Extension test case

Author: uttamukkoji

lib/stack/extension/index.js

@@ -8,7 +8,7 @@ import { createReadStream } from 'fs'
  * Extensions let you create custom fields and custom widgets that lets you customize Contentstack's default UI and behavior. Read more about <a href='https://www.contentstack.com/docs/developers/about-experience-extensions/'>Extensions</a>.
  */
 
-export function Extension (http, data) {
+export function Extension (http, data = {}) {
   this.stackHeaders = data.stackHeaders
   this.urlPath = `/extensions`
   if (data.extension) {
@@ -147,7 +147,7 @@ export function Extension (http, data) {
 }
 
 export function ExtensionCollection (http, data) {
-  const obj = cloneDeep(data.extensions)
+  const obj = cloneDeep(data.extensions) || []
   const extensionCollection = obj.map((extensiondata) => {
     return new Extension(http, { extension: extensiondata, stackHeaders: data.stackHeaders })
   })