1 files changed, 22 insertions, 0 deletions
diff --git a/src/swarm/topology/tests.rs b/src/swarm/topology/tests.rs
index 4069c0e..1b9c75d 100644
--- a/src/swarm/topology/tests.rs
+++ b/src/swarm/topology/tests.rs
@@ -467,3 +467,25 @@ fn bench_writer_trees() {
         }
     }
 }
+
+/// The neighbours a swarm records count; without one, or with one out of range, the
+/// node's own.
+#[test]
+fn the_swarms_neighbours_count() {
+    use crate::document::testing::change;
+    use crate::document::{Document, store};
+    let mut doc = Document::new();
+    assert_eq!(swarm_neighbours(&doc, 12), 12);
+    for (recorded, expected) in [
+        (serde_json::json!(8), 8),
+        (serde_json::json!(1), 12),
+        (serde_json::json!(1000), 12),
+        (serde_json::json!("eight"), 12),
+    ] {
+        change(&mut doc, |doc| {
+            store::write_path(doc, &neighbours_path(), &recorded).unwrap()
+        });
+        assert_eq!(swarm_neighbours(&doc, 12), expected, "{recorded}");
+    }
+    assert!(affects_neighbours(&neighbours_path()));
+}