Adding one more mock and removing unneeded dependencies.

src/webui/requirements.in

@@ -8,4 +8,3 @@ prometheus-client
 pytest
 pytest-benchmark
 lorem-text
-redis

src/webui/tests/test_unitary.py

@@ -6,7 +6,7 @@ from flask.app import Flask
 from flask.helpers import url_for
 # from device.client.DeviceClient import DeviceClient
 from webui.service import create_app
-from webui.proto.context_pb2 import Empty, DeviceId, DeviceList
+from webui.proto.context_pb2 import Empty, DeviceId, DeviceList, TopologyIdList
 
 class TestWebUI(ClientTestCase):
     app = create_app(use_config={'TESTING': True, 
@@ -31,6 +31,11 @@ class TestWebUI(ClientTestCase):
         self.mocker_add_device.start()
         self.addCleanup(self.mocker_add_device.stop)
 
+        self.mocker_list_topology_ids = mock.patch('webui.service.device.routes.context_client.ListTopologyIds')
+        self.mocker_list_topology_ids.return_value = TopologyIdList()
+        self.mocker_list_topology_ids.start()
+        self.addCleanup(self.mocker_list_topology_ids.stop)
+
         return super().setUp(client)
     
     def tearDown(self, client: FlaskClient) -> None: