fix typing

src/charm_state.py

@@ -117,7 +117,7 @@ def _get_credentials_from_agent_relation(
     return Credentials(address=address, secret=secret)
 
 
-def _get_packages_to_install(charm: ops.CharmBase) -> tuple[str, ...]:
+def _get_packages_to_install(charm: ops.CharmBase) -> typing.Tuple[str, ...]:
     """Get list of apt packages to install from charm configuration.
 
     Args:
@@ -147,7 +147,7 @@ class State:
 
     agent_meta: AgentMeta
     agent_relation_credentials: typing.Optional[Credentials]
-    apt_packages: tuple[str, ...]
+    apt_packages: typing.Tuple[str, ...]
     unit_data: UnitData
     jenkins_agent_service_name: str = "jenkins-agent"
 

tests/unit/test_service.py

@@ -6,6 +6,7 @@
 """Test for service interaction."""
 
 import os
+import typing
 from pathlib import Path
 from unittest.mock import MagicMock
 
@@ -92,7 +93,7 @@ def test_on_install_packages_fail(monkeypatch: pytest.MonkeyPatch):
         pytest.param(("hello", "world"), id="Has packages"),
     ],
 )
-def test_on_install_packages(monkeypatch: pytest.MonkeyPatch, packages: tuple[str, ...]):
+def test_on_install_packages(monkeypatch: pytest.MonkeyPatch, packages: typing.Tuple[str, ...]):
     """
     arrange: Given a monkeypatched apt lib and list of packages to install.
     act: when install_apt_packages is called.

tests/unit/test_state.py

@@ -9,6 +9,7 @@
 # pylint:disable=protected-access
 
 import os
+import typing
 from unittest.mock import MagicMock
 
 import ops
@@ -44,7 +45,7 @@ def test_from_charm_invalid_metadata(
     ],
 )
 def test__get_packages_to_install(
-    harness: ops.testing.Harness, packages: str, expected: tuple[str, ...]
+    harness: ops.testing.Harness, packages: str, expected: typing.Tuple[str, ...]
 ):
     """
     arrange: given charm apt-packages config.