test: allow cuDF series in compare_dicts (#1100)

* allow cuDF series in compare_dicts

* add pragma: no cover for cuDF

tests/utils.py

@@ -34,7 +34,12 @@ def compare_dicts(result: Any, expected: dict[str, Any]) -> None:
         for key in result.columns:
             assert key in expected
     for key in expected:
-        for lhs, rhs in zip_strict(result[key], expected[key]):
+        result_key = result[key]
+        if hasattr(result_key, "_compliant_series") and "CUDF" in str(
+            result_key._compliant_series._implementation
+        ):  # pragma: no cover
+            result_key = result_key.to_pandas()
+        for lhs, rhs in zip_strict(result_key, expected[key]):
             if hasattr(lhs, "as_py"):
                 lhs = lhs.as_py()  # noqa: PLW2901
             if hasattr(rhs, "as_py"):  # pragma: no cover