def METHOD_NAME(self, topic_building_count, feature_germany_heidelberg):
    indicator = MappingSaturation(topic_building_count, feature_germany_heidelberg)
    asyncio.run(indicator.preprocess())
    assert len(indicator.values) > 0
    assert indicator.values[-1] is not None
    assert indicator.values[-1] > 0
    for t in indicator.timestamps:
        assert isinstance(t, datetime)