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
5import common
6from autotest_lib.client.cros.cellular.mbim_compliance import mbim_errors
7from autotest_lib.client.cros.cellular.mbim_compliance \
8        import mbim_test_base
9from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
10        import get_descriptors_sequence
11from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
12        import mbim_cid_device_caps_sequence
13from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
14        import mbim_open_generic_sequence
15
16
17class cellular_MbimComplianceCM04(mbim_test_base.MbimTestBase):
18    """
19    CM_04 Validation of |transaction_id| in modem's response to MBIM_COMMAND_MSG
20
21    This section contains tests that validate the specifics of MBIM_COMMAND_MSG
22    request and the function's response.
23
24    Reference:
25        [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 38
26        http://www.usb.org/developers/docs/devclass_docs/MBIM-Compliance-1.0.pdf
27    """
28    version = 1
29
30    def run_internal(self):
31        """ Run CM_04 test. """
32        # Precondition
33        descriptors = get_descriptors_sequence.GetDescriptorsSequence(
34                self.device_context).run()
35        self.device_context.update_descriptor_cache(descriptors)
36        mbim_open_generic_sequence.MBIMOpenGenericSequence(
37                self.device_context).run()
38
39        # Step 1
40        command_message, response_message = (
41                mbim_cid_device_caps_sequence.MBIMCIDDeviceCapsSequence(
42                        self.device_context).run())
43        # Validate |transaction_id| in the response to MBIM_COMMAND_MSG.
44        if response_message.transaction_id != command_message.transaction_id:
45            mbim_errors.log_and_raise(mbim_errors.MBIMComplianceAssertionError,
46                                      'mbim1.0:9.4.3')
47