Performing a backup fails when a file is missing

Test pre-requisites A course All file used must be different A forum activity with several posts One post with an image in description (call the file forum_desc .jpg) One post with a file as attachment (call the file forum_attach .txt) A file resource activity with a file in it (call the file file_attach .txt) You can receive emails sent to the admin The tests have to be done one after the other Test #1 Navigate to Home ► Courses ► YOUR CATEGORY ► YOUR COURSE ► Backup Create a backup of the course (leave settings as default) Make sure the backup finishes without warnings Save the new backup file for later use, I will call it test1.mbz Test #2 Delete the files from moodledata (see procedure below) Backup your course Make sure the backup does not fail Make sure a warning message is printed out to tell you that some files were missing Save the new backup file for later use, I will call it test2.mbz Test #3 Run the `php admin/cli/automated_backups.php` Make sure the backup ends without unexpected errors Make sure the console output display information about the missing files Navigate to Home ► Site administration ► Reports ► Backups Make sure the course backup status is 'Warning' Make sure the email sent to the admin displays that a backup had warnings Test #4 Navigate to Home ► Courses ► YOUR CATEGORY ► YOUR COURSE ► Restore Use test2.mbz to restore the course into a new course Make sure the restore succeeded Make sure a warning message told you that some files were missing Test #5 Navigate to Home ► Courses ► YOUR CATEGORY ► YOUR COURSE ► Restore Use test1.mbz to restore the course into a new course Make sure the restore succeeded without any warning Delete the files from moodledata Browse your table mdl_files ordered by ID DESC Look for the rows matching the file names as specified the pre-requisites ( forum_attach , forum_desc , file_attach ) Note down the contenthash for each of them, ie.: da39a3ee5e6b4b0d3255bfef95601890afd80709 Browse to the directories $CFG->dataroot/filedir/da/39 (using the 4 first letters of the contenthash) Rename the file named as the contenthash. ie.: da39a3ee5e6b4b0d3255bfef95601890afd80709.DELETED You're done!