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      1 # Copyright (c) 2012 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 dbus
      6 import logging
      7 import time
      8 
      9 from autotest_lib.client.bin import test
     10 from autotest_lib.client.common_lib import error
     11 from autotest_lib.client.cros.networking import shill_context
     12 from autotest_lib.client.cros.networking import shill_proxy
     13 
     14 
     15 class network_3GStressEnable(test.test):
     16     """
     17     Stress-tests enabling and disabling a technology at short intervals.
     18 
     19     """
     20     version = 1
     21 
     22     okerrors = [
     23         shill_proxy.ShillProxy.ERROR_IN_PROGRESS
     24     ]
     25 
     26     def _enable_device(self, enable):
     27         try:
     28             timeout = shill_proxy.ShillProxy.DEVICE_ENABLE_DISABLE_TIMEOUT
     29             if enable:
     30                 self.device.Enable(timeout=timeout)
     31             else:
     32                 self.device.Disable(timeout=timeout)
     33         except dbus.exceptions.DBusException, err:
     34             if err.get_dbus_name() in network_3GStressEnable.okerrors:
     35                 return
     36             raise error.TestFail(err)
     37 
     38 
     39     def _test(self, settle):
     40         self._enable_device(False)
     41         time.sleep(settle)
     42         self._enable_device(True)
     43         time.sleep(settle)
     44 
     45 
     46     def run_once(self, test_env, cycles=3, min=15, max=25):
     47         with test_env, shill_context.ServiceAutoConnectContext(
     48                 test_env.shill.find_cellular_service_object, False):
     49             self.device = test_env.shill.find_cellular_device_object()
     50             for t in xrange(max, min, -1):
     51                 for n in xrange(cycles):
     52                     # deciseconds are an awesome unit.
     53                     logging.info('Cycle %d: %f seconds delay.', n, t / 10.0)
     54                     self._test(t / 10.0)
     55             logging.info('Done.')
     56