Wrote unit test for to_device
Wrote unit test for to_device

cupy/cupy,ysekky/chainer,hvy/chainer,cupy/cupy,chainer/chainer,wkentaro/chainer,chainer/chainer,hvy/chainer,niboshi/chainer,wkentaro/chainer,ktnyt/chainer,wkentaro/chainer,cupy/cupy,niboshi/chainer,jnishi/chainer,kiyukuta/chainer,hvy/chainer,okuta/chainer,okuta/chainer,ktnyt/chainer,jnishi/chainer,keisuke-umezawa/chainer,tkerola/chainer,rezoo/chainer,okuta/chainer,jnishi/chainer,chainer/chainer,cupy/cupy,pfnet/chainer,okuta/chainer,ronekko/chainer,chainer/chainer,keisuke-umezawa/chainer,niboshi/chainer,delta2323/chainer,kashif/chainer,jnishi/chainer,niboshi/chainer,aonotas/chainer,keisuke-umezawa/chainer,ktnyt/chainer,hvy/chainer,keisuke-umezawa/chainer,wkentaro/chainer,ktnyt/chainer,anaruse/chainer