Function isServerUp

packages/render/e2e/integrations.spec.ts:26–52

(url: string)

const waitForServer = async (url: string, timeout: number) => {
  const start = Date.now();
  const isServerUp = (url: string) => {
    return new Promise<boolean>((resolve) => {
      let settled = false;
      const settle = (value: boolean) => {
        if (!settled) {
          settled = true;
          resolve(value);
        }
      };
      const request = http
        .get(url, { timeout: 1000 }, (response) => {
          response.resume();
          settle(
            response.statusCode !== undefined &&
              response.statusCode >= 200 &&
              response.statusCode < 300,
          );
        })
        .on('timeout', () => {
          request.destroy();
          settle(false);
        })
        .on('error', () => {
          settle(false);
        });
    });
  };
  while (Date.now() - start < timeout) {
    if (await isServerUp(url)) {
      return;