title: How to write test cases for navigation drawer menu using espresso
body: <p>I am very new to espresso and am trying to write test cases for my android application. I searched on google to write test cases for navigation drawer menu. But in that am unable to import</p>
  
  <pre><code> import static android.support.test.espresso.contrib.DrawerActions.closeDrawer;
  import static android.support.test.espresso.contrib.DrawerActions.openDrawer;
  import static android.support.test.espresso.contrib.DrawerMatchers.isClosed;
  import static android.support.test.espresso.contrib.DrawerMatchers.isOpen;
  </code></pre>
  
  <p>so please help me from this. thanks in advance</p>