Add minimal test_spawned_process_runner.py as generated by ChatGPT

Author: rwgk

cuda_bindings/tests/test_spawned_process_runner.py

@@ -0,0 +1,21 @@
+# Copyright 2025 NVIDIA Corporation.  All rights reserved.
+# SPDX-License-Identifier: LicenseRef-NVIDIA-SOFTWARE-LICENSE
+
+# Note: This only covers what is not covered already in test_path_finder_load.py
+
+import pytest
+from spawned_process_runner import run_in_spawned_child_process
+
+
+def child_crashes():
+    raise RuntimeError("this is an intentional failure")
+
+
+def test_rethrow_child_exception():
+    with pytest.raises(ChildProcessError) as excinfo:
+        run_in_spawned_child_process(child_crashes, rethrow=True)
+
+    msg = str(excinfo.value)
+    assert "Child process exited with code 1" in msg
+    assert "this is an intentional failure" in msg
+    assert "--- stderr-from-child-process ---" in msg