+def _create_stream(tc, ctx_field_classes):
+ packet_context_fc = tc.create_structure_field_class()
+ for name, fc in ctx_field_classes:
+ packet_context_fc.append_member(name, fc)
+
+ trace = tc()
+ stream_class = tc.create_stream_class(
+ packet_context_field_class=packet_context_fc, supports_packets=True
+ )
+
+ stream = trace.create_stream(stream_class)
+ return stream
+
+
+def _create_const_field_class(tc, field_class, value_setter_fn):
+ field_name = 'const field'
+
+ class MyIter(bt2._UserMessageIterator):
+ def __init__(self, config, self_port_output):
+ nonlocal field_class
+ nonlocal value_setter_fn
+ stream = _create_stream(tc, [(field_name, field_class)])
+ packet = stream.create_packet()
+
+ value_setter_fn(packet.context_field[field_name])
+
+ self._msgs = [
+ self._create_stream_beginning_message(stream),
+ self._create_packet_beginning_message(packet),
+ ]
+
+ def __next__(self):
+ if len(self._msgs) == 0:
+ raise StopIteration
+
+ return self._msgs.pop(0)
+
+ class MySrc(bt2._UserSourceComponent, message_iterator_class=MyIter):
+ def __init__(self, config, params, obj):
+ self._add_output_port('out', params)
+
+ graph = bt2.Graph()
+ src_comp = graph.add_component(MySrc, 'my_source', None)
+ msg_iter = TestOutputPortMessageIterator(graph, src_comp.output_ports['out'])
+
+ # Ignore first message, stream beginning
+ _ = next(msg_iter)
+ packet_beg_msg = next(msg_iter)
+
+ return packet_beg_msg.packet.context_field[field_name].cls
+
+
+class _TestFieldClass:
+ def test_create_user_attributes(self):
+ fc = self._create_default_field_class(user_attributes={'salut': 23})
+ self.assertEqual(fc.user_attributes, {'salut': 23})
+ self.assertIs(type(fc.user_attributes), bt2_value.MapValue)
+
+ def test_const_create_user_attributes(self):
+ fc = self._create_default_const_field_class(user_attributes={'salut': 23})
+ self.assertEqual(fc.user_attributes, {'salut': 23})
+ self.assertIs(type(fc.user_attributes), bt2_value._MapValueConst)
+
+ def test_create_invalid_user_attributes(self):
+ with self.assertRaises(TypeError):
+ self._create_default_field_class(user_attributes=object())
+
+ def test_create_invalid_user_attributes_value_type(self):
+ with self.assertRaises(TypeError):
+ self._create_default_field_class(user_attributes=23)
+
+
+class BoolFieldClassTestCase(_TestFieldClass, unittest.TestCase):
+ @staticmethod
+ def _const_value_setter(field):
+ field = False
+
+ def _create_default_field_class(self, **kwargs):
+ tc = get_default_trace_class()
+ return tc.create_bool_field_class(**kwargs)
+
+ def _create_default_const_field_class(self, *args, **kwargs):
+ tc = get_default_trace_class()
+ fc = tc.create_bool_field_class(*args, **kwargs)
+ return _create_const_field_class(tc, fc, self._const_value_setter)
+