fix(core): don't reposition the suggestion menu on its own scroll - #3188

tests/src/end-to-end/slashmenu/suggestionMenuScroll.test.tsx (1)

72-83: 🎯 Functional Correctness | 🔵 Trivial | ⚡ Quick win

Add coverage for scrolling a containing ancestor.

The new tests cover only the menu and the document. A scrollable ancestor of the editor can move the trigger and must also update the menu position. Add a test that scrolls such an ancestor and observes a suggestion-menu update.

Suggested fix

+function AncestorScrollingEditor() {
+  editor = useCreateBlockNote({
+    initialContent: Array.from({ length: 40 }, (_, i) => ({
+      type: "paragraph" as const,
+      content: `Paragraph ${i}`,
+    })),
+  });
+  return (
+    <div data-test="ancestor-scroller" style={{ height: 200, overflow: "auto" }}>
+      <BlockNoteView editor={editor} />
+    </div>
+  );
+}
+
+test("scrolling a containing ancestor updates the slash menu's position", async () => {
+  await render(<AncestorScrollingEditor />);
+  await waitForSelector(".bn-editor");
+  await openSlashMenuAt(80);
+  const counter = countMenuUpdates();
+  const scroller = await waitForSelector("[data-test=ancestor-scroller]");
+
+  scroller.scrollTop += 50;
+  await vi.waitFor(() => expect(counter.updates).toBeGreaterThan(0));
+});

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Review comment at @tests/src/end-to-end/slashmenu/suggestionMenuScroll.test.tsx
around lines 72 - 83:
Add a test alongside the existing document-scroll test that renders an editor
inside a scrollable ancestor, opens the slash menu, scrolls that ancestor, and
asserts the menu update counter increases. Use the existing render,
menu-opening, selector-waiting, and update-count helpers.

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