Test calendar.robur.coop

I've run through and found this:

In some places, robur returns 403 instead of 404 (possibly to prevent people from scanning resources in a shared name space?)
Scheduling is not supported (though I see they have it on the todo-list - at least scheduling by email)
I'm getting a 400 when asking for a sync token
Also getting errors or empty responses when querying weather the server supports the dav protocol, cdav protocol, and what calendar component types a calendar supports
no support for journal entries
no support for freebusy queries (rfc4791)
when doing date searches on tasks, no tasks are returned
a yearly recurring event expands like if it was a monthly event (reported at https://github.com/roburio/caldav/issues/28). The rest of the testing for recurring events was not run due to this.
Text match searching does not work too well - the whole calendar is returned. According to the examples in the RFC, even a uid lookup should be performed as a text match search.

python-caldav / caldav