1# Copyright 2015 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 \
7        import mbim_command_message
8from autotest_lib.client.cros.cellular.mbim_compliance import mbim_errors
9from autotest_lib.client.cros.cellular.mbim_compliance import mbim_test_base
10from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
11        import get_descriptors_sequence
12from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
13        import mbim_cid_device_caps_sequence
14from autotest_lib.client.cros.cellular.mbim_compliance.sequences \
15        import mbim_open_generic_sequence
16
17
18class cellular_MbimComplianceCM15(mbim_test_base.MbimTestBase):
19    """
20    CM_15 Validation of message fragmentation ability.
21
22    This test verifies that the function follows the rules of control message
23    fragmentation.
24
25    Reference:
26        [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 43
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 CM_15 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        caps_sequence = mbim_cid_device_caps_sequence.MBIMCIDDeviceCapsSequence(
44                self.device_context)
45        _, response_message = caps_sequence.run()
46        if not isinstance(response_message,
47                          mbim_command_message.MBIMDeviceCapsInfo):
48            mbim_errors.log_and_raise(mbim_errors.MBIMComplianceAssertionError,
49                                      'mbim1.0:9.2')
50