Add test_context.py
Add test_context.py

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