Prerequisites

1. Create a course
2. Enrol three students A, B, C
3. Add a group G containing the students A and B

Testing with individual submissions

1. Create an assignment with feedback types "Offline grading worksheet" and "Feedback files" enabled and group submission disabled
2. Create a submission for the students B and C
3. Visit the assignment as a teacher
4. Click on "View all submissions"
5. Click on "Download all submissions" (top right of the page) with "Download submissions in folders" (bottom of the page) enabled
6. Unzip the file.
7. Add a file in the folder belonging to student C
8. Re-ZIP the contents and upload the modified ZIP file choosing "Upload multiple feedback files in a zip" in the "Grading action" dropdown
9. Confirm that you see the added file for student C
10. Visit the assignment as a teacher
11. Click on "View all submissions"
12. Select student B in the table using the checkbox
13. Choose on "Download selected submissions" in the "With selected..." dropdown with "Download submissions in folders" enabled (bottom of the page).
14. Unzip the file.
15. Add a file in the folder belonging to student B
16. Re-ZIP the contents and upload the modified ZIP file choosing "Upload multiple feedback files in a zip" in the "Grading action" dropdown
17. Confirm that you see the added file for student B

Testing uploading folders

1. Create an assignment with feedback types "Offline grading worksheet" and "Feedback files" enabled and group submission disabled
2. Create a submission for the student A
3. Visit the assignment as a teacher
4. Click on "View all submissions"
5. Click on "Download all submissions" (top right of the page) with "Download submissions in folders" (bottom of the page) enabled
6. Unzip the file.
7. Add a sub-folder "Test" in the folder belonging to student A
8. Add a file to the sub-folder "Test"
9. Re-ZIP the contents and upload the modified ZIP file choosing "Upload multiple feedback files in a zip" in the "Grading action" dropdown
10. Confirm that you see the added file