test(plugin-detail): gate RelatedList's client-mode sort-button case on the object schema (objectui#10895)

.changeset/10895-plugin-detail-relatedlist-client-sort-gate.md

@@ -0,0 +1,9 @@
+---
+---
+
+Test-only, no package released: `RelatedList.unmaterializedSort.test.tsx`'s case "keeps that button in
+client mode" now awaits the object schema before it reads the `Total` sort button. Since
+objectui#10728 the sort-button row reads the masked stamp, which covers every column until
+`getObjectSchema` resolves, and the case gated only on the view type, which client mode reaches on the
+first commit. So whether the button existed when it was read depended on scheduling; on one merge-queue
+build it did not (objectui#10895). No source file changes.

packages/plugin-detail/src/__tests__/RelatedList.unmaterializedSort.test.tsx

@@ -216,8 +216,11 @@ describe('RelatedList — the sort-button row for a `list` card (#3950)', () =>
   });
 
   it('keeps that button in client mode', async () => {
-    renderList({ type: 'list', data: items });
+    const dataSource = renderList({ type: 'list', data: items });
     await waitFor(() => expect(h.schema?.type).toBe('data-list'));
+    // Since objectui#10728 the sort-button row reads the masked stamp, which
+    // covers every column until the object schema lands (#7007).
+    await settleObjectSchema(dataSource);
 
     expect(screen.getByRole('button', { name: /Total/ })).toBeTruthy();
   });