Improve torrent info test
Improve torrent info test

Summary: Uses all of the torrent info getters to improve coverage.

Reviewers: #kraken, yiran

Reviewed By: #kraken, yiran

Subscribers: jenkins

Differential Revision: https://code.uberinternal.com/D1918517

uber/kraken,uber/kraken,uber/kraken,uber/kraken,uber/kraken