This test requires the Dropbox repository to be enabled and a Dropbox account for use in testing.
1. Login as a student and go to a forum.
2. Add a new discussion topic and click the Add button to add an attachment.
3. Choose Dropbox in the file picker then click the Login button.
4. Grant access to your Dropbox account.
5. Select a file then click the 'Post to forum' button.
6. Check that the Dropbox file is shown as an attachment to the post.
7. Try downloading the file: (a) by right-clicking and selecting "Save image as.." and (b) by clicking the "Download all" button top left of the attachment file area.