id	version	kind	input	expected
tunnel-current	1	tunnel	offered=1;feature=control.v1	valid
tunnel-n-minus-1	0	tunnel	offered=0;feature=control.v1	valid
tunnel-n-minus-2	-1	tunnel	offered=-1;feature=control.v1	valid
tunnel-unsupported	1	tunnel	offered=2;feature=control.v1	invalid:unsupported_version
tunnel-no-control	1	tunnel	offered=1;feature=media.video	invalid:unsupported_feature