title: android espresso: running test from command line
body: <p>I have a test.espresso package with all the test classes.
  I am trying to run a single test class from the command line, however it ends up running all the test classes. </p>
  
  <p>adb shell am instrument -w \
  com.demo.app.test/android.support.test.runner.AndroidJUnitRunner</p>
  
  <p>How do I just run a single test class. I want to use bamboo(which is like jenkins) to run all the test classes individually in separate jobs.</p>