Make unit tests py3.12 compatible

sunbeam-python/tests/unit/sunbeam/core/test_juju.py

@@ -303,7 +303,7 @@ async def test_jhelper_get_leader_unit(
     app = "k8s"
     unit = await jhelper.get_leader_unit(app, "control-plane")
     assert unit is not None
-    assert applications.get.called_with(app)
+    applications.get.assert_called_with(app)
 
 
 @pytest.mark.asyncio
@@ -334,7 +334,7 @@ async def test_jhelper_get_application(
 ):
     app = await jhelper.get_application("k8s", "control-plane")
     assert app is not None
-    assert applications.get.called_with("k8s")
+    applications.get.assert_called_with("k8s")
 
 
 @pytest.mark.asyncio

sunbeam-python/tests/unit/sunbeam/test_utils.py

@@ -13,12 +13,9 @@
 # limitations under the License.
 
 import textwrap
-from dataclasses import InitVar
 from unittest.mock import mock_open, patch
 
 import pytest
-from pydantic import PrivateAttr
-from pydantic.dataclasses import dataclass
 
 import sunbeam.utils as utils
 
@@ -58,25 +55,6 @@ def ifaddresses():
         yield p
 
 
-@dataclass
-class B:
-    b_str: str | None = None
-    b_dict: dict | None = None
-
-
-@dataclass
-class A:
-    a_init: InitVar[str]
-    a_priv: str = PrivateAttr(default="a_priv")
-    a_int: int | None = None
-    a_str: str | None = None
-    a_dict: dict | None = None
-    a_dict_b: dict[str, B] | None = None
-
-    def __post_init__(self, a_init):
-        self.a_priv = "a_priv"
-
-
 class TestUtils:
     def test_get_fqdn(self, mocker):
         gethostname = mocker.patch("sunbeam.utils.socket.gethostname")