From 99a6e4032319d5c59a686c94319ff914f0f974dc Mon Sep 17 00:00:00 2001
From: Christian Lappin <36496308+christianlappin@users.noreply.github.com>
Date: Mon, 9 Nov 2026 12:50:22 -0500
Subject: [PATCH 1/2] test(layers): synchronize thumbnail queue assertion
 (#6318)

---
 crates/ui-egui/src/panels/layers/thumbs.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/crates/ui-egui/src/panels/layers/thumbs.rs b/crates/ui-egui/src/panels/layers/thumbs.rs
index 4fcdc03e4..2a6d010b9 100644
--- a/crates/ui-egui/src/panels/layers/thumbs.rs
+++ b/crates/ui-egui/src/panels/layers/thumbs.rs
@@ -957,10 +957,15 @@ mod tests {
             assert!(thumbs.texture(&ctx, &src_b, n, 24).is_some(), "the shown document's thumbnails are shown");
         }
         // Shown again, document 1's rows are asked for again and come back.
+        // Hold the worker so texture() cannot collect a completed row before the count.
+        let release = hold(&thumbs);
         for n in &a_rows {
             assert!(thumbs.texture(&ctx, &src_a, n, 24).is_none());
         }
         assert_eq!(thumbs.pending.keys().filter(|k| k.0 == 1).count(), 3);
+        release.send(()).expect("the held job is waiting");
+        let held = thumbs.worker.as_ref().and_then(ThumbWorker::wait).expect("the held job finishes");
+        assert_eq!(held.key.0, (0, NodeId(0)));
         for _ in &a_rows {
             receive_checked(&ctx, &mut thumbs, 1, &a, &a_rows);
         }

From f94b0f46d30f6be87a24b64c578f5e77d645bfd0 Mon Sep 17 00:00:00 2001
From: Christian Lappin <36496308+christianlappin@users.noreply.github.com>
Date: Mon, 9 Nov 2026 17:13:40 -0500
Subject: [PATCH 2/2] docs(tests): describe thumbnail queue regression (#6318)

---
 crates/ui-egui/src/panels/layers/thumbs.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/ui-egui/src/panels/layers/thumbs.rs b/crates/ui-egui/src/panels/layers/thumbs.rs
index 2a6d010b9..2f1587813 100644
--- a/crates/ui-egui/src/panels/layers/thumbs.rs
+++ b/crates/ui-egui/src/panels/layers/thumbs.rs
@@ -928,6 +928,7 @@ mod tests {
         thumbs.receive(ctx, done);
     }
 
+    /// Prioritize the shown document’s thumbnails, requeue them when revisited, and retain cached rows.
     #[test]
     fn the_shown_documents_thumbnails_are_made_before_the_queued_ones_of_another() {
         let ctx = egui::Context::default();