add and setup jest for tests

Author: jscottsmith

.babelrc

@@ -0,0 +1,7 @@
+{
+	"env": {
+	    "test": {
+			"presets": [ "es2015", "react", "stage-0" ]
+		}
+	}
+}

.eslintrc

@@ -1,6 +1,8 @@
 {
   "globals" : {
     "ParallaxScrollListener": true,
+    "test": true,
+    "expect": true
   },
   "ecmaFeatures": {
     "arrowFunctions": true,

package.json

@@ -10,7 +10,11 @@
   "scripts": {
     "dev": "webpack --progress --colors --watch",
     "dev-server": "node ./examples/parallax-example/dist/server",
-    "gh-pages": "NODE_ENV=production webpack --progress --colors"
+    "gh-pages": "NODE_ENV=production webpack --progress --colors",
+    "test": "jest"
+  },
+  "jest": {
+    "modulePaths": ["<rootDir>/src/"]
   },
   "keywords": [
     "react",
@@ -27,17 +31,21 @@
   },
   "devDependencies": {
     "babel-core": "^6.23.1",
+    "babel-jest": "^20.0.3",
     "babel-loader": "^6.3.2",
     "babel-preset-env": "^1.1.8",
+    "babel-preset-es2015": "^6.24.1",
     "babel-preset-react": "^6.23.0",
     "babel-preset-stage-0": "^6.24.1",
     "cross-env": "^3.1.4",
     "css-loader": "^0.28.0",
     "express": "^4.14.1",
     "file-loader": "^0.11.1",
+    "jest": "^20.0.4",
     "node-sass": "^4.5.0",
     "postcss-loader": "^1.3.3",
     "raw-loader": "^0.5.1",
+    "regenerator-runtime": "^0.10.5",
     "sass-loader": "^6.0.3",
     "style-loader": "^0.16.1",
     "url-loader": "^0.5.8",