def test_delegate_parameter_with_changed_source_snapshot_matches_value(
value, scale, offset):
delegate_param = DelegateParameter(name="delegate",
source=None,
scale=scale,
offset=offset)
source_parameter = Parameter(name="source",
get_cmd=None,
set_cmd=None,
initial_value=value)
_assert_none_source_is_correct(delegate_param)
delegate_param.source = source_parameter
calc_value = (value - offset) / scale
assert delegate_param.cache.get(get_if_invalid=False) == calc_value
assert delegate_param.source.cache.get(get_if_invalid=False) == value
snapshot = delegate_param.snapshot()
# disregard timestamp that might be slightly different
snapshot["source_parameter"].pop("ts")
source_snapshot = source_parameter.snapshot()
source_snapshot.pop("ts")
assert snapshot["source_parameter"] == source_snapshot
assert snapshot["value"] == calc_value
assert delegate_param.get() == calc_value
# now remove the source again
delegate_param.source = None
_assert_none_source_is_correct(delegate_param)
_assert_delegate_cache_none_source(delegate_param)
def test_snapshot():
p = Parameter('testparam',
set_cmd=None,
get_cmd=None,
offset=1,
scale=2,
initial_value=1)
d = DelegateParameter('test_delegate_parameter',
p,
offset=3,
scale=5,
initial_value=2)
delegate_snapshot = d.snapshot()
source_snapshot = delegate_snapshot.pop('source_parameter')
assert source_snapshot == p.snapshot()
assert delegate_snapshot['value'] == 2
assert source_snapshot['value'] == 13
def test_snapshot():
station = Station()
empty_snapshot = station.snapshot()
assert {'instruments': {},
'parameters': {},
'components': {},
'config': None,
} == empty_snapshot
instrument = DummyInstrument('instrument', gates=['one'])
station.add_component(instrument)
instrument_snapshot = instrument.snapshot()
parameter = Parameter('parameter', label='Label', unit='m')
station.add_component(parameter)
parameter_snapshot = parameter.snapshot()
excluded_parameter = Parameter('excluded_parameter', snapshot_exclude=True)
station.add_component(excluded_parameter)
component = DumyPar('component')
component.metadata['smth'] = 'in the way she moves'
station.add_component(component)
component_snapshot = component.snapshot()
snapshot = station.snapshot()
assert isinstance(snapshot, dict)
assert ['instruments',
'parameters',
'components',
'config',
] == list(snapshot.keys())
assert ['instrument'] == list(snapshot['instruments'].keys())
assert instrument_snapshot == snapshot['instruments']['instrument']
# the list should not contain the excluded parameter
assert ['parameter'] == list(snapshot['parameters'].keys())
assert parameter_snapshot == snapshot['parameters']['parameter']
assert ['component'] == list(snapshot['components'].keys())
assert component_snapshot == snapshot['components']['component']
