def test_extension_object():
obj = ua.UserNameIdentityToken()
obj.UserName = "******"
obj.Password = b"pass"
obj2 = extensionobject_from_binary(ua.utils.Buffer(extensionobject_to_binary(obj)))
assert type(obj) == type(obj2)
assert obj.UserName == obj2.UserName
assert obj.Password == obj2.Password
v1 = ua.Variant(obj)
v2 = variant_from_binary(ua.utils.Buffer(variant_to_binary(v1)))
assert type(v1) == type(v2)
assert v1.VariantType == v2.VariantType
async def init(self, shelf_file=None):
await self.iserver.init(shelf_file)
# setup some expected values
await self.set_application_uri(self._application_uri)
sa_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_ServerArray))
await sa_node.write_value([self._application_uri])
#TODO: ServiceLevel is 255 default, should be calculated in later Versions
sl_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_ServiceLevel))
await sl_node.write_value(ua.Variant(255, ua.VariantType.Byte))
await self.set_build_info(self.product_uri, self.manufacturer_name,
self.name, "1.0pre", "0", datetime.now())
def _add_variable_value(self, obj):
"""
Returns the value for a Variable based on the objects value type.
"""
_logger.debug("Setting value with type %s and value %s", obj.valuetype,
obj.value)
if obj.valuetype == "ListOfExtensionObject":
values = []
for ext in obj.value:
extobj = self._make_ext_obj(ext)
values.append(extobj)
return ua.Variant(values, ua.VariantType.ExtensionObject)
if obj.valuetype == "ListOfGuid":
return ua.Variant([uuid.UUID(guid) for guid in obj.value],
getattr(ua.VariantType, obj.valuetype[6:]))
if obj.valuetype.startswith("ListOf"):
vtype = obj.valuetype[6:]
if hasattr(ua.ua_binary.Primitives, vtype):
return ua.Variant(obj.value, getattr(ua.VariantType, vtype))
if vtype == "LocalizedText":
return ua.Variant([
ua.LocalizedText(Text=item["Text"], Locale=item["Locale"])
for item in obj.value
])
return ua.Variant([getattr(ua, vtype)(v) for v in obj.value])
if obj.valuetype == "ExtensionObject":
extobj = self._make_ext_obj(obj.value)
return ua.Variant(extobj, getattr(ua.VariantType, obj.valuetype))
if obj.valuetype == "Guid":
return ua.Variant(uuid.UUID(obj.value),
getattr(ua.VariantType, obj.valuetype))
if obj.valuetype == "LocalizedText":
myargs = dict(obj.value)
if "Encoding" in myargs:
del myargs["Encoding"]
ltext = ua.LocalizedText(**dict(obj.value))
return ua.Variant(ltext, ua.VariantType.LocalizedText)
if obj.valuetype == "NodeId":
return ua.Variant(ua.NodeId.from_string(obj.value))
return ua.Variant(obj.value, getattr(ua.VariantType, obj.valuetype))
async def test_functional_advance(srv):
basic_struct_name = 'basic_structure'
basic_struct = await srv.dict_builder.create_data_type(basic_struct_name)
basic_struct.add_field('ID', ua.VariantType.Int32)
basic_struct.add_field('Gender', ua.VariantType.Boolean)
basic_struct.add_field('Comments', ua.VariantType.String)
nested_struct_name = 'nested_structure'
nested_struct = await srv.dict_builder.create_data_type(nested_struct_name)
nested_struct.add_field('Name', ua.VariantType.String)
nested_struct.add_field('Surname', ua.VariantType.String)
nested_struct.add_field('Stuff', basic_struct)
await srv.dict_builder.set_dict_byte_string()
await srv.srv.load_type_definitions()
basic_var = await srv.srv.nodes.objects.add_variable(ua.NodeId(namespaceidx=srv.idx), 'BasicStruct',
ua.Variant(None, ua.VariantType.Null),
datatype=basic_struct.data_type)
basic_msg = get_ua_class(basic_struct_name)()
basic_msg.ID = 3
basic_msg.Gender = True
basic_msg.Comments = 'Test string'
await basic_var.write_value(basic_msg)
nested_var = await srv.srv.nodes.objects.add_variable(ua.NodeId(namespaceidx=srv.idx), 'NestedStruct',
ua.Variant(None, ua.VariantType.Null),
datatype=nested_struct.data_type)
nested_msg = get_ua_class(nested_struct_name)()
nested_msg.Stuff = basic_msg
nested_msg.Name = 'Max'
nested_msg.Surname = 'Karl'
await nested_var.write_value(nested_msg)
basic_result = await basic_var.read_value()
assert basic_result == basic_msg
nested_result = await nested_var.read_value()
