Move the tests from .html to .sky

sky/tests/resources/chai.html

-<script>
-
-// FIXME: This really could be trimmed down from all the generic and commonjs crap.
-
-;(function(){
-
-/**
- * Require the given path.
- *
- * @param {String} path
- * @return {Object} exports
- * @api public
- */
-
-function require(path, parent, orig) {
-  var resolved = require.resolve(path);
-
-  // lookup failed
-  if (null == resolved) {
-    orig = orig || path;
-    parent = parent || 'root';
-    var err = new Error('Failed to require "' + orig + '" from "' + parent + '"');
-    err.path = orig;
-    err.parent = parent;
-    err.require = true;
-    throw err;
-  }
-
-  var module = require.modules[resolved];
-
-  // perform real require()
-  // by invoking the module's
-  // registered function
-  if (!module._resolving && !module.exports) {
-    var mod = {};
-    mod.exports = {};
-    mod.client = mod.component = true;
-    module._resolving = true;
-    module.call(this, mod.exports, require.relative(resolved), mod);
-    delete module._resolving;
-    module.exports = mod.exports;
-  }
-
-  return module.exports;
-}
-
-/**
- * Registered modules.
- */
-
-require.modules = {};
-
-/**
- * Registered aliases.
- */
-
-require.aliases = {};
-
-/**
- * Resolve `path`.
- *
- * Lookup:
- *
- *   - PATH/index.js
- *   - PATH.js
- *   - PATH
- *
- * @param {String} path
- * @return {String} path or null
- * @api private
- */
-
-require.resolve = function(path) {
-  if (path.charAt(0) === '/') path = path.slice(1);
-
-  var paths = [
-    path,
-    path + '.js',
-    path + '.json',
-    path + '/index.js',
-    path + '/index.json'
-  ];
-
-  for (var i = 0; i < paths.length; i++) {
-    var path = paths[i];
-    if (require.modules.hasOwnProperty(path)) return path;
-    if (require.aliases.hasOwnProperty(path)) return require.aliases[path];
-  }
-};
-
-/**
- * Normalize `path` relative to the current path.
- *
- * @param {String} curr
- * @param {String} path
- * @return {String}
- * @api private
- */
-
-require.normalize = function(curr, path) {
-  var segs = [];
-
-  if ('.' != path.charAt(0)) return path;
-
-  curr = curr.split('/');
-  path = path.split('/');
-
-  for (var i = 0; i < path.length; ++i) {
-    if ('..' == path[i]) {
-      curr.pop();
-    } else if ('.' != path[i] && '' != path[i]) {
-      segs.push(path[i]);
-    }
-  }
-
-  return curr.concat(segs).join('/');
-};
-
-/**
- * Register module at `path` with callback `definition`.
- *
- * @param {String} path
- * @param {Function} definition
- * @api private
- */
-
-require.register = function(path, definition) {
-  require.modules[path] = definition;
-};
-
-/**
- * Alias a module definition.
- *
- * @param {String} from
- * @param {String} to
- * @api private
- */
-
-require.alias = function(from, to) {
-  if (!require.modules.hasOwnProperty(from)) {
-    throw new Error('Failed to alias "' + from + '", it does not exist');
-  }
-  require.aliases[to] = from;
-};
-
-/**
- * Return a require function relative to the `parent` path.
- *
- * @param {String} parent
- * @return {Function}
- * @api private
- */
-
-require.relative = function(parent) {
-  var p = require.normalize(parent, '..');
-
-  /**
-   * lastIndexOf helper.
-   */
-
-  function lastIndexOf(arr, obj) {
-    var i = arr.length;
-    while (i--) {
-      if (arr[i] === obj) return i;
-    }
-    return -1;
-  }
-
-  /**
-   * The relative require() itself.
-   */
-
-  function localRequire(path) {
-    var resolved = localRequire.resolve(path);
-    return require(resolved, parent, path);
-  }
-
-  /**
-   * Resolve relative to the parent.
