title: Confused about testCompile and androidTestCompile in Android Gradle
body: <p>I'm new to testing world and even more to Android testing world. While doing research on Robolectric that aids with tests on android one thing confuses me the most. Sometimes on the web I see people using <code>testCompile</code> keyword in dependencies of the gradle build script when referencing Robolectric while others use <code>androidTestCompile</code>. Certainly both can't be valid?</p>
  
  <p>Can somebody explain the difference between the both and which of these should be the one used when using Robolectric?</p>