assert nested_result == nested_msg
async def test_server_read_write_attribute_value(server: Server):
node = await server.get_objects_node().add_variable(
0, "0:TestVar", 0, varianttype=ua.VariantType.Int64)
dv = server.read_attribute_value(node.nodeid, attr=ua.AttributeIds.Value)
assert dv.Value.Value == 0
dv = ua.DataValue(
Value=ua.Variant(Value=5, VariantType=ua.VariantType.Int64))
await server.write_attribute_value(node.nodeid,
dv,
attr=ua.AttributeIds.Value)
dv = server.read_attribute_value(node.nodeid, attr=ua.AttributeIds.Value)
assert dv.Value.Value == 5
await server.delete_nodes([node])
def value_to_datavalue(val, varianttype=None):
"""
convert anyting to a DataValue using varianttype
"""
if isinstance(val, ua.DataValue):
datavalue = val
elif isinstance(val, ua.Variant):
datavalue = ua.DataValue(val)
datavalue.SourceTimestamp = datetime.utcnow()
else:
datavalue = ua.DataValue(ua.Variant(val, varianttype))
datavalue.SourceTimestamp = datetime.utcnow()
return datavalue
async def main():
server = Server()
await server.init()
server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/")
# setup our own namespace, not really necessary but should as spec
uri = "http://examples.freeopcua.github.io"
idx = await server.register_namespace(uri)
# populating our address space
myobj = await server.nodes.objects.add_object(idx, "MyObject")
# Creating a custom event: Approach 1
# The custom event object automatically will have members from its parent (BaseEventType)
etype = await server.create_custom_event_type(
idx, 'MyFirstEvent', ua.ObjectIds.BaseEventType,
[('MyNumericProperty', ua.VariantType.Float),
('MyStringProperty', ua.VariantType.String)])
myevgen = await server.get_event_generator(etype, myobj)
# Creating a custom event: Approach 2
custom_etype = await server.nodes.base_event_type.add_object_type(
2, 'MySecondEvent')
await custom_etype.add_property(2, 'MyIntProperty',
ua.Variant(0, ua.VariantType.Int32))
await custom_etype.add_property(2, 'MyBoolProperty',
ua.Variant(True, ua.VariantType.Boolean))
mysecondevgen = await server.get_event_generator(custom_etype, myobj)
async with server:
count = 0
while True:
await asyncio.sleep(1)
myevgen.event.Message = ua.LocalizedText("MyFirstEvent %d" % count)
myevgen.event.Severity = count
myevgen.event.MyNumericProperty = count
myevgen.event.MyStringProperty = "Property %d" % count
await myevgen.trigger()
await mysecondevgen.trigger(message="MySecondEvent %d" % count)
count += 1
async def main():
# setup our server
server = Server()
await server.init()
server.set_endpoint('opc.tcp://0.0.0.0:4840/freeopcua/server/')
# setup our own namespace, not really necessary but should as spec
uri = 'http://examples.freeopcua.github.io'
idx = await server.register_namespace(uri)
snode1, _ = await new_struct(server, idx, "MyStruct", [
new_struct_field("MyBool", ua.VariantType.Boolean),
new_struct_field("MyUInt32List", ua.VariantType.UInt32, array=True),
])
snode2, _ = await new_struct(server, idx, "MyOptionalStruct", [
new_struct_field("MyBool", ua.VariantType.Boolean),
new_struct_field("MyUInt32List", ua.VariantType.UInt32, array=True),
new_struct_field("MyInt64", ua.VariantType.Int64, optional=True),
])
enode = await new_enum(server, idx, "MyEnum", [
"titi",
"toto",
"tutu",
])
await server.load_data_type_definitions()
valnode = await server.nodes.objects.add_variable(idx, "my_enum", ua.MyEnum.toto)
await server.nodes.objects.add_variable(idx, "my_struct", ua.Variant(ua.MyStruct(), ua.VariantType.ExtensionObject))
my_struct_optional = ua.MyOptionalStruct()
my_struct_optional.MyUInt32List = [45, 67]
my_struct_optional.MyInt64 = -67
await server.nodes.objects.add_variable(idx, "my_struct_optional", ua.Variant(my_struct_optional, ua.VariantType.ExtensionObject))
await server.export_xml([server.nodes.objects, server.nodes.root, snode1, snode2, enode, valnode], "structs_and_enum.xml")
async with server:
while True:
await asyncio.sleep(1)
def _add_node_attr(self,
item,
nodedata,
name,
vtype=None,
add_timestamps=False):
