Refactor out test methods
Refactor out test methods

chainer/chainer,okuta/chainer,ktnyt/chainer,chainer/chainer,keisuke-umezawa/chainer,jnishi/chainer,niboshi/chainer,niboshi/chainer,hvy/chainer,okuta/chainer,tkerola/chainer,pfnet/chainer,jnishi/chainer,jnishi/chainer,chainer/chainer,keisuke-umezawa/chainer,niboshi/chainer,okuta/chainer,chainer/chainer,keisuke-umezawa/chainer,ktnyt/chainer,wkentaro/chainer,wkentaro/chainer,okuta/chainer,jnishi/chainer,wkentaro/chainer,niboshi/chainer,ktnyt/chainer,hvy/chainer,hvy/chainer,wkentaro/chainer,ktnyt/chainer,keisuke-umezawa/chainer,hvy/chainer