Function clear_cache

nodedb/src/engine/timeseries/last_value_cache.rs:203–209

()

    #[test]
    fn clear_cache() {
        let mut cache = LastValueCache::new();
        cache.update(sid(1), 100, 1.0);
        cache.update(sid(2), 200, 2.0);
        cache.clear();
        assert!(cache.is_empty());
    }

    #[test]
    fn nonexistent_series() {