diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..11d0faa
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,11 @@
+language: node_js
+node_js:
+  - "node"
+  - "7"
+  - "6"
+  - "5"
+  - "4"
+  - "lts/*"
+script: npm test
+env:
+  CODECLIMATE_REPO_TOKEN: a174b03227cdc953c831f45bebcf0af357ec1b8a4b8477f36444c16f084a409f
diff --git a/README.md b/README.md
index ded8f9f..d553004 100644
--- a/README.md
+++ b/README.md
@@ -1,14 +1,16 @@
 # Dota 2 Random - Alexa Skill
 
-Skill is now available from the [Alexa Skill Store](https://www.amazon.com/binhonglee-Dota2-Random/dp/B073W4GDLS)!
+[![Build Status](https://travis-ci.org/binhonglee/dota2-random.svg?branch=master)](https://travis-ci.org/binhonglee/dota2-random) [![Test Coverage](https://codeclimate.com/github/binhonglee/dota2-random/badges/coverage.svg)](https://codeclimate.com/github/binhonglee/dota2-random/coverage) [![Dependency Status](https://gemnasium.com/badges/github.com/binhonglee/dota2-random.svg)](https://gemnasium.com/github.com/binhonglee/dota2-random)
 
-#### Dependency
-- alexa-sdk
+## Skill is now available from the [Alexa Skill Store](https://www.amazon.com/binhonglee-Dota2-Random/dp/B073W4GDLS)!
+
+### Dependency
 - node.js
+- alexa-sdk
 
-## Documentations
+### Documentations
 
-### Intents
+#### Intents
 
 | Intents | Description |
 |:---------|:------------|
@@ -20,7 +22,7 @@ Skill is now available from the [Alexa Skill Store](https://www.amazon.com/binho
 | `AMAZON.HelpIntent` | Provide examples on how to use the skill |
 | `Stop` | Stop the skill |
 
