From e4a2ab8f7208620c597b05672ce7cdbb69e6f98b Mon Sep 17 00:00:00 2001
From: Theo Browne <me@theo.li>
Date: Fri, 23 Oct 2026 00:08:37 -0700
Subject: [PATCH] test(client-runtime): restore render scheduler tests deleted
 in the test snap

---
 .../src/device/renderScheduler.test.ts        | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 packages/client-runtime/src/device/renderScheduler.test.ts

diff --git a/packages/client-runtime/src/device/renderScheduler.test.ts b/packages/client-runtime/src/device/renderScheduler.test.ts
new file mode 100644
index 000000000000..9a3e98db7e42
--- /dev/null
+++ b/packages/client-runtime/src/device/renderScheduler.test.ts
@@ -0,0 +1,27 @@
+import { expect, it, vi } from "vite-plus/test";
+import { createRenderScheduler } from "./renderScheduler.ts";
+
+it("coalesces frame and pointer invalidations, then stops scheduling when idle or disposed", () => {
+  const callbacks: FrameRequestCallback[] = [];
+  const request = vi.fn((callback: FrameRequestCallback) => {
+    callbacks.push(callback);
+    return callbacks.length;
+  });
+  const cancel = vi.fn();
+  const render = vi.fn();
+  const scheduler = createRenderScheduler(render, request, cancel);
+  scheduler.invalidate();
+  scheduler.invalidate();
+  expect(request).toHaveBeenCalledTimes(1);
+  callbacks[0]?.(0);
+  expect(render).toHaveBeenCalledTimes(1);
+  expect(request).toHaveBeenCalledTimes(1);
+  scheduler.invalidate();
+  scheduler.dispose();
+  scheduler.dispose();
+  scheduler.invalidate();
+  callbacks[1]?.(0);
+  expect(cancel).toHaveBeenCalledExactlyOnceWith(2);
+  expect(render).toHaveBeenCalledTimes(1);
+  expect(request).toHaveBeenCalledTimes(2);
+});