-   */
-
-  localRequire.resolve = function(path) {
-    var c = path.charAt(0);
-    if ('/' == c) return path.slice(1);
-    if ('.' == c) return require.normalize(p, path);
-
-    // resolve deps by returning
-    // the dep in the nearest "deps"
-    // directory
-    var segs = parent.split('/');
-    var i = lastIndexOf(segs, 'deps') + 1;
-    if (!i) i = 0;
-    path = segs.slice(0, i + 1).join('/') + '/deps/' + path;
-    return path;
-  };
-
-  /**
-   * Check if module is defined at `path`.
-   */
-
-  localRequire.exists = function(path) {
-    return require.modules.hasOwnProperty(localRequire.resolve(path));
-  };
-
-  return localRequire;
-};
-require.register("chaijs-assertion-error/index.js", function(exports, require, module){
-/*!
- * assertion-error
- * Copyright(c) 2013 Jake Luer <jake@qualiancy.com>
- * MIT Licensed
- */
-
-/*!
- * Return a function that will copy properties from
- * one object to another excluding any originally
- * listed. Returned function will create a new `{}`.
- *
- * @param {String} excluded properties ...
- * @return {Function}
- */
-
-function exclude () {
-  var excludes = [].slice.call(arguments);
-
-  function excludeProps (res, obj) {
-    Object.keys(obj).forEach(function (key) {
-      if (!~excludes.indexOf(key)) res[key] = obj[key];
-    });
-  }
-
-  return function extendExclude () {
-    var args = [].slice.call(arguments)
-      , i = 0
-      , res = {};
-
-    for (; i < args.length; i++) {
-      excludeProps(res, args[i]);
-    }
-
-    return res;
-  };
-};
-
-/*!
- * Primary Exports
- */
-
-module.exports = AssertionError;
-
-/**
- * ### AssertionError
- *
- * An extension of the JavaScript `Error` constructor for
- * assertion and validation scenarios.
- *
- * @param {String} message
- * @param {Object} properties to include (optional)
- * @param {callee} start stack function (optional)
- */
-
-function AssertionError (message, _props, ssf) {
-  var extend = exclude('name', 'message', 'stack', 'constructor', 'toJSON')
-    , props = extend(_props || {});
-
-  // default values
-  this.message = message || 'Unspecified AssertionError';
-  this.showDiff = false;
-
-  // copy from properties
-  for (var key in props) {
-    this[key] = props[key];
-  }
-
-  // capture stack trace
-  if (ssf && Error.captureStackTrace) {
-    // FIXME(sky): This can't work in sky because of strict mode.
-    ssf = ssf || arguments.callee;
-    if (ssf)
-      Error.captureStackTrace(this, ssf);
-  }
-}
-
-/*!
- * Inherit from Error.prototype
- */
-
-AssertionError.prototype = Object.create(Error.prototype);
-
-/*!
- * Statically set name
- */
-
-AssertionError.prototype.name = 'AssertionError';
-
-/*!
- * Ensure correct constructor
- */
-
-AssertionError.prototype.constructor = AssertionError;
-
-/**
- * Allow errors to be converted to JSON for static transfer.
- *
- * @param {Boolean} include stack (default: `true`)
- * @return {Object} object that can be `JSON.stringify`
- */
-
-AssertionError.prototype.toJSON = function (stack) {
-  var extend = exclude('constructor', 'toJSON', 'stack')
-    , props = extend({ name: this.name }, this);
-
-  // include stack if exists and not turned off
-  if (false !== stack && this.stack) {
-    props.stack = this.stack;
-  }
-
-  return props;
-};
-
-});
-require.register("chaijs-type-detect/lib/type.js", function(exports, require, module){
-/*!
- * type-detect
- * Copyright(c) 2013 jake luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Primary Exports
- */
-
-var exports = module.exports = getType;
-
-/*!
