tests/bindings/python/bt2/test_connection.py

   1 #
   2 # Copyright (C) 2019 EfficiOS Inc.
   3 #
   4 # This program is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU General Public License
   6 # as published by the Free Software Foundation; only version 2
   7 # of the License.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17 #
  18
  19 import unittest
  20 import bt2
  21
  22
  23 class ConnectionTestCase(unittest.TestCase):
  24     def test_create(self):
  25         class MyIter(bt2._UserMessageIterator):
  26             def __next__(self):
  27                 raise bt2.Stop
  28
  29         class MySource(bt2._UserSourceComponent,
  30                        message_iterator_class=MyIter):
  31             def __init__(self, params):
  32                 self._add_output_port('out')
  33
  34         class MySink(bt2._UserSinkComponent):
  35             def __init__(self, params):
  36                 self._add_input_port('in')
  37
  38             def _consume(self):
  39                 raise bt2.Stop
  40
  41         graph = bt2.Graph()
  42         src = graph.add_component(MySource, 'src')
  43         sink = graph.add_component(MySink, 'sink')
  44         conn = graph.connect_ports(src.output_ports['out'],
  45                                    sink.input_ports['in'])
  46         self.assertIsInstance(conn, bt2._Connection)
  47
  48     def test_downstream_port(self):
  49         class MyIter(bt2._UserMessageIterator):
  50             def __next__(self):
  51                 raise bt2.Stop
  52
  53         class MySource(bt2._UserSourceComponent,
  54                        message_iterator_class=MyIter):
  55             def __init__(self, params):
  56                 self._add_output_port('out')
  57
  58         class MySink(bt2._UserSinkComponent):
  59             def __init__(self, params):
  60                 self._add_input_port('in')
  61
  62             def _consume(self):
  63                 raise bt2.Stop
  64
  65         graph = bt2.Graph()
  66         src = graph.add_component(MySource, 'src')
  67         sink = graph.add_component(MySink, 'sink')
  68         conn = graph.connect_ports(src.output_ports['out'],
  69                                    sink.input_ports['in'])
  70         self.assertEqual(conn.downstream_port.addr, sink.input_ports['in'].addr)
  71
  72     def test_upstream_port(self):
  73         class MyIter(bt2._UserMessageIterator):
  74             def __next__(self):
  75                 raise bt2.Stop
  76
  77         class MySource(bt2._UserSourceComponent,
  78                        message_iterator_class=MyIter):
  79             def __init__(self, params):
  80                 self._add_output_port('out')
  81
  82         class MySink(bt2._UserSinkComponent):
  83             def __init__(self, params):
  84                 self._add_input_port('in')
  85
  86             def _consume(self):
  87                 raise bt2.Stop
  88
  89         graph = bt2.Graph()
  90         src = graph.add_component(MySource, 'src')
  91         sink = graph.add_component(MySink, 'sink')
  92         conn = graph.connect_ports(src.output_ports['out'],
  93                                    sink.input_ports['in'])
  94         self.assertEqual(conn.upstream_port.addr, src.output_ports['out'].addr)