Progress bar on image upload was introduced with #65828 in saas-14.3.
Since, it has been broken in saas-14.3 with 3765ac1 which broke the flow for
image unrecognized by PIL, see the other commit of this PR.
It was also completely broken in master (saas-14.5) with the wowl refactoring,
where no progress bar were shown at all. It would show empty toastr.
This was fixed with #74027
This commit introduces a complete testing suite for that progress bar:
- Single image upload
- Multi image upload
- Success upload
- Unsupported error
- Unrecognized error
task-2607393
Closes#74122closesodoo/odoo#74454
X-original-commit: 381d432faf8d19e71ff1d63c29a14064a6d7f57f
Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>