adds property observer test

tests/observer_pattern/observer/test_property_observer.py

@@ -0,0 +1,21 @@
+from typing import Any
+
+from pydase.observer_pattern.observable.observable import Observable
+from pydase.observer_pattern.observer.property_observer import PropertyObserver
+
+
+def test_inherited_property_dependency_resolution() -> None:
+    class BaseObservable(Observable):
+        _name = "BaseObservable"
+
+        @property
+        def name(self) -> str:
+            return self._name
+
+    class DerivedObservable(BaseObservable):
+        _name = "DerivedObservable"
+
+    class MyObserver(PropertyObserver):
+        def on_change(self, full_access_path: str, value: Any) -> None: ...
+
+    assert MyObserver(DerivedObservable()).property_deps_dict == {"_name": ["name"]}