Is device deployment enough to simulate application update?
<p>The application update process via app store (on the device by a lambda user) is not very well documented. I've sum up all this to these questions :</p>

<ul>
<li>what happens when the user updates his app? Is everything erased, or just some part of the app?</li>
<li>so what is kept, what is not kept?</li>
<li>how to test the application update in a development environment ?</li>
</ul>
