def test_delta_conf(mocker):
source = TestAtomic()
processor = TestAtomic()
observer = TestAtomic()
mocker.patch.object(source, 'ta', return_value=1.0)
mocker.patch.object(source, 'output_func', return_value=(0, 1))
mocker.patch.object(processor, 'ta', return_value=1.0)
mocker.patch.object(processor, 'output_func', return_value=(0, 2))
deltas = ['int', 'ext', 'conf']
processor_delta_func = {
delta: mocker.patch.object(processor, 'delta_{}'.format(delta))
for delta in deltas
}
obs_delta_ext = mocker.patch.object(observer, 'delta_ext')
digraph = devs.Digraph()
digraph.add(source)
digraph.add(processor)
digraph.add(observer)
digraph.couple(source, 0, processor, 0)
digraph.couple(source, 0, observer, 0)
digraph.couple(processor, 0, observer, 0)
simulator = devs.Simulator(digraph)
simulator.execute_next_event()
assert not processor_delta_func['int'].called
assert not processor_delta_func['ext'].called
processor_delta_func['conf'].assert_called_once_with([(0, 1)])
assert obs_delta_ext.call_count == 1
assert obs_delta_ext.call_args[0][0] == 1.0
assert len(obs_delta_ext.call_args[0][1]) == 2
assert (0, 1) in obs_delta_ext.call_args[0][1]
assert (0, 2) in obs_delta_ext.call_args[0][1]
def test_simulator_exception_handled():
source = Source()
digraph = devs.Digraph()
digraph.add(source)
simulator = devs.Simulator(digraph)
with pytest.raises(RuntimeError) as ex:
simulator.execute_next_event()
del simulator
assert isinstance(ex.value, RuntimeError)
exception_msg = str(ex.value)
assert exception_msg.startswith("Python traceback follows:")
assert "Intentional error in delta_int" in exception_msg
def test_source_feeds_to_observer(mocker):
source = TestAtomic()
observer = TestAtomic()
mocker.patch.object(source, 'ta', return_value=1.0)
mocker.patch.object(source, 'output_func', return_value=(0, 1))
obs_delta_ext = mocker.patch.object(observer, 'delta_ext')
digraph = devs.Digraph()
digraph.add(source)
digraph.add(observer)
digraph.couple(source, 0, observer, 0)
simulator = devs.Simulator(digraph)
simulator.execute_next_event()
obs_delta_ext.assert_called_once_with(1.0, [(0, 1)])
def digraph():
return devs.Digraph()