[mercari Summer Internship 2017 Qualification] add test
[mercari Summer Internship 2017 Qualification] add test

mikoim/funstuff,mikoim/funstuff,mikoim/funstuff,mikoim/funstuff,mikoim/funstuff,mikoim/funstuff,mikoim/funstuff,mikoim/funstuff,mikoim/funstuff