Add a public pathfinder driver info regression test.

Protect the new top-level driver-info re-exports so internal-only test coverage does not miss a broken `cuda.pathfinder` plumbing layer.

Made-with: Cursor

Author: rwgk

cuda_pathfinder/tests/test_utils_driver_info.py

@@ -5,6 +5,15 @@
 
 import pytest
 
+from cuda.pathfinder import (
+    DriverCudaVersion as PublicDriverCudaVersion,
+)
+from cuda.pathfinder import (
+    QueryDriverCudaVersionError as PublicQueryDriverCudaVersionError,
+)
+from cuda.pathfinder import (
+    query_driver_cuda_version as public_query_driver_cuda_version,
+)
 from cuda.pathfinder._dynamic_libs.load_dl_common import LoadedDL
 from cuda.pathfinder._utils import driver_info
 
@@ -42,6 +51,12 @@ def _loaded_cuda(abs_path: str) -> LoadedDL:
     )
 
 
+def test_driver_cuda_version_public_api_exports():
+    assert PublicDriverCudaVersion is driver_info.DriverCudaVersion
+    assert PublicQueryDriverCudaVersionError is driver_info.QueryDriverCudaVersionError
+    assert public_query_driver_cuda_version is driver_info.query_driver_cuda_version
+
+
 def test_query_driver_cuda_version_uses_windll_on_windows(monkeypatch):
     fake_driver_lib = _FakeDriverLib(status=0, version=12080)
     loaded_paths: list[str] = []