throw.js

var fs = require('fs')
var n = +(process.argv[2]) || 1000
var semis = new Array(n).join(';')
fs.writeFileSync('so-safe.js', semis + 'throw new Error("safety");\n')
var spawn = require('child_process').spawn
spawn(process.execPath, [__dirname + '/so-safe.js'], {
  stdio: 'inherit'
}).on('close', function (code, signal) {
  fs.unlinkSync('so-safe.js')
  if (code)
    console.log('TAP version 13\n1..1\nok - exited with code')
  else if (signal) {
    process.kill(process.pid, signal)
    setTimeout(function () {}, 1000)
  } else {
    console.log('TAP version 13\n1..1\nnot ok - expected error code')
    process.exit(1)
  }
})