text: 'use strict';
  var common = require('../common');
  var assert = require('assert');
  var spawn = require('child_process').spawn;
  var path = require('path');
  
  var exitScript = path.join(common.fixturesDir, 'exit.js');
  var exitChild = spawn(process.argv[0], [exitScript, 23]);
  exitChild.on('exit', common.mustCall(function(code, signal) {
    assert.strictEqual(code, 23);
    assert.strictEqual(signal, null);
  }));
  
  
  var errorScript = path.join(common.fixturesDir,
                              'child_process_should_emit_error.js');
  var errorChild = spawn(process.argv[0], [errorScript]);
  errorChild.on('exit', common.mustCall(function(code, signal) {
    assert.ok(code !== 0);
    assert.strictEqual(signal, null);
  }));
  