with_scaled constructor for nodegraph

src/core/src/sketch/nodegraph.rs

@@ -7,7 +7,7 @@ use bitmagic::BVector;
 use byteorder::{BigEndian, ByteOrder, LittleEndian, ReadBytesExt, WriteBytesExt};
 
 use crate::prelude::*;
-use crate::sketch::minhash::KmerMinHash;
+use crate::sketch::minhash::{max_hash_for_scaled, KmerMinHash};
 use crate::Error;
 use crate::HashIntoType;
 
@@ -94,6 +94,13 @@ impl Nodegraph {
         Nodegraph::new(tablesizes.as_slice(), ksize)
     }
 
+    pub fn with_scaled(scaled: u64, ksize: usize) -> Nodegraph {
+        let max_hash = max_hash_for_scaled(scaled);
+        let tablesizes = vec![max_hash as usize];
+
+        Nodegraph::new(tablesizes.as_slice(), ksize)
+    }
+
     pub(crate) fn count_kmer(&mut self, kmer: &[u8]) -> bool {
         let h = _hash(kmer);
         self.count(h)
@@ -675,6 +682,15 @@ mod test {
         Ok(())
     }
 
+    fn is_sync<T: Sync>() {}
+    fn is_send<T: Send>() {}
+
+    #[test]
+    fn assert_parallel() {
+        is_sync::<Nodegraph>();
+        is_send::<Nodegraph>();
+    }
+
     #[test]
     fn load_nodegraph() {
         let mut filename = PathBuf::from(env!("CARGO_MANIFEST_DIR"));