self._msgs = [
self._create_stream_beginning_message(stream),
- self._create_stream_activity_beginning_message(stream),
self._create_packet_beginning_message(packet),
event_message,
event_message,
class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter):
def __init__(self, params):
tc = self._create_trace_class()
- sc = tc.create_stream_class()
+ sc = tc.create_stream_class(supports_packets=True)
ec = sc.create_event_class()
self._add_output_port('out', (tc, sc, ec))
it = graph.create_output_port_message_iterator(src.output_ports['out'])
# Skip beginning messages.
- next(it)
- next(it)
- next(it)
+ msg = next(it)
+ self.assertIsInstance(msg, bt2.message._StreamBeginningMessage)
+ msg = next(it)
+ self.assertIsInstance(msg, bt2.message._PacketBeginningMessage)
msg_ev1 = next(it)
msg_ev2 = next(it)
self.assertIsInstance(msg_ev2, bt2.message._EventMessage)
self.assertEqual(msg_ev1.addr, msg_ev2.addr)
+ @staticmethod
+ def _setup_seek_beginning_test():
+ # Use a source, a filter and an output port iterator. This allows us
+ # to test calling `seek_beginning` on both a _OutputPortMessageIterator
+ # and a _UserComponentInputPortMessageIterator, on top of checking that
+ # _UserMessageIterator._seek_beginning is properly called.
+
+ class MySourceIter(bt2._UserMessageIterator):
+ def __init__(self, port):
+ tc, sc, ec = port.user_data
+ trace = tc()
+ stream = trace.create_stream(sc)
+ packet = stream.create_packet()
+
+ self._msgs = [
+ self._create_stream_beginning_message(stream),
+ self._create_packet_beginning_message(packet),
+ self._create_event_message(ec, packet),
+ self._create_event_message(ec, packet),
+ self._create_packet_end_message(packet),
+ self._create_stream_end_message(stream),
+ ]
+ 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
+
+ class MySource(bt2._UserSourceComponent,
+ message_iterator_class=MySourceIter):
+ def __init__(self, params):
+ tc = self._create_trace_class()
+ sc = tc.create_stream_class(supports_packets=True)
+ ec = sc.create_event_class()
+
+ self._add_output_port('out', (tc, sc, ec))
+
+ class MyFilterIter(bt2._UserMessageIterator):
+ def __init__(self, port):
+ input_port = port.user_data
+ self._upstream_iter = input_port.create_message_iterator()
+
+ def __next__(self):
+ return next(self._upstream_iter)
+
+ def _seek_beginning(self):
+ self._upstream_iter.seek_beginning()
+
+ @property
+ def _can_seek_beginning(self):
+ return self._upstream_iter.can_seek_beginning
+
+ class MyFilter(bt2._UserFilterComponent, message_iterator_class=MyFilterIter):
+ def __init__(self, params):
+ input_port = self._add_input_port('in')
+ self._add_output_port('out', input_port)
+
+
+ graph = bt2.Graph()
+ src = graph.add_component(MySource, 'src')
+ flt = graph.add_component(MyFilter, 'flt')
+ graph.connect_ports(src.output_ports['out'], flt.input_ports['in'])
+ it = graph.create_output_port_message_iterator(flt.output_ports['out'])
+
+ return it, MySourceIter
+
+ def test_can_seek_beginning(self):
+ it, MySourceIter = self._setup_seek_beginning_test()
+
+ def _can_seek_beginning(self):
+ nonlocal can_seek_beginning
+ return can_seek_beginning
+
+ MySourceIter._can_seek_beginning = property(_can_seek_beginning)
+
+ can_seek_beginning = True
+ self.assertTrue(it.can_seek_beginning)
+
+ can_seek_beginning = False
+ self.assertFalse(it.can_seek_beginning)
+
+ # Once can_seek_beginning returns an error, verify that it raises when
+ # _can_seek_beginning has/returns the wrong type.
+
+ # Remove the _can_seek_beginning method, we now rely on the presence of
+ # a _seek_beginning method to know whether the iterator can seek to
+ # beginning or not.
+ del MySourceIter._can_seek_beginning
+ self.assertTrue(it.can_seek_beginning)
+
+ del MySourceIter._seek_beginning
+ self.assertFalse(it.can_seek_beginning)
+
+ def test_seek_beginning(self):
+ it, MySourceIter = self._setup_seek_beginning_test()
+
+ msg = next(it)
+ self.assertIsInstance(msg, bt2.message._StreamBeginningMessage)
+ msg = next(it)
+ self.assertIsInstance(msg, bt2.message._PacketBeginningMessage)
+
+ it.seek_beginning()
+
+ msg = next(it)
+ self.assertIsInstance(msg, bt2.message._StreamBeginningMessage)
+
+ # Verify that we can seek beginning after having reached the end.
+ #
+ # It currently does not work to seek an output port message iterator
+ # once it's ended, but we should eventually make it work and uncomment
+ # the following snippet.
+ #
+ # try:
+ # while True:
+ # next(it)
+ # except bt2.Stop:
+ # pass
+ #
+ # it.seek_beginning()
+ # msg = next(it)
+ # self.assertIsInstance(msg, bt2.message._StreamBeginningMessage)
+
+ def test_seek_beginning_user_error(self):
+ it, MySourceIter = self._setup_seek_beginning_test()
+
+ def _seek_beginning_error(self):
+ raise ValueError('ouch')
+
+ MySourceIter._seek_beginning = _seek_beginning_error
+
+ with self.assertRaises(bt2.Error):
+ it.seek_beginning()
+
+
class OutputPortMessageIteratorTestCase(unittest.TestCase):
def test_component(self):
self._add_output_port('out')
trace_class = self._create_trace_class()
- stream_class = trace_class.create_stream_class()
+ stream_class = trace_class.create_stream_class(supports_packets=True)
# Create payload field class
my_int_ft = trace_class.create_signed_integer_field_class(32)
self.assertEqual(msg.event.cls.name, 'salut')
field = msg.event.payload_field['my_int']
self.assertEqual(field, at * 3)
+
+if __name__ == '__main__':
+ unittest.main()
projects / babeltrace.git / blobdiff