caffe2 - easy - test utils to create operator (#15180)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15180
Test utils to create an operator
On top of D13370461
Reviewed By: ZolotukhinM
Differential Revision: D13382773
fbshipit-source-id: a88040ed5a60f31d3e73f1f958219cd7338dc52e
