Function startCLI

test/common/debugger.js:21–189

(args, flags = [], spawnOpts = {}, opts = { randomPort: true })

}

function startCLI(args, flags = [], spawnOpts = {}, opts = { randomPort: true }) {
  let stderrOutput = '';
  const child = spawn(process.execPath, [
    ...flags,
    'inspect',
    ...(opts.randomPort !== false ? ['--port=0'] : []),
    ...args,
  ], spawnOpts);

  const outputBuffer = [];
  function bufferOutput(chunk) {
    if (this === child.stderr) {
      stderrOutput += chunk;
    }
    outputBuffer.push(chunk);
  }

  function getOutput() {
    return outputBuffer.join('\n').replaceAll('\b', '');
  }

  child.stdout.setEncoding('utf8');
  child.stdout.on('data', bufferOutput);
  child.stderr.setEncoding('utf8');
  child.stderr.on('data', bufferOutput);

  if (process.env.VERBOSE === '1') {
    child.stdout.pipe(process.stdout);
    child.stderr.pipe(process.stderr);
  }

  return {
    flushOutput() {
      const output = this.output;
      outputBuffer.length = 0;
      return output;
    },

    waitFor(pattern) {
      function checkPattern(str) {
        if (Array.isArray(pattern)) {
          return pattern.every((p) => p.test(str));
        }
        return pattern.test(str);
      }

      return new Promise((resolve, reject) => {
        function checkOutput() {
          if (checkPattern(getOutput())) {
            tearDown();
            resolve();
          }
        }

        function onChildClose(code, signal) {
          tearDown();
          let message = 'Child exited';
          if (code) {