Function waitForHttpOk

src/__tests__/test-utils/loopback.ts:82–105

(url: string, timeoutMs: number)

}

export function waitForHttpOk(url: string, timeoutMs: number): Promise<void> {
  const deadline = Date.now() + timeoutMs;
  return new Promise((resolve, reject) => {
    const attempt = () => {
      const req = http.get(url, (res) => {
        res.resume();
        if ((res.statusCode ?? 500) < 500) {
          resolve();
          return;
        }
        retry();
      });
      req.on('error', retry);
    };
    const retry = () => {
      if (Date.now() >= deadline) {
        reject(new Error(`Timed out waiting for ${url}.`));
        return;
      }
      setTimeout(attempt, 25);
    };
    attempt();
  });
}