Function dense_tile_starts_all_null

nodedb-array/src/tile/dense_tile.rs:108–115

()

    #[test]
    fn dense_tile_starts_all_null() {
        let s = schema_4x4();
        let t = DenseTile::empty(&s);
        assert_eq!(t.cell_count(), 16);
        for col in &t.attr_cols {
            assert!(col.iter().all(|c| matches!(c, CellValue::Null)));
        }
    }
}