commit 8bded2b0d37a2711c343f3c5cb1ae97e04ea199d
author Thieu Le <thieule@chromium.org> Wed Sep 03 15:38:46 2014 -0700
committer chrome-internal-fetch <chrome-internal-fetch@google.com> Thu Sep 04 15:49:16 2014 +0000
tree 32246084a322cae373417f21b31aa37b980f2be5
parent 2529509a4310df0d7ebb95da29810b1f455bea8b

cellular: Verify backchannel uses ethernet

BUG=chromium:403168
TEST=network_3GSmokeTest

Change-Id: I495498d01b87aed024d507db1172b45b2c7a1d73
Reviewed-on: https://chromium-review.googlesource.com/216219
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Thieu Le <thieule@chromium.org>
Commit-Queue: Thieu Le <thieule@chromium.org>

client/cros/cellular/test_environment.py

diff --git a/client/cros/cellular/test_environment.py b/client/cros/cellular/test_environment.py
index 9340c61..76c6bcc 100644
--- a/client/cros/cellular/test_environment.py
+++ b/client/cros/cellular/test_environment.py
@@ -156,8 +156,9 @@
         @raise error.TestError if backchannel is not on an ethernet device.
 
         """
-        # TODO: Implement this (crbug.com/403168).
-        pass
+        if not backchannel.is_backchannel_using_ethernet():
+            raise error.TestError('An ethernet connection is required between '
+                                  'the test server and the device under test.')
 
 
     def _verify_sim(self):