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      1 # Copyright (c) 2014 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 """
      6 CM_04 Validation of |transaction_id| in Modem's Response to MBIM_COMMAND_MSG
      7 
      8 Reference:
      9     [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 38
     10         http://www.usb.org/developers/docs/devclass_docs/MBIM-Compliance-1.0.pdf
     11 """
     12 import common
     13 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_errors
     14 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     15         import mbim_cid_device_caps_sequence
     16 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     17         import mbim_open_generic_sequence
     18 from autotest_lib.client.cros.cellular.mbim_compliance.tests import test
     19 
     20 
     21 class CM04Test(test.Test):
     22     """ Implement the CM_04 test. """
     23 
     24     def run_internal(self):
     25         """ Run CM_04 test. """
     26         # Precondition
     27         mbim_open_generic_sequence.MBIMOpenGenericSequence(
     28                 self.test_context).run()
     29 
     30         # Step 1
     31         command_message, response_message = (
     32                 mbim_cid_device_caps_sequence.MBIMCIDDeviceCapsSequence(
     33                         self.test_context).run())
     34         # Validate |transaction_id| in the response to MBIM_COMMAND_MSG.
     35         if response_message.transaction_id != command_message.transaction_id:
     36             mbim_errors.log_and_raise(mbim_errors.MBIMComplianceAssertionError,
     37                                       'mbim1.0:9.4.3')
     38