def test_non_callable(self):
        with pytest.raises(TypeError) as excinfo:
            event.event(123)
        excinfo.match(r"Expected string, callable or None as first argument")

        with pytest.raises(TypeError) as excinfo:
            event.event("name")([])
        excinfo.match(r"Callable must be a function \(`def`\)"
                      r" or coroutine function \(`async def`\)")
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"))