def test_ScalarVariable_start(var_type, value, causality, initial,
variability):
var_obj = var_type("var",
causality=causality,
description="a variable",
initial=initial,
variability=variability)
class PySlave(Fmi2Slave):
def __init__(self, **kwargs):
super().__init__(**kwargs)
setattr(self, "var", value)
self.register_variable(var_obj)
def do_step(self, current_time: float, step_size: float):
return True
slave = PySlave(instance_name="testInstance")
xml = slave.to_xml()
var_node = xml.find(".//ScalarVariable[@name='var']")
assert var_node is not None
if ScalarVariable.requires_start(var_obj):
assert var_obj.start == value
else:
assert var_obj.start is None
def test_ScalarVariable_to_xml(causality, initial, variability, name,
description):
var = ScalarVariable(name, causality, description, initial, variability)
valueReference = randint(0, 25000)
var.value_reference = valueReference
node = var.to_xml()
assert node.tag == 'ScalarVariable'
args = locals()
for attr in SCALAR_VARIABLE_ATTRIBUTES:
value = args[attr]
if value is not None:
if isinstance(value, Enum):
assert node.attrib[attr] == value.name
else:
assert node.attrib[attr] == str(value)
def test_ScalarVariable_constructor(causality, initial, variability, name,
description):
var = ScalarVariable(name, causality, description, initial, variability)
assert var.name == name
assert var.value_reference is None
assert var.causality == causality
assert var.description == description
assert var.initial == initial
assert var.variability == variability
def test_ScalarVariable_reference_set_once_only():
v = ScalarVariable('variable')
v.value_reference = 22
with pytest.raises(RuntimeError):
v.value_reference = 33