test(infra): skip real recovery pacing waits (#109338)

test/helpers/infra/delivery-recovery.ts

@@ -0,0 +1,31 @@
+// Controls mocked recovery sleeps so tests prove callers stay blocked until release.
+import { vi } from "vitest";
+
+type SleepMock = {
+  mockImplementation(implementation: (ms: number) => Promise<void>): unknown;
+};
+
+export function controlNextRecoverySleep(sleepMock: SleepMock) {
+  let releaseSleep: (() => void) | undefined;
+  const started = new Promise<number>((resolveStarted) => {
+    sleepMock.mockImplementation(
+      (ms) =>
+        new Promise<void>((resolve) => {
+          releaseSleep = () => {
+            vi.setSystemTime(Date.now() + ms);
+            resolve();
+          };
+          resolveStarted(ms);
+        }),
+    );
+  });
+  return {
+    started,
+    release() {
+      if (!releaseSleep) {
+        throw new Error("Expected recovery sleep to start before release");
+      }
+      releaseSleep();
+    },
+  };
+}