add use case of imports in different files on test_app

test_app/app/js/app.js

@@ -1,11 +1,20 @@
 import { Component } from 'react';
+import SimpleStorage from 'Embark/contracts/SimpleStorage';
+window.SimpleStorage = SimpleStorage;
 
 class App extends Component {
+  action() {
+    console.log("calling...")
+    SimpleStorage.methods.get().call(function(err, value) {
+      alert(value);
+    })
+  }
+
   render() {
     return (
       <div className="App">
         <header className="App-header">
-          <h1 className="App-title">Welcome to React</h1>
+          <h1 className="App-title" onClick={() => this.action() }>Welcome to React</h1>
         </header>
         <p className="App-intro">
           To get started, edit <code>src/App.js</code> and save to reload.

test_app/app/js/index.js

@@ -21,7 +21,7 @@ import 'bootstrap/dist/css/bootstrap-theme.css';
 import { Navbar, Jumbotron, Button } from 'react-bootstrap';
 
 window.EmbarkJS = EmbarkJS;
-window.SimpleStorage = SimpleStorage;
+//window.SimpleStorage = SimpleStorage;
 window.Test = Test;
 window.Assert = Assert;