tests/data/plugins/flt.utils.trimmer/bt_plugin_trimmer_test.py

   1 import bt2
   2
   3
   4 class TheIteratorOfAllEvil(bt2._UserMessageIterator):
   5     def __init__(self, config, port):
   6         tc, sc, ec1, ec2, params = port.user_data
   7         trace = tc()
   8         stream = trace.create_stream(sc)
   9
  10         if params['with-packet-msgs']:
  11             packet = stream.create_packet()
  12
  13         if params['with-stream-msgs-cs']:
  14             sb_msg = self._create_stream_beginning_message(stream, 100)
  15         else:
  16             sb_msg = self._create_stream_beginning_message(stream)
  17
  18         parent = packet if params['with-packet-msgs'] else stream
  19
  20         ev_msg1 = self._create_event_message(ec1, parent, 300)
  21         ev_msg2 = self._create_event_message(ec2, parent, 400)
  22
  23         if params['with-stream-msgs-cs']:
  24             se_msg = self._create_stream_end_message(stream, 1000)
  25         else:
  26             se_msg = self._create_stream_end_message(stream)
  27
  28         self._msgs = []
  29
  30         self._msgs.append(sb_msg)
  31
  32         if params['with-packet-msgs']:
  33             self._msgs.append(self._create_packet_beginning_message(packet, 200))
  34
  35         self._msgs.append(ev_msg1)
  36         self._msgs.append(ev_msg2)
  37
  38         if params['with-packet-msgs']:
  39             self._msgs.append(self._create_packet_end_message(packet, 900))
  40
  41         self._msgs.append(se_msg)
  42
  43         self._at = 0
  44         config.can_seek_forward = True
  45
  46     def _user_seek_beginning(self):
  47         self._at = 0
  48
  49     def __next__(self):
  50         if self._at < len(self._msgs):
  51             msg = self._msgs[self._at]
  52             self._at += 1
  53             return msg
  54         else:
  55             raise StopIteration
  56
  57
  58 @bt2.plugin_component_class
  59 class TheSourceOfAllEvil(
  60     bt2._UserSourceComponent, message_iterator_class=TheIteratorOfAllEvil
  61 ):
  62     def __init__(self, config, params, obj):
  63         tc = self._create_trace_class()
  64
  65         with_packets = bool(params['with-packet-msgs'])
  66
  67         # Use a clock class with an offset, so we can test with --begin or --end
  68         # smaller than this offset (in other words, a time that it's not
  69         # possible to represent with this clock class).
  70         cc = self._create_clock_class(frequency=1, offset=bt2.ClockClassOffset(10000))
  71         sc = tc.create_stream_class(
  72             default_clock_class=cc,
  73             supports_packets=with_packets,
  74             packets_have_beginning_default_clock_snapshot=with_packets,
  75             packets_have_end_default_clock_snapshot=with_packets,
  76         )
  77         ec1 = sc.create_event_class(name='event 1')
  78         ec2 = sc.create_event_class(name='event 2')
  79         self._add_output_port('out', (tc, sc, ec1, ec2, params))
  80
  81
  82 bt2.register_plugin(__name__, 'test-trimmer')