title: How to pass an argument to an AndroidTestCase?
body: <p>I've implemented an Instrumentation and an AndroidTestCase.</p>
  
  <p>For my tests I need to connect to an external WIFI device. I want the testers to be able to specify an SSID for the test to use.</p>
  
  <p>Giving the the command line (adb shell am instrument ...) to run the test is not a problem, but how can I add the SSID to the command line and extract it in the code?</p>