Add unittests for creation.from_data.copy
Add unittests for creation.from_data.copy

t-abe/chainer,truongdq/chainer,jnishi/chainer,okuta/chainer,hvy/chainer,cupy/cupy,ronekko/chainer,chainer/chainer,AlpacaDB/chainer,niboshi/chainer,keisuke-umezawa/chainer,t-abe/chainer,wkentaro/chainer,anaruse/chainer,kikusu/chainer,AlpacaDB/chainer,niboshi/chainer,hvy/chainer,benob/chainer,keisuke-umezawa/chainer,wkentaro/chainer,okuta/chainer,cupy/cupy,benob/chainer,kiyukuta/chainer,cupy/cupy,tkerola/chainer,ktnyt/chainer,jnishi/chainer,niboshi/chainer,wkentaro/chainer,chainer/chainer,rezoo/chainer,cupy/cupy,sinhrks/chainer,jnishi/chainer,delta2323/chainer,sinhrks/chainer,pfnet/chainer,hvy/chainer,hvy/chainer,ysekky/chainer,okuta/chainer,truongdq/chainer,ktnyt/chainer,muupan/chainer,keisuke-umezawa/chainer,niboshi/chainer,aonotas/chainer,chainer/chainer,okuta/chainer,minhpqn/chainer,jnishi/chainer,chainer/chainer,kikusu/chainer,keisuke-umezawa/chainer,muupan/chainer,ktnyt/chainer,tscohen/chainer,wkentaro/chainer,kashif/chainer,ktnyt/chainer,cemoody/chainer