ets-berkeley-edu/calcentral — pull request #3013 by johncrossman (2014-09-26 00:15:02+00:00)
Title: CLC-4140, proper test coverage on SessionsController 

https://jira.ets.berkeley.edu/jira/browse/CLC-4140

I believe we have full coverage on #lookup. For example, LTI user session with invalid user_id.