def test_remove(self):
        prio_set_list = event._PrioritizedSetList()
        obj = (1,)

        prio_set_list.add(1, obj)
        assert prio_set_list
        prio_set_list.remove(obj)
        assert not prio_set_list

        with pytest.raises(ValueError) as excinfo:
            prio_set_list.remove(obj)
        excinfo.match(r"can not be found")
def add_group():
    form = AddGroupForm()
    if form.validate_on_submit():
        form.save()
        flash(_("Group added."), "success")
        return redirect(url_for("management.groups"))

    return render_template("management/group_form.html", form=form,
                           title=_("Add Group"))