Function prefetch_does_not_crash

nodedb-vector/src/mmap_segment/reader.rs:555–563

()

    #[test]
    fn prefetch_does_not_crash() {
        let dir = tempfile::tempdir().unwrap();
        let path = dir.path().join("prefetch.vseg");

        let v = vec![1.0f32; 768];
        let seg = MmapVectorSegment::create(&path, 768, &[&v]).unwrap();
        seg.prefetch(0);
        seg.prefetch(999);
    }

    #[test]
    fn empty_segment() {