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      1 # Copyright (c) 2013 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 
      5 import logging
      6 import time
      7 
      8 from autotest_lib.client.common_lib.cros.network import xmlrpc_datatypes
      9 from autotest_lib.server.cros.network import wifi_cell_test_base
     10 
     11 class network_WiFi_RoamSuspendSSID(wifi_cell_test_base.WiFiCellTestBase):
     12     """Tests roaming to a new SSID when a previous SSID disappears in suspend.
     13 
     14     This test:
     15     1) Connects the DUT to a network A
     16     2) Connects the DUT to a network B while keeping network A around.
     17     3) Suspend the DUT (while connected to network B).
     18     4) Deconfigure (take down) network B.
     19     5) Assert that the DUT automatically connects to network A on resume.
     20 
     21     """
     22 
     23     version = 1
     24 
     25     SUSPEND_TIME_SECONDS = 15
     26 
     27 
     28     def parse_additional_arguments(self, commandline_args, additional_params):
     29         """Hook into super class to take control files parameters.
     30 
     31         @param commandline_args: dict of parsed parameters from the autotest.
     32         @param additional_params: tuple(HostapConfig, HostapConfig) used as
     33                 networks A and B from the test description.
     34 
     35         """
     36         self._ap_config0 = additional_params[0]
     37         self._ap_config1 = additional_params[1]
     38 
     39 
     40     def run_once(self):
     41         """Test body."""
     42         get_client_config = lambda ssid, ap_config: \
     43                 xmlrpc_datatypes.AssociationParameters(
     44                         ssid=ssid,
     45                         security_config=ap_config.security_config)
     46         self.context.configure(self._ap_config0)
     47         self.context.configure(self._ap_config1, multi_interface=True)
     48         self.context.assert_connect_wifi(
     49                 get_client_config(self.context.router.get_ssid(instance=0),
     50                                   self._ap_config0))
     51         self.context.assert_connect_wifi(
     52                 get_client_config(self.context.router.get_ssid(instance=1),
     53                                   self._ap_config1))
     54         self.context.client.do_suspend_bg(self.SUSPEND_TIME_SECONDS + 5)
     55         logging.info('Waiting %d seconds for DUT to be fully suspended.',
     56                      self.SUSPEND_TIME_SECONDS)
     57         time.sleep(self.SUSPEND_TIME_SECONDS)
     58         logging.info('Tearing down the most recently connected AP.')
     59         self.context.router.deconfig_aps(instance=1)
     60         logging.info('Expect that we connect to our previous connected AP '
     61                      'on resume.')
     62         self.context.wait_for_connection(
     63                 self.context.router.get_ssid(instance=0),
     64                 self._ap_config0.frequency)
     65