add workflow test for python 3.12

.github/workflows/tests.yml

@@ -17,6 +17,7 @@ jobs:
           - '3.9'
           - '3.10'
           - '3.11'
+          - '3.12'
 
     name: Python ${{ matrix.python-version }}
     steps:

test/test_protocol.py

@@ -68,6 +68,6 @@ class ProtocolTest(unittest.TestCase):
 
         # 2nd call of keep_alive should close the transport
         self.protocol.keep_alive()
-        assert mock_transport.close.called_once()
+        mock_transport.close.assert_called_once()
 
         self.protocol.connection_lost(None)

tox.ini

@@ -6,6 +6,7 @@ deps=
   pytest-asyncio
   pytest-mock
   dlms_cosem
+  setuptools
 commands=
   py.test --cov=dsmr_parser test {posargs}
   pylama dsmr_parser test