tree 985775392db244d96011808f776732e066473a9d
parent a79b62d74aeb8accf8d93904bb63ee214a0c55b9
author Haoming Zhang <zhm1993zhm@gmail.com> 1499290524 -0700
committer Haoming Zhang <zhm1993zhm@gmail.com> 1499290524 -0700

add test case