text: 'use strict';
  var common = require('../common');
  var assert = require('assert');
  var v8 = require('v8');
  
  var s = v8.getHeapStatistics();
  var keys = [
    'heap_size_limit',
    'total_heap_size',
    'total_heap_size_executable',
    'total_physical_size',
    'used_heap_size'];
  assert.deepEqual(Object.keys(s).sort(), keys);
  keys.forEach(function(key) {
    assert.equal(typeof s[key], 'number');
  });
  