Bug 1068489 - Robocop: Provide error message where device screen may be sleeping, r=nalexander

mobile/android/base/tests/BaseRobocopTest.java

@@ -15,6 +15,8 @@ import org.mozilla.gecko.FennecTalosAssert;
 import org.mozilla.gecko.AppConstants;
 
 import android.app.Activity;
+import android.content.Context;
+import android.os.PowerManager;
 import android.test.ActivityInstrumentationTestCase2;
 import android.util.Log;
 
@@ -107,4 +109,13 @@ public abstract class BaseRobocopTest extends ActivityInstrumentationTestCase2<A
         mAsserter.setLogFile(mLogFile);
         mAsserter.setTestName(getClass().getName());
     }
+
+    /**
+     * Ensure that the screen on the test device is powered on during tests.
+     */
+    public void throwIfScreenNotOn() {
+        final PowerManager pm = (PowerManager) getActivity().getSystemService(Context.POWER_SERVICE);
+        mAsserter.ok(pm.isScreenOn(),
+            "Robocop tests need the test device screen to be powered on.", "");
+    }
 }

mobile/android/base/tests/BaseTest.java

@@ -121,6 +121,9 @@ abstract class BaseTest extends BaseRobocopTest {
         mActions = new FennecNativeActions(mActivity, mSolo, getInstrumentation(), mAsserter);
         mDevice = new Device();
         mDatabaseHelper = new DatabaseHelper(mActivity, mAsserter);
+
+        // Ensure Robocop tests are run with Display powered on.
+        throwIfScreenNotOn();
     }
 
     protected void initializeProfile() {

mobile/android/base/tests/UITest.java

@@ -74,6 +74,9 @@ abstract class UITest extends BaseRobocopTest
         // Helpers depend on components so initialize them first.
         initComponents();
         initHelpers();
+
+        // Ensure Robocop tests are run with Display powered on.
+        throwIfScreenNotOn();
     }
 
     @Override