-### ROLE_TYPES (Custom slot)
+#### ROLE_TYPES (Custom slot)
 - melee
 - ranged
 - carry
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..345b0a8
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,146 @@
+{
+  "name": "dota2-random",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "alexa-sdk": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/alexa-sdk/-/alexa-sdk-1.0.11.tgz",
+      "integrity": "sha1-u8XZXJh4vHbEtI95Ca1iDIEESZU=",
+      "requires": {
+        "aws-sdk": "2.95.0",
+        "i18next": "3.5.2",
+        "i18next-sprintf-postprocessor": "0.2.2"
+      },
+      "dependencies": {
+        "aws-sdk": {
+          "version": "2.95.0",
+          "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.95.0.tgz",
+          "integrity": "sha1-JuIdsUlEOx8GOUnch5hPDRdwDmo=",
+          "requires": {
+            "buffer": "4.9.1",
+            "crypto-browserify": "1.0.9",
+            "events": "1.1.1",
+            "jmespath": "0.15.0",
+            "querystring": "0.2.0",
+            "sax": "1.2.1",
+            "url": "0.10.3",
+            "uuid": "3.0.1",
+            "xml2js": "0.4.17",
+            "xmlbuilder": "4.2.1"
+          },
+          "dependencies": {
+            "buffer": {
+              "version": "4.9.1",
+              "resolved": "https://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
+              "integrity": "sha1-bRu2AbB6TvztlwlBMgkwJ8lbwpg=",
+              "requires": {
+                "base64-js": "1.2.1",
+                "ieee754": "1.1.8",
+                "isarray": "1.0.0"
+              },
+              "dependencies": {
+                "base64-js": {
+                  "version": "1.2.1",
+                  "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.2.1.tgz",
+                  "integrity": "sha1-qRlH2h9KUW6jjltOwOw3c2deCIY="
+                },
+                "ieee754": {
+                  "version": "1.1.8",
+                  "resolved": "http://registry.npmjs.org/ieee754/-/ieee754-1.1.8.tgz",
+                  "integrity": "sha1-vjPUCsEO8ZJnAfbwii2G+/0a0+Q="
+                },
+                "isarray": {
+                  "version": "1.0.0",
+                  "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+                  "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
+                }
+              }
+            },
+            "crypto-browserify": {
+              "version": "1.0.9",
+              "resolved": "https://registry.npmjs.org/crypto-browserify/-/crypto-browserify-1.0.9.tgz",
+              "integrity": "sha1-zFRJaF37hesRyYKKzHy4erW7/MA="
+            },
+            "events": {
+              "version": "1.1.1",
+              "resolved": "http://registry.npmjs.org/events/-/events-1.1.1.tgz",
+              "integrity": "sha1-nr23Y1rQmccNzEwqH1AEKI6L2SQ="
+            },
+            "jmespath": {
+              "version": "0.15.0",
+              "resolved": "https://registry.npmjs.org/jmespath/-/jmespath-0.15.0.tgz",
+              "integrity": "sha1-o/Iiqarp+Wb10nx5ZRDigJF2Qhc="
+            },
+            "querystring": {
+              "version": "0.2.0",
+              "resolved": "https://registry.npmjs.org/querystring/-/querystring-0.2.0.tgz",
+              "integrity": "sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA="
+            },
+            "sax": {
+              "version": "1.2.1",
+              "resolved": "https://registry.npmjs.org/sax/-/sax-1.2.1.tgz",
+              "integrity": "sha1-e45lYZCyKOgaZq6nSEgNgozS03o="
+            },
+            "url": {
+              "version": "0.10.3",
+              "resolved": "https://registry.npmjs.org/url/-/url-0.10.3.tgz",
+              "integrity": "sha1-Ah5NnHcF8hu/N9A861h2dAJ3TGQ=",
+              "requires": {
+                "punycode": "1.3.2",
+                "querystring": "0.2.0"
+              },
+              "dependencies": {
+                "punycode": {
+                  "version": "1.3.2",
+                  "resolved": "http://registry.npmjs.org/punycode/-/punycode-1.3.2.tgz",
+                  "integrity": "sha1-llOgNvt8HuQjQvIyXM7v6jkmxI0="
+                }
+              }
+            },
+            "uuid": {
+              "version": "3.0.1",
+              "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.0.1.tgz",
+              "integrity": "sha1-ZUS7ot/ajBzxfmKaOjBeK7H+5sE="
+            },
+            "xml2js": {
+              "version": "0.4.17",
+              "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.17.tgz",
+              "integrity": "sha1-F76T6q4/O3eTWceVtBlwWogX6Gg=",
+              "requires": {
+                "sax": "1.2.1",
+                "xmlbuilder": "4.2.1"
+              }
+            },
+            "xmlbuilder": {
+              "version": "4.2.1",
+              "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-4.2.1.tgz",
+              "integrity": "sha1-qlijBBoGb5DqoWwvU4n/GfP0YaU=",
+              "requires": {
+                "lodash": "4.17.4"
+              },
+              "dependencies": {
+                "lodash": {
+                  "version": "4.17.4",
+                  "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+                  "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4="
+                }
+              }
+            }
+          }
+        },
+        "i18next": {
+          "version": "3.5.2",
+          "resolved": "https://registry.npmjs.org/i18next/-/i18next-3.5.2.tgz",
+          "integrity": "sha1-kwOQ1cMYzqpIWLUt0OQOayA/n0E="
+        },
+        "i18next-sprintf-postprocessor": {
+          "version": "0.2.2",
+          "resolved": "https://registry.npmjs.org/i18next-sprintf-postprocessor/-/i18next-sprintf-postprocessor-0.2.2.tgz",
+          "integrity": "sha1-LkCfEENXk4Jpi2otpwzapVHWfqQ="
+        }
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
index 46d5c4e..9e4a503 100644
--- a/package.json
+++ b/package.json
@@ -6,14 +6,18 @@
   "dependencies": {
     "alexa-sdk": "^1.0.7"
   },
+  "scripts": {
+    "test": "npm install -g standard && standard && node test/testflow.js && npm uninstall -g standard"
+  },
   "author": "binhonglee",
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "git+ssh://git@github.com/binhonglee/dota2-alexa-skill.git"
+    "url": "git+ssh://git@github.com/binhonglee/dota2-random.git"
   },
   "bugs": {
-    "url": "https://github.com/binhonglee/dota2-alexa-skill/issues"
+    "url": "https://github.com/binhonglee/dota2-random/issues"
   },
-  "homepage": "https://github.com/binhonglee/dota2-alexa-skill#readme"
+  "homepage": "https://github.com/binhonglee/dota2-random#readme",
+  "devDependencies": {}
 }
diff --git a/src/index.js b/src/index.js
index ee979bb..e9b47ad 100644
--- a/src/index.js
+++ b/src/index.js
@@ -81,7 +81,8 @@ function randomHero (categories, callback) {
     }
 
     if (!possible) {
-      callback('Random failed')
+      var errorMessage = 'Random failed'
+      callback(errorMessage)
       return
     }
 
