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    # Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
    #
    # Licensed under the Apache License, Version 2.0 (the "License");
    # you may not use this file except in compliance with the License.
    # You may obtain a copy of the License at
    #
    #      http://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.
    
    import copy, grpc, pytest
    from common.proto.context_pb2 import (
        Connection, ConnectionId, Context, ContextId, Device, DeviceId, EndPointId, Service, ServiceId, Topology, TopologyId)
    from context.client.ContextClient import ContextClient
    from context.service.database.uuids.Connection import connection_get_uuid
    from context.service.database.uuids.EndPoint import endpoint_get_uuid
    #from context.client.EventsCollector import EventsCollector
    from .Objects import (
        CONNECTION_R1_R3, CONNECTION_R1_R3_ID, CONNECTION_R1_R3_NAME, CONTEXT, CONTEXT_ID, DEVICE_R1, DEVICE_R1_ID,
        DEVICE_R2, DEVICE_R2_ID, DEVICE_R3, DEVICE_R3_ID, SERVICE_R1_R2, SERVICE_R1_R2_ID, SERVICE_R1_R3, SERVICE_R1_R3_ID,
        SERVICE_R2_R3, SERVICE_R2_R3_ID, TOPOLOGY, TOPOLOGY_ID)
    
    
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    @pytest.mark.depends(on=['context/tests/test_service.py::test_service', 'context/tests/test_slice.py::test_slice'])
    
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    def test_connection(context_client : ContextClient) -> None:
    
        # ----- Initialize the EventsCollector -----------------------------------------------------------------------------
        #events_collector = EventsCollector(
        #    context_client, log_events_received=True,
        #    activate_context_collector = False, activate_topology_collector = False, activate_device_collector = False,
        #    activate_link_collector = False, activate_service_collector = False, activate_slice_collector = False,
        #    activate_connection_collector = True)
        #events_collector.start()
    
        # ----- Prepare dependencies for the test and capture related events -----------------------------------------------
        response = context_client.SetContext(Context(**CONTEXT))
        context_uuid = response.context_uuid.uuid
    
        response = context_client.SetTopology(Topology(**TOPOLOGY))
        assert response.context_id.context_uuid.uuid == context_uuid
        topology_uuid = response.topology_uuid.uuid
    
        response = context_client.SetDevice(Device(**DEVICE_R1))
        device_r1_uuid = response.device_uuid.uuid
    
        response = context_client.SetDevice(Device(**DEVICE_R2))
        device_r2_uuid = response.device_uuid.uuid # pylint: disable=unused-variable
    
        response = context_client.SetDevice(Device(**DEVICE_R3))
        device_r3_uuid = response.device_uuid.uuid # pylint: disable=unused-variable
    
        response = context_client.SetService(Service(**SERVICE_R1_R2))
        assert response.context_id.context_uuid.uuid == context_uuid
        service_r1_r2_uuid = response.service_uuid.uuid # pylint: disable=unused-variable
    
        response = context_client.SetService(Service(**SERVICE_R2_R3))
        assert response.context_id.context_uuid.uuid == context_uuid
        service_r2_r3_uuid = response.service_uuid.uuid # pylint: disable=unused-variable
    
        response = context_client.SetService(Service(**SERVICE_R1_R3))
        assert response.context_id.context_uuid.uuid == context_uuid
        service_r1_r3_uuid = response.service_uuid.uuid
    
        #events = events_collector.get_events(block=True, count=8)
        #assert isinstance(events[0], ContextEvent)
        #assert events[0].event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert events[0].context_id.context_uuid.uuid == context_uuid
        #assert isinstance(events[1], TopologyEvent)
        #assert events[1].event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert events[1].topology_id.context_id.context_uuid.uuid == context_uuid
        #assert events[1].topology_id.topology_uuid.uuid == topology_uuid
        #assert isinstance(events[2], DeviceEvent)
        #assert events[2].event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert events[2].device_id.device_uuid.uuid == device_r1_uuid
        #assert isinstance(events[3], DeviceEvent)
        #assert events[3].event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert events[3].device_id.device_uuid.uuid == device_r2_uuid
        #assert isinstance(events[4], DeviceEvent)
        #assert events[4].event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert events[4].device_id.device_uuid.uuid == device_r3_uuid
        #assert isinstance(events[5], ServiceEvent)
        #assert events[5].event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert events[5].service_id.context_id.context_uuid.uuid == context_uuid
        #assert events[5].service_id.service_uuid.uuid == service_r1_r2_uuid
        #assert isinstance(events[6], ContextEvent)
        #assert events[6].event.event_type == EventTypeEnum.EVENTTYPE_UPDATE
        #assert events[6].context_id.context_uuid.uuid == context_uuid
        #assert isinstance(events[7], ServiceEvent)
        #assert events[7].event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert events[7].service_id.context_id.context_uuid.uuid == context_uuid
        #assert events[7].service_id.service_uuid.uuid == service_r2_r3_uuid
        #assert isinstance(events[8], ContextEvent)
        #assert events[8].event.event_type == EventTypeEnum.EVENTTYPE_UPDATE
        #assert events[8].context_id.context_uuid.uuid == context_uuid
        #assert isinstance(events[9], ServiceEvent)
        #assert events[9].event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert events[9].service_id.context_id.context_uuid.uuid == context_uuid
        #assert events[9].service_id.service_uuid.uuid == service_r1_r3_uuid
        #assert isinstance(events[10], ContextEvent)
        #assert events[10].event.event_type == EventTypeEnum.EVENTTYPE_UPDATE
        #assert events[10].context_id.context_uuid.uuid == context_uuid
    
