Function record

packages/core/sdk/src/executor.test.ts:817–830

(key: string, run: () => Promise<A>)

  let targets: ReadonlySet<string> = new Set();
  const events: string[] = [];
  const record = <A>(key: string, run: () => Promise<A>): Promise<A> => {
    if (!targets.has(key)) return run();
    events.push(`start:${key}`);
    return run()
      .then(
        (result) =>
          new Promise<A>((resolve) => {
            setImmediate(() => resolve(result));
          }),
      )
      .finally(() => {
        events.push(`end:${key}`);
      });
  };
  return {
    arm: (keys: readonly string[]) => {
      targets = new Set(keys);