if item.SpecifiedAttributes & getattr(ua.NodeAttributesMask, name):
dv = ua.DataValue(ua.Variant(getattr(item, name), vtype))
if add_timestamps:
# dv.ServerTimestamp = datetime.utcnow() # Disabled until someone explains us it should be there
dv.SourceTimestamp = datetime.utcnow()
nodedata.attributes[getattr(ua.AttributeIds,
name)] = AttributeValue(dv)
def __init__(self,
id,
name: str = None,
number: int = None,
node: Node = None):
if id is not None:
self.id = ua.Variant(id)
else:
self.id = id #in this case it needs to be added with add_state which takes the nodeid returen from add_state
self.name = name
self.number = number
self.effectivedisplayname = ua.LocalizedText(name, "en-US")
self.node = node #will be written from statemachine.add_state() or you need to overwrite it if the state is part of xml
def to_event_fields(self, select_clauses):
"""
return a field list using a select clause and the object properties
"""
fields = []
for sattr in select_clauses:
if len(sattr.BrowsePath) == 0:
name = ua.AttributeIds(sattr.AttributeId).name
else:
name = self.browse_path_to_attribute_name(sattr.BrowsePath)
try:
val = getattr(self, name)
except AttributeError:
field = ua.Variant(None)
else:
if val is None:
field = ua.Variant(None)
else:
field = ua.Variant(copy.deepcopy(val),
self.data_types[name])
fields.append(field)
return fields
async def downstream_func_call(node_id, *args):
try:
output = await parent.call_method(func_name, *args)
except UaStatusCodeError as e:
status_code = e.code
logging.warning(
f"method {func_name} failed with status code {status_code}"
)
return StatusCode(status_code)
if not isinstance(output, list):
return [ua.Variant(output)]
else:
return output
async def test_custom_struct_(opc):
idx = 4
await new_struct(opc.opc, idx, "MyMyStruct", [
new_struct_field("MyBool", ua.VariantType.Boolean),
new_struct_field("MyUInt32", ua.VariantType.UInt32, array=True),
])
await opc.opc.load_data_type_definitions()
mystruct = ua.MyMyStruct()
mystruct.MyUInt32 = [78, 79]
var = await opc.opc.nodes.objects.add_variable(idx, "my_struct", ua.Variant(mystruct, ua.VariantType.ExtensionObject))
val = await var.read_value()
assert val.MyUInt32 == [78, 79]
def _add_node_attr(self,
item,
nodedata,
name,
vtype=None,
add_timestamps=False,
is_array=False):
if item.SpecifiedAttributes & getattr(ua.NodeAttributesMask, name):
dv = ua.DataValue(
ua.Variant(getattr(item, name), vtype, is_array=is_array),
SourceTimestamp=datetime.utcnow() if add_timestamps else None,
)
nodedata.attributes[getattr(ua.AttributeIds,
name)] = AttributeValue(dv)
async def test_set_value(opc):
o = opc.opc.get_objects_node()
var = ua.Variant(1.98, ua.VariantType.Double)
dvar = ua.DataValue(var)
v = await o.add_variable(3, 'VariableValue', var)
await v.set_value(var.Value)
v1 = await v.get_value()
assert v1 == var.Value
await v.set_value(var)
v2 = await v.get_value()
assert v2 == var.Value
await v.set_data_value(dvar)
v3 = await v.get_data_value()
assert v3.Value == dvar.Value
def __init__(self,
id,
name: str = None,
number: int = None,
node: Node = None):
if id is not None:
self.id = ua.Variant(id)
else:
self.id = id #in this case it needs to be added with add_transition which takes the nodeid returen from add_transition
self.name = name
self.number = number
self._transitiontime = datetime.datetime.utcnow(
) #will be overwritten from _write_transition()
self.node = node #will be written from statemachine.add_state() or you need to overwrite it if the state is part of xml
async def test_write_value(opc):
o = opc.opc.nodes.objects
var = ua.Variant(1.98, ua.VariantType.Double)
dvar = ua.DataValue(var)
v = await o.add_variable(3, 'VariableValue', var)
await v.write_value(var.Value)
v1 = await v.read_value()
assert v1 == var.Value
await v.write_value(var)
v2 = await v.read_value()
assert v2 == var.Value
await v.write_value(dvar)
v3 = await v.read_data_value()
assert v3.Value == dvar.Value
def _add_variable_value(self, obj):
"""
Returns the value for a Variable based on the objects value type.