        # ----- Get when the object does not exist -------------------------------------------------------------------------
        connection_id = ConnectionId(**CONNECTION_R1_R3_ID)
        connection_uuid = connection_get_uuid(connection_id, allow_random=False)
        with pytest.raises(grpc.RpcError) as e:
            context_client.GetConnection(connection_id)
        assert e.value.code() == grpc.StatusCode.NOT_FOUND
        MSG = 'Connection({:s}) not found; connection_uuid generated was: {:s}'
        assert e.value.details() == MSG.format(CONNECTION_R1_R3_NAME, connection_uuid)
    
        # ----- List when the object does not exist ------------------------------------------------------------------------
        response = context_client.ListConnectionIds(ServiceId(**SERVICE_R1_R3_ID))
        assert len(response.connection_ids) == 0
    
        response = context_client.ListConnections(ServiceId(**SERVICE_R1_R3_ID))
        assert len(response.connections) == 0
    
        # ----- Create the object ------------------------------------------------------------------------------------------
        with pytest.raises(grpc.RpcError) as e:
            WRONG_CONNECTION = copy.deepcopy(CONNECTION_R1_R3)
            WRONG_CONNECTION['path_hops_endpoint_ids'][0]\
                ['topology_id']['context_id']['context_uuid']['uuid'] = 'wrong-context-uuid'
            context_client.SetConnection(Connection(**WRONG_CONNECTION))
        assert e.value.code() == grpc.StatusCode.NOT_FOUND
        wrong_endpoint_id = EndPointId(**WRONG_CONNECTION['path_hops_endpoint_ids'][0])
        _,_,wrong_endpoint_uuid = endpoint_get_uuid(wrong_endpoint_id, allow_random=False)
        msg = 'endpoint({:s}) not found; while inserting in table "connection_endpoint"'.format(wrong_endpoint_uuid)
        assert e.value.details() == msg
        # TODO: should we check that all endpoints belong to same topology?
        # TODO: should we check that endpoints form links over the topology?
    
        response = context_client.SetConnection(Connection(**CONNECTION_R1_R3))
        connection_r1_r3_uuid = response.connection_uuid.uuid
    
        # ----- Check create event -----------------------------------------------------------------------------------------
        #event = events_collector.get_event(block=True)
        #assert isinstance(event, ConnectionEvent)
        #assert event.event.event_type == EventTypeEnum.EVENTTYPE_CREATE
        #assert event.connection_id.connection_uuid.uuid == connection_r1_r3_uuid
    
        # ----- Get when the object exists ---------------------------------------------------------------------------------
        response = context_client.GetConnection(ConnectionId(**CONNECTION_R1_R3_ID))
        assert response.connection_id.connection_uuid.uuid == connection_r1_r3_uuid
        assert response.service_id.context_id.context_uuid.uuid == context_uuid
        assert response.service_id.service_uuid.uuid == service_r1_r3_uuid
        assert len(response.path_hops_endpoint_ids) == 6
        assert len(response.sub_service_ids) == 2
    
        # ----- List when the object exists --------------------------------------------------------------------------------
        response = context_client.ListConnectionIds(ServiceId(**SERVICE_R1_R3_ID))
        assert len(response.connection_ids) == 1
        assert response.connection_ids[0].connection_uuid.uuid == connection_r1_r3_uuid
    
        response = context_client.ListConnections(ServiceId(**SERVICE_R1_R3_ID))
        assert len(response.connections) == 1
        assert response.connections[0].connection_id.connection_uuid.uuid == connection_r1_r3_uuid
        assert len(response.connections[0].path_hops_endpoint_ids) == 6
        assert len(response.connections[0].sub_service_ids) == 2
    
        # ----- Update the object ------------------------------------------------------------------------------------------
        # TODO: change something... path? subservices?
        response = context_client.SetConnection(Connection(**CONNECTION_R1_R3))
        assert response.connection_uuid.uuid == connection_r1_r3_uuid
    
