Add negative test case
Add negative test case

cupy/cupy,1986ks/chainer,keisuke-umezawa/chainer,muupan/chainer,delta2323/chainer,jnishi/chainer,ytoyama/yans_chainer_hackathon,AlpacaDB/chainer,truongdq/chainer,tigerneil/chainer,rezoo/chainer,chainer/chainer,benob/chainer,anaruse/chainer,jnishi/chainer,kikusu/chainer,yanweifu/chainer,kashif/chainer,Kaisuke5/chainer,tscohen/chainer,cupy/cupy,AlpacaDB/chainer,ktnyt/chainer,ysekky/chainer,niboshi/chainer,hvy/chainer,jnishi/chainer,hvy/chainer,niboshi/chainer,aonotas/chainer,keisuke-umezawa/chainer,sinhrks/chainer,jnishi/chainer,keisuke-umezawa/chainer,minhpqn/chainer,okuta/chainer,wkentaro/chainer,t-abe/chainer,cemoody/chainer,cupy/cupy,hidenori-t/chainer,ktnyt/chainer,wkentaro/chainer,chainer/chainer,ktnyt/chainer,ronekko/chainer,chainer/chainer,pfnet/chainer,tkerola/chainer,wkentaro/chainer,kiyukuta/chainer,benob/chainer,niboshi/chainer,laysakura/chainer,t-abe/chainer,kikusu/chainer,ikasumi/chainer,truongdq/chainer,sou81821/chainer,chainer/chainer,cupy/cupy,wkentaro/chainer,keisuke-umezawa/chainer,muupan/chainer,okuta/chainer,okuta/chainer,niboshi/chainer,ktnyt/chainer,okuta/chainer,hvy/chainer,hvy/chainer,sinhrks/chainer