"""
self.logger.debug("Setting value with type %s and value %s",
obj.valuetype, obj.value)
if obj.valuetype == 'ListOfExtensionObject':
values = []
for ext in obj.value:
extobj = self._make_ext_obj(ext)
values.append(extobj)
return ua.Variant(values, ua.VariantType.ExtensionObject)
elif obj.valuetype == 'ListOfGuid':
return ua.Variant([uuid.UUID(guid) for guid in obj.value],
getattr(ua.VariantType, obj.valuetype[6:]))
elif obj.valuetype.startswith("ListOf"):
vtype = obj.valuetype[6:]
if hasattr(ua.ua_binary.Primitives, vtype):
return ua.Variant(obj.value, getattr(ua.VariantType, vtype))
else:
return ua.Variant([getattr(ua, vtype)(v) for v in obj.value])
elif obj.valuetype == 'ExtensionObject':
extobj = self._make_ext_obj(obj.value)
return ua.Variant(extobj, getattr(ua.VariantType, obj.valuetype))
elif obj.valuetype == 'Guid':
return ua.Variant(uuid.UUID(obj.value),
getattr(ua.VariantType, obj.valuetype))
elif obj.valuetype == 'LocalizedText':
ltext = ua.LocalizedText()
for name, val in obj.value:
if name == "Text":
ltext.Text = val
else:
self.logger.warning(
"While parsing localizedText value, unkown element: %s with val: %s",
name, val)
return ua.Variant(ltext, ua.VariantType.LocalizedText)
elif obj.valuetype == 'NodeId':
return ua.Variant(ua.NodeId.from_string(obj.value))
else:
return ua.Variant(obj.value, getattr(ua.VariantType,
obj.valuetype))
def variant_from_binary(data):
dimensions = None
array = False
encoding = ord(data.read(1))
int_type = encoding & 0b00111111
vtype = ua.datatype_to_varianttype(int_type)
if test_bit(encoding, 7):
value = unpack_uatype_array(vtype, data)
array = True
else:
value = unpack_uatype(vtype, data)
if test_bit(encoding, 6):
dimensions = unpack_uatype_array(ua.VariantType.Int32, data)
value = _reshape(value, dimensions)
return ua.Variant(value, vtype, dimensions, is_array=array)
async def test_group_clients_by_health(self, ha_client, ha_servers):
srv1, srv2 = ha_servers
# srv2 service level is already 255
slevel = srv1.get_node(ua.NodeId(ua.ObjectIds.Server_ServiceLevel))
await ha_client.start()
for c in ha_client.get_clients():
await wait_for_status_change(ha_client, c, 255)
# if all clients are 255, group client should return them all
healthy, unhealthy = await ha_client.group_clients_by_health()
assert len(healthy) == 2
assert not unhealthy
# the service level is considered (by default) unhealthy below 200,
# so change to unhealthy for srv1 and client1
clients = ha_client.get_clients()
await slevel.write_value(ua.Variant(199, ua.VariantType.Byte))
await wait_for_status_change(ha_client, clients[0], 199)
healthy, unhealthy = await ha_client.group_clients_by_health()
assert clients[0] == unhealthy[0]
assert clients[1] == healthy[0]
# now try with a custom HEALTHY_STATE value
ha_client.HEALTHY_STATE = 4
healthy, unhealthy = await ha_client.group_clients_by_health()
assert len(healthy) == 2
assert not unhealthy
await slevel.write_value(ua.Variant(3, ua.VariantType.Byte))
await wait_for_status_change(ha_client, clients[0], 3)
healthy, unhealthy = await ha_client.group_clients_by_health()
assert clients[0] == unhealthy[0]
assert clients[1] == healthy[0]
# set back the value to 255 since the fixture as a wide scope
await slevel.write_value(ua.Variant(255, ua.VariantType.Byte))
def _add_node_attr(self,
attributes: __TYPE_ATTRIBUTES,
nodedata: NodeData,
name: str,
vtype: ua.VariantType = None,
add_timestamps: bool = False,
is_array: bool = False):
if attributes.SpecifiedAttributes & getattr(ua.NodeAttributesMask,
name):
dv = ua.DataValue(
ua.Variant(getattr(attributes, name), vtype,
is_array=is_array),
