CLONE - In assignments with file submissions a student can upload a file using drag and drop

This test requires an assignment which allows file submissions.

(Note: This test is not suitable for running on the QA testing site, where sending of emails is disabled, as it results in an error message being displayed.)

1. Log in as a student and go to the assignment.
2. Click the 'Add submission' button and check that an area for dragging and dropping files is displayed.
3. Drag and drop a file.
4. Click 'Save changes' and check that a link to the file is displayed next to file submissions.
5. Log in as a teacher and download the file and check that it is correct.