def test_label_update_existing_label(self):
app = SieveMarathonApp(labels={"label1": "value1"})
app.update_label("label1", "new-value")
self.assertEqual(1, len(app.labels.keys()))
self.assertEqual("new-value", app.labels["label1"])
def test_label_update_non_existent_label(self):
app = SieveMarathonApp(labels={"label1": "value1"})
app.update_label("label2", "value2")
self.assertEqual(2, len(app.labels.keys()))
self.assertEqual("value2", app.labels["label2"])