def test_build_event(self):
        evt = event.build_event("evt_name", arg1="val1", arg2=None)
        assert evt.name == "evt_name"
        assert evt.args == {'arg1': "val1", 'arg2': None}
def add_item(self, item):
    self._vbox_items.pack_start(item.widget, expand=False, fill=False)