title: How to use the AndroidTestCase file?
body: <p>I'm working on some stuff and some nice guy give me these <a href="https://android.googlesource.com/platform/cts/+/jb-mr2-release/tests/tests/media/src/android/media/cts/EncoderTest.java" rel="nofollow">link</a>. It is an AndroidTestCase file. I've done some seach, it seems that this has something to do with the TestSuit. I also read stuff about the android test frame. But there is no clear information about how could I build a test based on this AndroidTest file. Can anyone give me a hint?</p>
  
  <p>Thank you!</p>