nfs_tools: add test_nfs_tools.py for intergration testing

Add test_nfs helper for validating changes to nfs_tools.py

Signed-off-by: Dai Ngo <[email protected]>

drgn_tools/tests/test_nfs_tools.py

@@ -0,0 +1,15 @@
+# Copyright (c) 2023, Oracle and/or its affiliates.
+# Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl/
+import pytest
+
+import drgn_tools.nfs_tools
+from drgn_tools.module import KernelModule
+
+
+def test_nfs(prog):
+    nfs = KernelModule.find(prog, "nfs")
+    if not nfs:
+        pytest.skip("NFS module not loaded")
+
+    # This is just a smoke test
+    drgn_tools.nfs_tools.nfsshow(prog)