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      1 # Copyright 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 import common
      6 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_constants
      7 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_errors
      8 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_test_base
      9 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     10         import connect_sequence
     11 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     12         import get_descriptors_sequence
     13 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
     14         import mbim_open_generic_sequence
     15 
     16 
     17 class cellular_MbimComplianceERR04(mbim_test_base.MbimTestBase):
     18     """
     19     Validation of discarding packets in case of an error.
     20 
     21     This test verifies that in case of an error message with status code
     22     MBIM_ERROR_FRAGMENT_OUT_OF_SEQUENCE all packets of the message caused the
     23     error are discarded by the function.
     24 
     25     Reference:
     26         [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 46
     27         http://www.usb.org/developers/docs/devclass_docs/MBIM-Compliance-1.0.pdf
     28 
     29     """
     30     version = 1
     31 
     32     def run_internal(self):
     33         """ Run ERR_04 test. """
     34         # Precondition
     35         descriptors = get_descriptors_sequence.GetDescriptorsSequence(
     36                 self.device_context).run()
     37         self.device_context.update_descriptor_cache(descriptors)
     38         open_sequence = mbim_open_generic_sequence.MBIMOpenGenericSequence(
     39                 self.device_context)
     40         open_sequence.run(max_control_transfer_size=64)
     41 
     42         # Step 1
     43         request_message, response_message, _ = (
     44                 connect_sequence.ConnectSequence(self.device_context).run(
     45                         introduce_error_in_packets_order=[1, 0, 2],
     46                         raise_exception_on_failure=False))
     47 
     48         # Step 2
     49         if ((response_message.transaction_id !=
     50              request_message.transaction_id) or
     51             (response_message.message_type ==
     52              mbim_constants.MBIM_COMMAND_DONE)):
     53             mbim_errors.log_and_raise(mbim_errors.MBIMComplianceAssertionError,
     54                                       'mbim1.0:9.3.4.2#3')
     55