1# Copyright 2018 The Chromium OS Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5from autotest_lib.client.cros.update_engine import nebraska_wrapper 6from autotest_lib.client.cros.update_engine import update_engine_test 7 8class autoupdate_UrlSwitch(update_engine_test.UpdateEngineTest): 9 """Tests that we can continue with the second url when the first fails.""" 10 version = 1 11 12 def run_once(self, payload_url): 13 """ 14 Tests to see whether the update_engine can successfully switch to a 15 different URL if one fails. 16 17 @param image_url: The URL of the update payload. 18 19 """ 20 with nebraska_wrapper.NebraskaWrapper( 21 log_dir=self.resultsdir, payload_url=payload_url) as nebraska: 22 23 # Start the update that will return two Urls. This matches what test 24 # and production omaha does today. 25 self._check_for_update( 26 nebraska.get_update_url(failures_per_url=1, num_urls=2, 27 critical_update=True)) 28 self._wait_for_progress(0.2) 29 30 # Pull the network cable so the update fails. 31 self._disable_internet() 32 33 # It will retry 21 times before giving up. 34 self._wait_for_update_to_fail() 35 36 # Check that we are moving to the next Url. 37 self._enable_internet() 38 self._check_update_engine_log_for_entry( 39 'Reached max number of failures for Url', 40 raise_error=True) 41 42 # The next update attempt should resume and finish successfully. 43 self._check_for_update( 44 nebraska.get_update_url(critical_update=True)) 45 self._wait_for_update_to_complete() 46 self._check_update_engine_log_for_entry( 47 'Resuming an update that was previously started.', 48 raise_error=True) 49