Feature Request

Dolibarr has a lot of bugs IMO that could be easily discovered before releases if we had some kind of testing suite.
I suggest we make one. I can contribute tests, but I have never written tests in PHP before. I could write some in Python to test the API.

Suggested implementation

no idea, never done this before
see https://www.tutorialspoint.com/software_testing_diction

@rennokki Congrats on this Amazing Package!

Is there any way to prevent user from upgrade downgrade at any time?

Add counter that will log who has downloaded the invoice and how many times the invoice has been downloaded.

At the moment no events will be logged.
Events must be logged and written to the DB. The entity Log shall be used for this.

In another ticket these events will be displayed in the web page and can be reviewed by the admin user.

Every event that triggers a create, update or delete of an entity should be logged.
User supplied input must be sanitized before writing to the log.