diff --git a/test/dialogs/default.txt b/test/dialogs/default.txt
new file mode 100644
index 0000000..87f3ad5
--- /dev/null
+++ b/test/dialogs/default.txt
@@ -0,0 +1,7 @@
+LaunchRequest
+AMAZON.HelpIntent
+AnyRequest
+RequestIntent Role=agility
+RequestTwoIntent RoleOne=melee RoleTwo=ranged
+RequestThreeIntent RoleOne=melee RoleTwo=intelligence RoleThree=support
+Stop
diff --git a/test/testflow.js b/test/testflow.js
new file mode 100644
index 0000000..ec5d7dd
--- /dev/null
+++ b/test/testflow.js
@@ -0,0 +1,290 @@
+// Test Flow - a multiple intent test script for Alexa Lambda code
+// Launch from a Terminal Prompt.  Examples:
+// node testflow
+// node testflow staterequest.txt
+
+// Originally taken from https://github.com/alexa/alexa-cookbook/blob/master/testing/TestFlow/testflow.js
+
+// Toggle on or off various debugging outputs
+const options = {
+  speechOutput: true,
+  slots: true,
+  stdout: false, // standard output  / console.log() in your code
+  requestEvent: false, // show the full request JSON sent to your code
+  reprompt: false,
+  delay: 1.0 // seconds between requests
+}
+
+var locale = 'en-US'
+
+var fs = require('fs')
+var MyLambdaFunction = require('../src/index.js') // Your Lambda source with exports.handler
+
+var MyDialog = './test/dialogs/default.txt'
+var appId = '' // 'amzn1.ask.skill.d60ceb98-befe-4f49-a627-1f20f6e98d94'
+var slotArray = []
+
+if (process.argv[2]) {
+  MyDialog = './dialogs/' + process.argv[2]
+}
+
+console.log()
+console.log('================================================================================')
+console.log('Running test sequence from dialog file : ', MyDialog)
+console.log()
+
+const OriginalConsoleLog = console.log
+
+var slotname = ''
+var slotvalue = ''
+var sa = {}
+var currentLine = 1
+var lineArray = []
+var Intent = ''
+var prompt = false
+
+var context = {
+  'succeed': function (data) {
+    if (data.response.shouldEndSession) {
+      sa = {}
+    } else {
+      sa = data.sessionAttributes
+    }
+
+    console.log = OriginalConsoleLog
+    var textToSay = data.response.outputSpeech.ssml
+
+    if (options.speechOutput) {
+      console.log('\n\x1b[36m%s\x1b[0m', textToSay)
+    }
+
+    if (data.response.reprompt && data.response.reprompt.outputSpeech && data.response.reprompt.outputSpeech.ssml) {
+      var textReprompt = data.response.reprompt.outputSpeech.ssml
+      if (options.reprompt) {
+        // console.log('%s \x1b[33m\x1b[1m%s\x1b[0m \x1b[2m%s\x1b[0m', currentLine+1, Intent, sdkState)
+        console.log('\x1b[36m \x1b[2m%s\x1b[0m ', textReprompt)
+      }
+    }
+
+    if (data.response.shouldEndSession) {
+      console.log('\n================= Session Ended =================')
+    }
+
+    if (currentLine < lineArray.length) {
+      console.log()
+      runSingleTest(lineArray, currentLine++, sa)
+    } else {
+      console.log('')
+      process.exit()
+    }
+  },
+  'fail': function (err) {
+    console.log('context.fail occurred')
+    console.log(JSON.stringify(err, null, '\t'))
+  }
+}
+
+fs.readFile(MyDialog, function (err, data) {  // open dialog sequence file and read Intents
+  // var newSession = true
+  if (err) {}
+  lineArray = cleanArray(data.toString().split('\n')) // remove empty or comment lines (# or //)
+  runSingleTest(lineArray, 0, {})
+})
+
+function runSingleTest (myLineArray, currentLine, sa) {
+  // console.log('--------------------------------------------------------------------------------')
+  // console.log('testing line ', currentLine)
+  // console.log('testing line values ', myLineArray[currentLine])
+  prompt = false
+  var newSession = true
+  if (currentLine > 0) {
+    newSession = false
+  }
+
+  var tokenArray = myLineArray[currentLine].split(' ')
+
+  if (tokenArray[0].replace('\r', '') === '?') {  // pause and prompt the user to confirm
+    prompt = true
+    // console.log(' ----------------- > prompt')
+    tokenArray.shift()  // removes first item
+  }
+
+  var requestType = tokenArray[0].replace('\r', '')
+  tokenArray.shift()
+
+  if (requestType === 'stop') {
+    console.log('')
+    process.exit()
+  }
+
+  Intent = requestType
+  // slotArray = []
+
+  var sdkState = ''
+  if (sa['STATE']) {
+    sdkState = sa['STATE']
+  }
+
+  console.log('%s \x1b[33m\x1b[1m%s\x1b[0m \x1b[2m%s\x1b[0m', currentLine + 1, Intent, sdkState)
