id	version	kind	input	expected
tunnel-current	2	tunnel	offered=2;feature=control.v2	valid
tunnel-n-minus-1	1	tunnel	offered=1;feature=control.v1	valid
tunnel-n-minus-2	0	tunnel	offered=0;feature=control.v1	valid
tunnel-display-request	2	tunnel	offered=2;feature=display.request.v1	valid
tunnel-absolute-input	2	tunnel	offered=2;feature=input.absolute.v1	valid
tunnel-scroll-input	2	tunnel	offered=2;feature=input.scroll.v1	valid
tunnel-unsupported	2	tunnel	offered=3;feature=control.v2	invalid:unsupported_version
tunnel-no-control	2	tunnel	offered=2;feature=media.video	invalid:unsupported_feature