Function waitForReplToStart

integration/repl/e2e/repl-process.spec.ts:16–43

(
    process: ReturnType<typeof spawn>,
    message,
    timeout = 10000,
  )

  let replProcess: ReturnType<typeof spawn>;

  function waitForReplToStart(
    process: ReturnType<typeof spawn>,
    message,
    timeout = 10000,
  ): Promise<void> {
    return new Promise((resolve, reject) => {
      const timer = setTimeout(() => {
        reject(new Error('REPL did not start in time'));
      }, timeout);

      if (!process.stdout || !process.stderr) {
        return reject(new Error('REPL stdout or stderr is not available'));
      }
      process.stdout.on('data', data => {
        if (data.toString().includes(message)) {
          clearTimeout(timer);
          resolve();
        }
      });

      process.stderr.on('data', data => {
        if (data.toString().includes(message)) {
          clearTimeout(timer);
          reject(new Error(`REPL started with error: ${data}`));
        }
      });
    });
  }

  beforeEach(async function () {
    this.timeout(15000);