+  processArray(tokenArray, function (request) {
+    prepareTestRequest(sa, newSession, request)
+  })
+}
+
+function processArray (arr, cb) {
+  if (arr.length > 0) {
+    var equalsPosition = arr[0].indexOf('=')
+    slotname = arr[0].substr(0, equalsPosition)
+    slotvalue = decodeURI(arr[0].substr(equalsPosition + 1, 300)).replace('\r', '')
+
+    promptForSlot(prompt, slotname, slotvalue, (newValue) => {
+      // console.log('slotname, slotvalue, newValue')
+      // console.log(slotname, slotvalue, newValue)
+
+      var answer = newValue.toString().trim()
+
+      // console.log('answer = ' + answer)
+
+      if (answer === '') {
+        answer = slotvalue
+      }
+
+      if (answer !== '') {
+        slotArray.push('"' + slotname + '": {"name":"' + slotname + '","value":"' + answer + '"}')
+      }
+
+      arr.shift()
+      processArray(arr, cb)  // RECURSION
+    })
+  } else {  // nothing left in slot array
+    var slotArrayString = '{' + slotArray.toString() + '}'
+
+    var slotObj = JSON.parse(slotArrayString)
+
+    var req = {
+      'type': 'IntentRequest',
+      'intent': {
+        'name': Intent,
+        'slots': slotObj
+      },
+      'locale': locale
+    }
+    cb(req)
+    // process.exit()
+  }
+}
+
+function prepareTestRequest (sa, newSession, request) {
+  var eventJSON = {
+    'session': {
+      'sessionId': 'SessionId.f9e6dcbb-b7da-4b47-905c.etc.etc',
+      'application': {
+        'applicationId': appId
+      },
+      'attributes': sa,
+      'user': {
+        'userId': 'amzn1.ask.account.VO3PVTGF563MOPBY.etc.etc'
+      },
+      'new': newSession
+    },
+    request,
+    'version': '1.0'
+  }
+
+  if (options.requestEvent) {
+    console.log(JSON.stringify(request, null, 2))
+  }
+
+  // blocking pause
+  var waitTill = new Date(new Date().getTime() + options.delay * 1000)
+  while (waitTill > new Date()) {}
+
+  // call the function
+  if (options.stdout) {
+    MyLambdaFunction['handler'](eventJSON, context, callback)
+  } else {
+    // console.log('setting log to {}')
+    console.log = function () {}
+    // console.log('set log to {}')
+
+    MyLambdaFunction['handler'](eventJSON, context, callback)
+    console.log = OriginalConsoleLog
+  }
+}
+
+function promptForSlot (prompt, slotname, slotvalue, callback) {
+  if (prompt) {
+    process.stdout.write('\x1b[34m' + slotname + ' \x1b[0m\x1b[32m [' + slotvalue + ']\x1b[0m: ')
+
+    // console.log('\x1b[34m%s :\x1b[0m\x1b[32m %s\x1b[0m ', slotname,  slotvalue  )
+
+    process.stdin.once('data', function (data) {
+      var answer = data.toString().trim()
+      // console.log(answer)
+      if (answer === '') {
+        if (slotvalue === '') {
+          // no default, user must type something
+          console.error('Error: No default slot value defined, user must type a slot value.')
+          process.exit()
+        } else {
+          answer = slotvalue
+        }
+      }
+
+      callback(answer)
+    })
+  } else {
+    if (options.slots) {
+      console.log('\x1b[34m%s :\x1b[0m\x1b[32m %s\x1b[0m ', slotname, slotvalue)
+    }
+
+    callback(slotvalue)
+  }
+}
+
+function callback (error, data) {
+  if (error) {
+    console.log('error: ' + error)
+  } else {
+    console.log(data)
+  }
+}
+
+function cleanArray (myArray) {
+  var cleanedArray = []
+
+  for (var i = 0; i < myArray.length; i++) {
+    if (myArray[i] !== '' && myArray[i].substring(0, 1) !== '#' && myArray[i].substring(0, 2) !== '//') {
+      cleanedArray.push(myArray[i])
+    }
+  }
+  return cleanedArray
+}
+//
+// const fontcolor = {
+//     Reset = '\x1b[0m',
+//     Bright = '\x1b[1m',
+//     Dim = '\x1b[2m',
+//     Underscore = '\x1b[4m',
+//     Blink = '\x1b[5m',
+//     Reverse = '\x1b[7m',
+//     Hidden = '\x1b[8m',
+//
+//     FgBlack = '\x1b[30m',
+//     FgRed = '\x1b[31m',
+//     FgGreen = '\x1b[32m',
+//     FgYellow = '\x1b[33m',
+//     FgBlue = '\x1b[34m',
+//     FgMagenta = '\x1b[35m',
+//     FgCyan = '\x1b[36m',
+//     FgWhite = '\x1b[37m',
+//
+//     BgBlack = '\x1b[40m',
+//     BgRed = '\x1b[41m',
+//     BgGreen = '\x1b[42m',
+//     BgYellow = '\x1b[43m',
+//     BgBlue = '\x1b[44m',
+//     BgMagenta = '\x1b[45m',
+//     BgCyan = '\x1b[46m',
+//     BgWhite = '\x1b[47m'
+// }