test plan:
1. work in an account with scribd enabled
and google doc previews disabled
(in console, add "-google_docs_previews" to the
Accounts's allowed_services)
2. upload a scribd-previewable file type in the files tab
(it needs to be a new file that is not already in
the canvas instance)
3. make sure it previews properly (it may take a minute
after uploading for the scribd rendering to complete)
4. delete the file
5. undelete the file (/courses/X/undelete)
6. reload the files tab, and click on the filename on the
left side.
- on the right, you should see a message like
"the preview for this document is unavailable;
please try again later".
7. reload the files tab again, then click on the filename.
- if the scribd rendering has completed, you should see
a scribd preview. if you don't, wait a few minutes and
reload the files page again, to give scribd some time.
8. test other areas documents can be previewed. (it's
permissible to simply delete the scribd_doc in the console
via attachment.delete_scribd_doc, then try to preview,
see that a "try again later" message appears, and the
scribd preview appears in later page views.)
a. documents embedded in rich text via the wiki sidebar
b. student submissions, as viewed by the student
("submission details" button, "preview" icon)
c. student submissions, as viewed by the teacher
in SpeedGrader(TM)
fixes CNVS-7019
Change-Id: I37be820a776637252e14b6a28a1be389b718ff9f
Reviewed-on: https://gerrit.instructure.com/22438
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Bracken Mosbacker <bracken@instructure.com>
QA-Review: August Thornton <august@instructure.com>
Product-Review: Matt Goodwin <mattg@instructure.com>
4cc01282e1