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 from bt2 import connection as bt2_connection
  22
  23
  24 class ConnectionTestCase(unittest.TestCase):
  25     def test_create(self):
  26         class MyIter(bt2._UserMessageIterator):
  27             def __next__(self):
  28                 raise bt2.Stop
  29
  30         class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter):
  31             def __init__(self, params, obj):
  32                 self._add_output_port('out')
  33
  34         class MySink(bt2._UserSinkComponent):
  35             def __init__(self, params, obj):
  36                 self._add_input_port('in')
  37
  38             def _user_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'], sink.input_ports['in'])
  45         self.assertIs(type(conn), bt2_connection._ConnectionConst)
  46
  47     def test_downstream_port(self):
  48         class MyIter(bt2._UserMessageIterator):
  49             def __next__(self):
  50                 raise bt2.Stop
  51
  52         class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter):
  53             def __init__(self, params, obj):
  54                 self._add_output_port('out')
  55
  56         class MySink(bt2._UserSinkComponent):
  57             def __init__(self, params, obj):
  58                 self._add_input_port('in')
  59
  60             def _user_consume(self):
  61                 raise bt2.Stop
  62
  63         graph = bt2.Graph()
  64         src = graph.add_component(MySource, 'src')
  65         sink = graph.add_component(MySink, 'sink')
  66         conn = graph.connect_ports(src.output_ports['out'], sink.input_ports['in'])
  67         self.assertEqual(conn.downstream_port.addr, sink.input_ports['in'].addr)
  68         self.assertIs(type(conn), bt2_connection._ConnectionConst)
  69
  70     def test_upstream_port(self):
  71         class MyIter(bt2._UserMessageIterator):
  72             def __next__(self):
  73                 raise bt2.Stop
  74
  75         class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter):
  76             def __init__(self, params, obj):
  77                 self._add_output_port('out')
  78
  79         class MySink(bt2._UserSinkComponent):
  80             def __init__(self, params, obj):
  81                 self._add_input_port('in')
  82
  83             def _user_consume(self):
  84                 raise bt2.Stop
  85
  86         graph = bt2.Graph()
  87         src = graph.add_component(MySource, 'src')
  88         sink = graph.add_component(MySink, 'sink')
  89         conn = graph.connect_ports(src.output_ports['out'], sink.input_ports['in'])
  90         self.assertEqual(conn.upstream_port.addr, src.output_ports['out'].addr)