Use gocheck for test.
Use gocheck for test.

Signed-off-by: Chief <d033e22ae348aeb5660fc2140aec35850c4da997@117.sh>

mcuadros/go-git,go-git/go-git,src-d/go-git,go-git/go-git,mcuadros/go-git,src-d/go-git