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, port):
   6         tc, sc, ec1, ec2, params = port.user_data
   7         trace = tc()
   8         stream = trace.create_stream(sc)
   9
  10         # Test with and without packets, once packets are optional.
  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         ev_msg1 = self._create_event_message(ec1, packet, 300)
  19         ev_msg2 = self._create_event_message(ec2, packet, 400)
  20
  21         if params['with-stream-msgs-cs']:
  22             se_msg = self._create_stream_end_message(stream, 1000)
  23         else:
  24             se_msg = self._create_stream_end_message(stream)
  25
  26         self._msgs = [
  27             sb_msg,
  28             self._create_packet_beginning_message(packet, 200),
  29             ev_msg1,
  30             ev_msg2,
  31             self._create_packet_end_message(packet, 900),
  32             se_msg,
  33         ]
  34         self._at = 0
  35
  36     def _seek_beginning(self):
  37         self._at = 0
  38
  39     def __next__(self):
  40         if self._at < len(self._msgs):
  41             msg = self._msgs[self._at]
  42             self._at += 1
  43             return msg
  44         else:
  45             raise StopIteration
  46
  47 @bt2.plugin_component_class
  48 class TheSourceOfAllEvil(bt2._UserSourceComponent,
  49         message_iterator_class=TheIteratorOfAllEvil):
  50     def __init__(self, params):
  51         tc = self._create_trace_class()
  52
  53         # Use a clock class with an offset, so we can test with --begin or --end
  54         # smaller than this offset (in other words, a time that it's not
  55         # possible to represent with this clock class).
  56         cc = self._create_clock_class(frequency=1, offset=bt2.ClockClassOffset(10000))
  57         sc = tc.create_stream_class(default_clock_class=cc,
  58                                     supports_packets=True,
  59                                     packets_have_beginning_default_clock_snapshot=True,
  60                                     packets_have_end_default_clock_snapshot=True)
  61         ec1 = sc.create_event_class(name='event 1')
  62         ec2 = sc.create_event_class(name='event 2')
  63         self._add_output_port('out', (tc, sc, ec1, ec2, params))
  64
  65
  66 bt2.register_plugin(__name__, 'test-trimmer')