test: avoid timer hangs in cron tests

src/gateway/server.cron.test.ts

@@ -13,6 +13,11 @@ import {
 
 installGatewayTestHooks();
 
+async function yieldToEventLoop() {
+  // Avoid relying on timers (fake timers can leak between tests).
+  await fs.stat(process.cwd()).catch(() => {});
+}
+
 describe("gateway server cron", () => {
   test("supports cron.add and cron.list", async () => {
     const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-cron-"));
@@ -265,7 +270,7 @@ describe("gateway server cron", () => {
       for (let i = 0; i < 200; i += 1) {
         const raw = await fs.readFile(logPath, "utf-8").catch(() => "");
         if (raw.trim().length > 0) return raw;
-        await new Promise((r) => setTimeout(r, 10));
+        await yieldToEventLoop();
       }
       throw new Error("timeout waiting for cron run log");
     };
@@ -333,7 +338,7 @@ describe("gateway server cron", () => {
       for (let i = 0; i < 200; i += 1) {
         const raw = await fs.readFile(logPath, "utf-8").catch(() => "");
         if (raw.trim().length > 0) return raw;
-        await new Promise((r) => setTimeout(r, 10));
+        await yieldToEventLoop();
       }
       throw new Error("timeout waiting for per-job cron run log");
     };
@@ -414,7 +419,7 @@ describe("gateway server cron", () => {
           expect(runsRes.ok).toBe(true);
           const entries = (runsRes.payload as { entries?: unknown } | null)?.entries;
           if (Array.isArray(entries) && entries.length > 0) return entries;
-          await new Promise((r) => setTimeout(r, 20));
+          await yieldToEventLoop();
         }
         throw new Error("timeout waiting for cron.runs entries");
       };