Add unittest for RandomState.interval
Add unittest for RandomState.interval

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