SourceTimestamp=datetime.utcnow() if add_timestamps else None,
)
nodedata.attributes[getattr(ua.AttributeIds,
name)] = AttributeValue(dv)
async def create_property(parent, nodeid, bname, val, varianttype=None, datatype=None):
"""
create a child node property
args are nodeid, browsename, value, [variant type]
or idx, name, value, [variant type]
"""
nodeid, qname = _parse_nodeid_qname(nodeid, bname)
var = ua.Variant(val, varianttype)
if datatype and isinstance(datatype, int):
datatype = ua.NodeId(datatype, 0)
if datatype and not isinstance(datatype, ua.NodeId):
raise RuntimeError("datatype argument must be a nodeid or an int refering to a nodeid")
return make_node(
parent.server,
await _create_variable(parent.server, parent.nodeid, nodeid, qname, var, datatype=datatype, isproperty=True)
)
async def setup_nodes(self):
"""
Set up some nodes as defined by spec
"""
uries = ['http://opcfoundation.org/UA/']
ns_node = Node(self.isession,
ua.NodeId(ua.ObjectIds.Server_NamespaceArray))
await ns_node.write_value(uries)
params = ua.WriteParameters()
for nodeid in (
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerRead,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerHistoryReadData,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerHistoryReadEvents,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerWrite,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerHistoryUpdateData,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerHistoryUpdateEvents,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerMethodCall,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerBrowse,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerRegisterNodes,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerTranslateBrowsePathsToNodeIds,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxNodesPerNodeManagement,
ua.ObjectIds.
Server_ServerCapabilities_OperationLimits_MaxMonitoredItemsPerCall,
):
attr = ua.WriteValue()
attr.NodeId = ua.NodeId(nodeid)
attr.AttributeId = ua.AttributeIds.Value
attr.Value = ua.DataValue(
ua.Variant(10000, ua.VariantType.UInt32),
StatusCode_=ua.StatusCode(ua.StatusCodes.Good),
ServerTimestamp=datetime.utcnow(),
)
params.NodesToWrite.append(attr)
result = await self.isession.write(params)
result[0].check()
def trigger(self, time=None, message=None):
"""
Trigger the event. This will send a notification to all subscribed clients
"""
self.event.EventId = ua.Variant(uuid.uuid4().hex.encode('utf-8'), ua.VariantType.ByteString)
if time:
self.event.Time = time
else:
self.event.Time = datetime.utcnow()
self.event.ReceiveTime = datetime.utcnow()
# FIXME: LocalTime is wrong but currently know better. For description s. Part 5 page 18
self.event.LocalTime = datetime.utcnow()
if message:
self.event.Message = ua.LocalizedText(message)
elif not self.event.Message:
self.event.Message = ua.LocalizedText(Node(self.isession, self.event.SourceNode).get_browse_name().Text)
self.isession.subscription_service.trigger_event(self.event)
async def create_srv(port, key, cert):
srv = Server()
srvs.append(srv)
await srv.init()
await srv.set_application_uri("urn:freeopcua:python:discovery")
srv.set_endpoint(f"opc.tcp://127.0.0.1:{port}")
srv.set_security_policy([
ua.SecurityPolicyType.NoSecurity,
ua.SecurityPolicyType.Basic256Sha256_SignAndEncrypt,
])
await srv.load_certificate(cert)
await srv.load_private_key(key)
await srv.start()
# default the service level to 255 once started
slevel = srv.get_node(ua.NodeId(ua.ObjectIds.Server_ServiceLevel))
await slevel.write_value(ua.Variant(255, ua.VariantType.Byte))
return srv
def test_where_clause():
cf = ua.ContentFilter()
el = ua.ContentFilterElement()
