Test Plan: test added

Reviewed By: lxiong@fb.com

Subscribers: lxiong, net-systems@, folly-diffs@, yfeldblum, chalfant, pamelavagata, kma

FB internal diff: D2036967

Tasks: 6925950

Signature: t1:2036967:1430431606:3e115f7ed76b207572db26d352bebefe7a3d306d