running jest tests using babel-jest preprocess

assets/js/components/WakaTime.jsx

@@ -15,7 +15,7 @@ var WakaTimeOriginal = require('../core/WakaTime');
 // Helpers
 var changeExtensionState = require('../helpers/changeExtensionState');
 
-var WakaTime = React.createClass({
+var Wakatime = React.createClass({
 
     getInitialState: function() {
         return {
@@ -170,4 +170,4 @@ var WakaTime = React.createClass({
 
 });
 
-module.exports = WakaTime;
+module.exports = Wakatime;

package.json

@@ -14,7 +14,7 @@
     "testFileExtensions": [
       "jest.js"
     ],
-    "scriptPreprocessor": "<rootDir>/tests/preprocesser.js",
+    "scriptPreprocessor": "<rootDir>/node_modules/babel-jest",
     "testDirectoryName": "tests",
     "unmockedModulePathPatterns": [
       "<rootDir>/node_modules/react"
@@ -22,6 +22,7 @@
   },
   "private": true,
   "devDependencies": {
+    "babel-jest": "^5.3.0",
     "bower": "^1.4.1",
     "chai": "^3.0.0",
     "del": "^1.2.0",

tests/preprocesser.js

@@ -1,7 +0,0 @@
-// preprocessor.js
-var ReactTools = require('react-tools');
-module.exports = {
-  process: function(src) {
-    return ReactTools.transform(src);
-  }
-};