File	Line Coverage			Functions		Branches
backoff.rs	90.28%	90.28%	65 / 72	53.4%	55 / 103	100%	0 / 0
descriptor.rs	89.03%	89.03%	138 / 155	19.12%	13 / 68	100%	0 / 0
reactor.rs	75.81%	75.81%	633 / 835	20.42%	146 / 715	100%	0 / 0