node/test/parallel/test-debug-signal-cluster.js

var common = require('../common');
var assert = require('assert');
var spawn = require('child_process').spawn;

var port = common.PORT + 42;
var args = ['--debug-port=' + port,
            common.fixturesDir + '/clustered-server/app.js'];
var options = { stdio: ['inherit', 'inherit', 'pipe', 'ipc'] };
var child = spawn(process.execPath, args, options);

var outputLines = [];
var outputTimerId;
var waitingForDebuggers = false;

var pids = null;

child.stderr.on('data', function(data) {
  var lines = data.toString().replace(/\r/g, '').trim().split('\n');
  var line = lines[0];

  lines.forEach(function(ln) { console.log('> ' + ln) } );

  if (outputTimerId !== undefined)
    clearTimeout(outputTimerId);

  if (waitingForDebuggers) {
    outputLines = outputLines.concat(lines);
    outputTimerId = setTimeout(onNoMoreLines, 800);
  } else if (line === 'all workers are running') {
    child.on('message', function(msg) {
      if (msg.type !== 'pids')
        return;

      pids = msg.pids;
      console.error('got pids %j', pids);

      waitingForDebuggers = true;
      process._debugProcess(child.pid);
    });

    child.send({
      type: 'getpids'
    });
  }
});

function onNoMoreLines() {
  assertOutputLines();
  process.exit();
}

setTimeout(function testTimedOut() {
  assert(false, 'test timed out.');
}, 6000);

process.on('exit', function onExit() {
  // Kill processes in reverse order to avoid timing problems on Windows where
  // the parent process is killed before the children.
  pids.reverse().forEach(function(pid) {
    process.kill(pid);
  });
});

function assertOutputLines() {
  var expectedLines = [
    'Starting debugger agent.',
    'Debugger listening on port ' + (port + 0),
    'Starting debugger agent.',
    'Debugger listening on port ' + (port + 1),
    'Starting debugger agent.',
    'Debugger listening on port ' + (port + 2),
  ];

  // Do not assume any particular order of output messages,
  // since workers can take different amout of time to
  // start up
  outputLines.sort();
  expectedLines.sort();

  assert.equal(outputLines.length, expectedLines.length);
  for (var i = 0; i < expectedLines.length; i++)
    assert.equal(outputLines[i], expectedLines[i]);
}