tree 5d83ecf3e01b395aa7daa8f749702e639f9bbcf7
parent 88cc2ca187dfed78f1ecb5bb7ee0ddfd50f61cb1
author Haoming Zhang <zhm1993zhm@gmail.com> 1497556458 -0700
committer Haoming Zhang <zhm1993zhm@gmail.com> 1497573841 -0700

add test case