op = ua.SimpleAttributeOperand()
op.BrowsePath.append(ua.QualifiedName("property", 2))
el.FilterOperands.append(op)
for i in range(10):
op = ua.LiteralOperand()
op.Value = ua.Variant(i)
el.FilterOperands.append(op)
el.FilterOperator = ua.FilterOperator.InList
cf.Elements.append(el)
wce = WhereClauseEvaluator(logging.getLogger(__name__), None, cf)
ev = BaseEvent()
ev._freeze = False
ev.property = 3
assert wce.eval(ev)
async def main():
# setup our server
server = Server()
# Configure server to use sqlite as history database (default is a simple memory dict)
server.iserver.history_manager.set_storage(
HistorySQLite("my_datavalue_history.sql"))
# initialize server
await server.init()
server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/")
# setup our own namespace, not really necessary but should as spec
uri = "http://examples.freeopcua.github.io"
idx = await server.register_namespace(uri)
# get Objects node, this is where we should put our custom stuff
objects = server.get_objects_node()
# populating our address space
myobj = await objects.add_object(idx, "MyObject")
myvar = await myobj.add_variable(idx, "MyVariable",
ua.Variant(0, ua.VariantType.Double))
await myvar.set_writable() # Set MyVariable to be writable by clients
print(myvar)
# starting!
await server.start()
# enable data change history for this particular node, must be called after start since it uses subscription
await server.historize_node_data_change(myvar, period=None, count=100)
try:
count = 0
while True:
await asyncio.sleep(1)
count += 0.1
await myvar.set_value(math.sin(count))
finally:
# close connection, remove subscriptions, etc
await server.stop()
async def test_custom_struct_with_optional_fields(opc):
idx = 4
await new_struct(opc.opc, idx, "MyOptionalStruct", [
new_struct_field("MyBool", ua.VariantType.Boolean),
new_struct_field("MyUInt32", ua.VariantType.UInt32),
new_struct_field("MyInt64", ua.VariantType.Int64, optional=True),
])
await opc.opc.load_data_type_definitions()
my_struct_optional = ua.MyOptionalStruct()
my_struct_optional.MyUInt32 = 45
my_struct_optional.MyInt64 = -67
var = await opc.opc.nodes.objects.add_variable(idx, "my_struct_optional", ua.Variant(my_struct_optional, ua.VariantType.ExtensionObject))
val = await var.read_value()
assert val.MyUInt32 == 45
assert val.MyInt64 == -67
async def test_custom_list_of_struct(opc):
idx = 4
dtype, encs = await new_struct(opc.opc, idx, "MySubStruct3", [
new_struct_field("MyBool", ua.VariantType.Boolean),
new_struct_field("MyUInt32", ua.VariantType.UInt32),
])
await new_struct(opc.opc, idx, "MyMotherStruct3", [
new_struct_field("MyBool", ua.VariantType.Boolean),
new_struct_field("MySubStruct", dtype, array=True),
])
await opc.opc.load_data_type_definitions()
mystruct = ua.MyMotherStruct3()
mystruct.MySubStruct = [ua.MySubStruct3()]
mystruct.MySubStruct[0].MyUInt32 = 78
var = await opc.opc.nodes.objects.add_variable(idx, "my_mother_struct3", ua.Variant(mystruct, ua.VariantType.ExtensionObject))
val = await var.read_value()
assert val.MySubStruct[0].MyUInt32 == 78
async def test_custom_struct_with_enum(opc):
idx = 4
dtype = await new_enum(opc.opc, idx, "MyCustEnum2", [
"titi",
"toto",
"tutu",
])
await new_struct(opc.opc, idx, "MyStructEnum", [
new_struct_field("MyBool", ua.VariantType.Boolean),
new_struct_field("MyEnum", dtype),
])
await opc.opc.load_data_type_definitions()
mystruct = ua.MyStructEnum()
mystruct.MyEnum = ua.MyCustEnum2.tutu
var = await opc.opc.nodes.objects.add_variable(idx, "my_struct2", ua.Variant(mystruct, ua.VariantType.ExtensionObject))
val = await var.read_value()
assert val.MyEnum == ua.MyCustEnum2.tutu