        # ----- Check update event -----------------------------------------------------------------------------------------
        #event = events_collector.get_event(block=True)
        #assert isinstance(event, ConnectionEvent)
        #assert event.event.event_type == EventTypeEnum.EVENTTYPE_UPDATE
        #assert event.connection_id.connection_uuid.uuid == connection_r1_r3_uuid
    
        # ----- Get when the object is modified ----------------------------------------------------------------------------
        response = context_client.GetConnection(ConnectionId(**CONNECTION_R1_R3_ID))
        assert response.connection_id.connection_uuid.uuid == connection_r1_r3_uuid
        assert response.service_id.context_id.context_uuid.uuid == context_uuid
        assert response.service_id.service_uuid.uuid == service_r1_r3_uuid
        assert len(response.path_hops_endpoint_ids) == 6
        assert len(response.sub_service_ids) == 2
    
        # ----- List when the object is modified ---------------------------------------------------------------------------
        response = context_client.ListConnectionIds(ServiceId(**SERVICE_R1_R3_ID))
        assert len(response.connection_ids) == 1
        assert response.connection_ids[0].connection_uuid.uuid == connection_r1_r3_uuid
    
        response = context_client.ListConnections(ServiceId(**SERVICE_R1_R3_ID))
        assert len(response.connections) == 1
        assert response.connections[0].connection_id.connection_uuid.uuid == connection_r1_r3_uuid
        assert len(response.connections[0].path_hops_endpoint_ids) == 6
        assert len(response.connections[0].sub_service_ids) == 2
    
        # ----- Remove the object ------------------------------------------------------------------------------------------
        context_client.RemoveConnection(ConnectionId(**CONNECTION_R1_R3_ID))
    
        # ----- Check remove event -----------------------------------------------------------------------------------------
        #event = events_collector.get_event(block=True)
        #assert isinstance(event, ConnectionEvent)
        #assert event.event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert event.connection_id.connection_uuid.uuid == connection_r1_r3_uuid
    
        # ----- List after deleting the object -----------------------------------------------------------------------------
        response = context_client.ListConnectionIds(ServiceId(**SERVICE_R1_R3_ID))
        assert len(response.connection_ids) == 0
    
        response = context_client.ListConnections(ServiceId(**SERVICE_R1_R3_ID))
        assert len(response.connections) == 0
    
        # ----- Clean dependencies used in the test and capture related events ---------------------------------------------
        context_client.RemoveService(ServiceId(**SERVICE_R1_R3_ID))
        context_client.RemoveService(ServiceId(**SERVICE_R2_R3_ID))
        context_client.RemoveService(ServiceId(**SERVICE_R1_R2_ID))
        context_client.RemoveDevice(DeviceId(**DEVICE_R1_ID))
        context_client.RemoveDevice(DeviceId(**DEVICE_R2_ID))
        context_client.RemoveDevice(DeviceId(**DEVICE_R3_ID))
        context_client.RemoveTopology(TopologyId(**TOPOLOGY_ID))
        context_client.RemoveContext(ContextId(**CONTEXT_ID))
    
        #events = events_collector.get_events(block=True, count=8)
        #assert isinstance(events[0], ServiceEvent)
        #assert events[0].event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert events[0].service_id.context_id.context_uuid.uuid == context_uuid
        #assert events[0].service_id.service_uuid.uuid == service_r1_r3_uuid
        #assert isinstance(events[1], ServiceEvent)
        #assert events[1].event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert events[1].service_id.context_id.context_uuid.uuid == context_uuid
        #assert events[1].service_id.service_uuid.uuid == service_r2_r3_uuid
        #assert isinstance(events[2], ServiceEvent)
        #assert events[2].event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert events[2].service_id.context_id.context_uuid.uuid == context_uuid
        #assert events[2].service_id.service_uuid.uuid == service_r1_r2_uuid
        #assert isinstance(events[3], DeviceEvent)
        #assert events[3].event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert events[3].device_id.device_uuid.uuid == device_r1_uuid
        #assert isinstance(events[4], DeviceEvent)
        #assert events[4].event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert events[4].device_id.device_uuid.uuid == device_r2_uuid
        #assert isinstance(events[5], DeviceEvent)
        #assert events[5].event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert events[5].device_id.device_uuid.uuid == device_r3_uuid
        #assert isinstance(events[6], TopologyEvent)
        #assert events[6].event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert events[6].topology_id.context_id.context_uuid.uuid == context_uuid
        #assert events[6].topology_id.topology_uuid.uuid == topology_uuid
        #assert isinstance(events[7], ContextEvent)
        #assert events[7].event.event_type == EventTypeEnum.EVENTTYPE_REMOVE
        #assert events[7].context_id.context_uuid.uuid == context_uuid
    
        # ----- Stop the EventsCollector -----------------------------------------------------------------------------------
        #events_collector.stop()