test: convert cuDF numpy types to python types in tests (#987)

* convert cuDF scalars to python types

* add pragma: no cover to tests

tests/utils.py

@@ -39,6 +39,10 @@ def compare_dicts(result: Any, expected: dict[str, Any]) -> None:
                 lhs = lhs.as_py()  # noqa: PLW2901
             if hasattr(rhs, "as_py"):  # pragma: no cover
                 rhs = rhs.as_py()  # noqa: PLW2901
+            if hasattr(lhs, "item"):  # pragma: no cover
+                lhs = lhs.item()  # noqa: PLW2901
+            if hasattr(rhs, "item"):  # pragma: no cover
+                rhs = rhs.item()  # noqa: PLW2901
             if isinstance(lhs, float) and not math.isnan(lhs):
                 assert math.isclose(lhs, rhs, rel_tol=0, abs_tol=1e-6), (lhs, rhs)
             elif isinstance(lhs, float) and math.isnan(lhs):