
new file mode 100644
index 0000000000000000000000000000000000000000..db4b7422b286bf33a172153814f96720e493ea50
--- /dev/null
+++ b/test/docker-bot/ts-bot.ts
@@ -0,0 +1,4 @@
+import { Wechaty } from 'wechaty'
+
+const bot = Wechaty.instance()
+console.log(bot.version())
diff --git a/test/puppet-web/browser.spec.ts b/test/puppet-web/browser.spec.ts
index 72666b1a4ec010aa8aa0cea4fdf3a5d1921af01e..637a565240cf32454e1f2999e4999ccbb08850db 100644
--- a/test/puppet-web/browser.spec.ts
+++ b/test/puppet-web/browser.spec.ts
@@ -20,7 +20,7 @@ import {
 const PROFILE = Config.DEFAULT_PROFILE + '-' + process.pid + '-'
 let profileCounter = 1
 
-test('Browser Cookie smoking test', async t => {
+test('Cookie smoking test', async t => {
   const browser = new Browser()
   t.truthy(browser, 'should instanciate a browser instance')
 
@@ -83,10 +83,10 @@ test('Browser Cookie smoking test', async t => {
   await browser.driver.quit()
 })
 
-test('Browser Cookie save/load test', async t => {
+test('Cookie save/load', async t => {
   const profileName = PROFILE + profileCounter++ + 'wechaty.json'
 
-  let b = new Browser({
+  let browser = new Browser({
       head: Config.head
     , sessionFile: profileName
   })
@@ -95,14 +95,14 @@ test('Browser Cookie save/load test', async t => {
    * use exception to call b.quit() to clean up
    */
   try {
-    t.truthy(b, 'should get a new Browser')
+    t.truthy(browser, 'should get a new Browser')
 
-    b.state.target('open')
+    browser.state.target('open')
 
-    await b.driver.init()
+    await browser.driver.init()
     t.pass('should init driver')
 
-    await b.open()
+    await browser.open()
     t.pass('opened')
 
     const EXPECTED_COOKIE = {
@@ -115,43 +115,43 @@ test('Browser Cookie save/load test', async t => {
     }
     const EXPECTED_NAME_REGEX = new RegExp('^' + EXPECTED_COOKIE.name + '$')
 
-    await b.driver.manage().deleteAllCookies()
-    let cookies = await b.driver.manage().getCookies()
+    await browser.driver.manage().deleteAllCookies()
+    let cookies = await browser.driver.manage().getCookies()
     t.is(cookies.length, 0, 'should no cookie after deleteAllCookies()')
 
-    await b.addCookie(EXPECTED_COOKIE)
-    const cookieFromBrowser = await b.driver.manage().getCookie(EXPECTED_COOKIE.name)
+    await browser.addCookie(EXPECTED_COOKIE)
+    const cookieFromBrowser = await browser.driver.manage().getCookie(EXPECTED_COOKIE.name)
     t.is(cookieFromBrowser.name, EXPECTED_COOKIE.name, 'cookie from getCookie() should be same as we just set')
 
-    let cookiesFromCheck = await b.readCookie()
+    let cookiesFromCheck = await browser.readCookie()
     t.truthy(cookiesFromCheck.length, 'should get cookies from checkSession() after addCookies()')
     let cookieFromCheck  = cookiesFromCheck.filter(c => EXPECTED_NAME_REGEX.test(c['name']))
     t.is(cookieFromCheck[0]['name'], EXPECTED_COOKIE.name, 'cookie from checkSession() return should be same as we just set by addCookies()')
 
-    await b.saveCookie()
-    const cookiesFromSave = await b.readCookie()
+    await browser.saveCookie()
+    const cookiesFromSave = await browser.readCookie()
     t.truthy(cookiesFromSave.length, 'should get cookies from saveSession()')
     const cookieFromSave  = cookiesFromSave.filter(c => EXPECTED_NAME_REGEX.test(c['name']))
     t.is(cookieFromSave.length, 1, 'should has the cookie we just set')
     t.is(cookieFromSave[0]['name'], EXPECTED_COOKIE.name, 'cookie from saveSession() return should be same as we just set')
 
-    await b.driver.manage().deleteAllCookies()
-    cookiesFromCheck = await b.readCookie()
+    await browser.driver.manage().deleteAllCookies()
+    cookiesFromCheck = await browser.readCookie()
     t.is(cookiesFromCheck.length, 0, 'should no cookie from checkSession() after deleteAllCookies()')
 
-    await b.loadCookie().catch(() => { /* fail safe */ })
-    const cookiesFromLoad = await b.readCookie()
+    await browser.loadCookie().catch(() => { /* fail safe */ })
+    const cookiesFromLoad = await browser.readCookie()
     t.truthy(cookiesFromLoad.length, 'should get cookies after loadSession()')
     const cookieFromLoad = cookiesFromLoad.filter(c => EXPECTED_NAME_REGEX.test(c.name))
     t.is(cookieFromLoad[0].name, EXPECTED_COOKIE.name, 'cookie from loadSession() should has expected cookie')
 
-    cookiesFromCheck = await b.readCookie()
+    cookiesFromCheck = await browser.readCookie()
     t.truthy(cookiesFromCheck.length, 'should get cookies from checkSession() after loadSession()')
     cookieFromCheck  = cookiesFromCheck.filter(c => EXPECTED_NAME_REGEX.test(c['name']))
     t.truthy(cookieFromCheck.length, 'should has cookie after filtered after loadSession()')
     t.is(cookieFromCheck[0]['name'], EXPECTED_COOKIE.name, 'cookie from checkSession() return should has expected cookie after loadSession')
 
-    await b.quit()
+    await browser.driver.quit()
     t.pass('quited')
 
     /**
@@ -159,24 +159,24 @@ test('Browser Cookie save/load test', async t => {
      * with the same sessionFile: profileName
      */
 
-    b = new Browser({
+    browser = new Browser({
         head: Config.head
       , sessionFile: profileName
     })
 
     t.pass('should started a new Browser')
 
-    b.state.target('open')
+    browser.state.target('open')
 
-    await b.driver.init()
+    await browser.driver.init()
     t.pass('should inited the new Browser')
-    await b.open()
+    await browser.open()
     t.pass('should opened')
 
-    await b.loadCookie()
+    await browser.loadCookie()
     t.pass('should loadSession for new Browser(process)')
 
-    const cookieAfterQuit = await b.driver.manage().getCookie(EXPECTED_COOKIE.name)
+    const cookieAfterQuit = await browser.driver.manage().getCookie(EXPECTED_COOKIE.name)
     t.truthy(cookieAfterQuit, 'should get cookie from getCookie()')
     t.is(cookieAfterQuit.name, EXPECTED_COOKIE.name, 'cookie from getCookie() after browser quit, should load the right cookie back')
 
@@ -186,10 +186,10 @@ test('Browser Cookie save/load test', async t => {
       }
     })
 
-    await b.quit()
+    await browser.driver.quit()
   } catch (e) {
-    if (b) {
-      await b.quit()
+    if (browser) {
+      await browser.driver.quit()
     }
     t.fail('exception: ' + e.message)
   }