+
+AT_CHECK([APPCTL -t test-unixctl.py vlog/set pattern], [0],
+ [Please supply a valid pattern and facility
+])
+AT_CHECK([APPCTL -t test-unixctl.py vlog/set pattern:nonexistent], [0],
+ [Facility nonexistent does not exist
+])
+AT_CHECK([APPCTL -t test-unixctl.py vlog/set pattern:file:'I<3OVS|%m'])
+AT_CHECK([APPCTL -t test-unixctl.py log patterntest])
+AT_CHECK([grep -q 'I<3OVS' log])