refactor(test): centralize temp home + polling

test/helpers/poll.ts

@@ -0,0 +1,25 @@
+export type PollOptions = {
+  timeoutMs?: number;
+  intervalMs?: number;
+};
+
+function sleep(ms: number) {
+  return new Promise<void>((resolve) => setTimeout(resolve, ms));
+}
+
+export async function pollUntil<T>(
+  fn: () => Promise<T | null | undefined>,
+  opts: PollOptions = {},
+): Promise<T | undefined> {
+  const timeoutMs = opts.timeoutMs ?? 2000;
+  const intervalMs = opts.intervalMs ?? 25;
+  const start = Date.now();
+
+  while (Date.now() - start < timeoutMs) {
+    const value = await fn();
+    if (value !== null && value !== undefined) return value;
+    await sleep(intervalMs);
+  }
+
+  return undefined;
+}