Function startDevServer

src/test/framework/reactTest.ts:103–130

(projectFolder: string)

}

async function startDevServer(projectFolder: string): Promise<cp.ChildProcessWithoutNullStreams> {
  const devServerListening = getDeferred();
  const devServerProc = cp.spawn('npm', ['run-script', 'start'], {
    env: { ...process.env, BROWSER: 'none', SKIP_PREFLIGHT_CHECK: 'true' },
    cwd: projectFolder,
    stdio: 'pipe',
  });
  const timer = setTimeout(() => {
    console.log('Did not get recognized dev server output, continuing');
    devServerListening.resolve(undefined);
  }, 10000);
  devServerProc.stdout.on('data', d => {
    d = d.toString();
    if (d.includes('You can now view')) {
      console.log('Detected CRA dev server started');
      devServerListening.resolve(undefined);
    } else if (d.includes('Something is already')) {
      devServerListening.reject(new Error('Failed to start the dev server: ' + d));
    }

    console.log(d.toString().replace(/\r?\n$/, ''));
  });
  devServerProc.stderr.on('data', d => console.error(d.toString().replace(/\r?\n$/, '')));
  await devServerListening.promise;
  clearTimeout(timer);

  return devServerProc;
}