Android Unit test API calls with Retrofit2
<p>I haven't done any testing in Android, so please bear with me if this seems a stupid question.
I'm developing an app which makes a lot of network calls from a restful API service. To make the network calls, I'm using <code>Retrofit2</code> and <code>RxJava</code>.</p>

<p>What would be the best practice/framework to just test if these calls are working? I've started to read the Google Codelab for <a href="https://codelabs.developers.google.com" rel="nofollow">testing</a> which uses <code>Junit4</code> and <code>Mockito</code>, but I don't want to do any clicking in the UI to start a test currently, just checking for different API versions which calls are supported or not.</p>