Added test case and coverage

.eslintignore

@@ -1,4 +1,7 @@
 dist
 node_modules
 coverage
-build
+build
+.travis
+.nyc_output
+coverage

.gitignore

@@ -1,3 +1,5 @@
 node_modules
 .DS_store
-dist
+dist
+.nyc_output
+coverage

.prettierignore

@@ -3,4 +3,6 @@
 *.html
 /coverage
 *.md
-build
+build
+.nyc_output
+coverage

.travis.yml

@@ -0,0 +1,13 @@
+sudo: false
+language: node_js
+node_js:
+  - 12
+install:
+  - npm ci
+
+script:
+  - npm run lint
+  - npm run test:coverage
+
+notifications:
+  email: false

README.md

@@ -0,0 +1,112 @@
+[![License: ISC](https://img.shields.io/badge/License-ISC-blue.svg)](https://opensource.org/licenses/ISC) 
+[![1.0](https://badge.fury.io/js/survey-monkey-streams.svg)](//npmjs.com/package/react-js-css-loaders)
+
+# survey monkey oauth #
+Oauth2 authentication tools for SurveyMonkey
+## Quick overview ##
+### Step 1: Configuration setup ###
+```
+const lib = require('survey-monkey-oauth')({
+  clientId: process.env.clientId,
+  clientSecret: process.env.clientSecret,
+  baseURL: 'http://localhost:3000/', /* optional, default baseURL is http://localhost:3000/ */
+  redirectPath: '/callback/',  /* optional, default redirectPath is /callback/ */
+  scope: 'scopes',
+})
+```
+### Step 2: Routes configuration ###
+```
+  if (req.url.match(/login/)) return lib.authorize(req, res)
+  if (req.url.match(/callback/)) return lib.generateToken(req, res)
+```
+
+### Step 3: Listening for response ###
+```
+// on success
+lib.on('success', (tokenRes, res) => {
+  console.log('success !!!', tokenRes.data)
+  res.end('token successfully generated')
+})
+
+// on failure
+lib.on('error', (errorRes, res) => {
+  console.log('error', errorRes)
+})
+```
+### Usage ###  
+#### [Using native-addons](https://github.com/amareshsm/survey-monkey-oauth/tree/master/demo/native-api) ####
+```
+const http = require('http')
+const port = 3000
+const hostname = '127.0.0.1'
+const lib = require('survey-monkey-oauth')({
+  clientId: process.env.clientId,
+  clientSecret: process.env.clientSecret,
+  baseURL: 'http://localhost:3000/',  /* redirect url base */
+  redirectPath: '/callback/', /* redirect url pathname */
+  scope: '',  /* scopes to request permissions from app users during OAuth */
+})
+/* on success */
+lib.on('success', (tokenRes, res) => {
+  console.log('success !!!', tokenRes.data)
+  res.end('token successfully generated')
+})
+
+/* on failure */
+lib.on('error', (errorRes, res) => {
+  console.log('error', errorRes)
+})
+
+const server = http.createServer((req, res) => {
+  res.statusCode = 200
+  res.setHeader('Content-Type', 'text/plain')
+  if (req.url.match(/login/)) return lib.authorize(req, res) /* /login - initiates oauth authentication */
+  if (req.url.match(/callback/)) return lib.generateToken(req, res) /* /callback - initiates authorization process */
+})
+
+server.listen(port, hostname, () => {
+  console.log(`Server running at http://${hostname}:${port}/`)
+})
+```
+##### ***Note: redirectPath and callback route which initiates authorization process must be the same** #####
+#### [Using express](https://github.com/amareshsm/survey-monkey-oauth/tree/master/demo/express-framework)  ####
+```
+const express = require('express')
+const app = express()
+const port = 3000
+const lib = require('survey-monkey-oauth')({
+  clientId: process.env.clientId,
+  clientSecret: process.env.clientSecret,
+  baseURL: 'http://localhost:3000/',  /* redirect url base */
+  redirectPath: '/callback/', /* redirect url pathname */
+  scope: '',  /* scopes to request permissions from app users during OAuth */
+})
+
+// on success
+lib.on('success', (tokenRes, res) => {
+  console.log('success', tokenRes.data)
+  res.end('token successfully generated')
+})
+
+// on failure
+lib.on('error', (errorRes, res) => {
+  console.log('error', errorRes)
+})
+
+app.get('/', (req, res) => {
+  res.send('Hello World!')
+})
+app.get('/login/', (req, res) => {
+  lib.authorize(req, res)  /* /login - initiates oauth authentication */
+})
+app.get('/callback/', (req, res) => {
+  lib.generateToken(req, res)   /* /callback - initiates authorization process */
+})
+app.listen(port, () => {
+  console.log(`Example app listening at http://localhost:${port}`)
+})
+```
+### samples available under `/demo` : ###
+
+*  [using-node-native-addons](https://github.com/amareshsm/survey-monkey-oauth/tree/master/demo/native-api)
+*  [using-express-framework](https://github.com/amareshsm/survey-monkey-oauth/tree/master/demo/express-framework) 

demo/express-framework/index.js

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+const express = require('express')
+const app = express()
+const port = 3000
+const lib = require('survey-monkey-oauth')({
+  clientId: 'your client id',
+  clientSecret: 'your client secret',
+  baseURL: 'http://localhost:3000/',
+  redirectPath: '/callback/',
+  scope: '',
+})
+
+// on success
+lib.on('success', (tokenRes, res) => {
+  console.log('success', tokenRes.data)
+  res.end('token successfully generated')
+})
+
+// on failure
+lib.on('error', (errorRes, res) => {
+  console.log('error', errorRes)
+})
+
+app.get('/', (req, res) => {
+  res.send('Hello World!')
+})
+app.get('/login/', (req, res) => {
+  lib.authorize(req, res)
+})
+app.get('/callback/', (req, res) => {
+  lib.generateToken(req, res)
+})
+app.listen(port, () => {
+  console.log(`Example app listening at http://localhost:${port}`)
+})