+import bt2
+
+
+class TheIteratorOfAllEvil(bt2._UserMessageIterator):
+ def __init__(self, port):
+ tc, sc, ec1, ec2, params = port.user_data
+ trace = tc()
+ stream = trace.create_stream(sc)
+
+ # Test with and without packets, once packets are optional.
+ packet = stream.create_packet()
+
+ if params['with-stream-msgs-cs']:
+ sb_msg = self._create_stream_beginning_message(stream, 100)
+ else:
+ sb_msg = self._create_stream_beginning_message(stream)
+
+ ev_msg1 = self._create_event_message(ec1, packet, 300)
+ ev_msg2 = self._create_event_message(ec2, packet, 400)
+
+ if params['with-stream-msgs-cs']:
+ se_msg = self._create_stream_end_message(stream, 1000)
+ else:
+ se_msg = self._create_stream_end_message(stream)
+
+ self._msgs = [
+ sb_msg,
+ self._create_packet_beginning_message(packet, 200),
+ ev_msg1,
+ ev_msg2,
+ self._create_packet_end_message(packet, 900),
+ se_msg,
+ ]
+ self._at = 0
+
+ def _seek_beginning(self):
+ self._at = 0
+
+ def __next__(self):
+ if self._at < len(self._msgs):
+ msg = self._msgs[self._at]
+ self._at += 1
+ return msg
+ else:
+ raise StopIteration
+
+@bt2.plugin_component_class
+class TheSourceOfAllEvil(bt2._UserSourceComponent,
+ message_iterator_class=TheIteratorOfAllEvil):
+ def __init__(self, params):
+ tc = self._create_trace_class()
+
+ # Use a clock class with an offset, so we can test with --begin or --end
+ # smaller than this offset (in other words, a time that it's not
+ # possible to represent with this clock class).
+ cc = self._create_clock_class(frequency=1, offset=bt2.ClockClassOffset(10000))
+ sc = tc.create_stream_class(default_clock_class=cc,
+ packets_have_beginning_default_clock_snapshot=True,
+ packets_have_end_default_clock_snapshot=True)
+ ec1 = sc.create_event_class(name='event 1')
+ ec2 = sc.create_event_class(name='event 2')
+ self._add_output_port('out', (tc, sc, ec1, ec2, params))
+
+
+bt2.register_plugin(__name__, 'test-trimmer')