sent hashes elsewhere measured

1 files changed, 10 insertions, 0 deletions

diff --git a/src/document/sync.rs b/src/document/sync.rs
index 114b538..5d139e2 100644
--- a/src/document/sync.rs
+++ b/src/document/sync.rs
@@ -661,6 +661,16 @@ impl SyncSession {
         self.state.sent_hashes.len()
     }
 
+    /// Of those, how many count as sent because another parent brings them
+    /// (`known_to_peer`).
+    #[cfg(test)]
+    pub(crate) fn sent_known_elsewhere_len(&self) -> usize {
+        self.known_elsewhere
+            .keys()
+            .filter(|hash| self.state.sent_hashes.contains(*hash))
+            .count()
+    }
+
     /// Of the changes in `doc` beyond `from`, how many the peer has too, as far as we
     /// know (its heads' history, and what went either way since, `sent_hashes`). A delta
     /// it offers from `from` brings those again: offered before it heard what we have