- * Detectable javascript natives
- */
-
-var natives = {
-    '[object Array]': 'array'
-  , '[object RegExp]': 'regexp'
-  , '[object Function]': 'function'
-  , '[object Arguments]': 'arguments'
-  , '[object Date]': 'date'
-};
-
-/**
- * ### typeOf (obj)
- *
- * Use several different techniques to determine
- * the type of object being tested.
- *
- *
- * @param {Mixed} object
- * @return {String} object type
- * @api public
- */
-
-function getType (obj) {
-  var str = Object.prototype.toString.call(obj);
-  if (natives[str]) return natives[str];
-  if (obj === null) return 'null';
-  if (obj === undefined) return 'undefined';
-  if (obj === Object(obj)) return 'object';
-  return typeof obj;
-}
-
-exports.Library = Library;
-
-/**
- * ### Library
- *
- * Create a repository for custom type detection.
- *
- * ```js
- * var lib = new type.Library;
- * ```
- *
- */
-
-function Library () {
-  this.tests = {};
-}
-
-/**
- * #### .of (obj)
- *
- * Expose replacement `typeof` detection to the library.
- *
- * ```js
- * if ('string' === lib.of('hello world')) {
- *   // ...
- * }
- * ```
- *
- * @param {Mixed} object to test
- * @return {String} type
- */
-
-Library.prototype.of = getType;
-
-/**
- * #### .define (type, test)
- *
- * Add a test to for the `.test()` assertion.
- *
- * Can be defined as a regular expression:
- *
- * ```js
- * lib.define('int', /^[0-9]+$/);
- * ```
- *
- * ... or as a function:
- *
- * ```js
- * lib.define('bln', function (obj) {
- *   if ('boolean' === lib.of(obj)) return true;
- *   var blns = [ 'yes', 'no', 'true', 'false', 1, 0 ];
- *   if ('string' === lib.of(obj)) obj = obj.toLowerCase();
- *   return !! ~blns.indexOf(obj);
- * });
- * ```
- *
- * @param {String} type
- * @param {RegExp|Function} test
- * @api public
- */
-
-Library.prototype.define = function (type, test) {
-  if (arguments.length === 1) return this.tests[type];
-  this.tests[type] = test;
-  return this;
-};
-
-/**
- * #### .test (obj, test)
- *
- * Assert that an object is of type. Will first
- * check natives, and if that does not pass it will
- * use the user defined custom tests.
- *
- * ```js
- * assert(lib.test('1', 'int'));
- * assert(lib.test('yes', 'bln'));
- * ```
- *
- * @param {Mixed} object
- * @param {String} type
- * @return {Boolean} result
- * @api public
- */
-
-Library.prototype.test = function (obj, type) {
-  if (type === getType(obj)) return true;
-  var test = this.tests[type];
-
-  if (test && 'regexp' === getType(test)) {
-    return test.test(obj);
-  } else if (test && 'function' === getType(test)) {
-    return test(obj);
-  } else {
-    throw new ReferenceError('Type test "' + type + '" not defined or invalid.');
-  }
-};
-
-});
-require.register("chaijs-deep-eql/lib/eql.js", function(exports, require, module){
-/*!
- * deep-eql
- * Copyright(c) 2013 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependencies
- */
-
-var type = require('type-detect');
-
-/*!
- * Buffer.isBuffer browser shim
- */
-
-var Buffer;
-try { Buffer = require('buffer').Buffer; }
-catch(ex) {
-  Buffer = {};
-  Buffer.isBuffer = function() { return false; }
-}
-
-/*!
- * Primary Export
- */
-
-module.exports = deepEqual;
-
-/**
- * Assert super-strict (egal) equality between
- * two objects of any type.
- *
- * @param {Mixed} a
- * @param {Mixed} b
- * @param {Array} memoised (optional)
- * @return {Boolean} equal match
- */
-
-function deepEqual(a, b, m) {
-  if (sameValue(a, b)) {
-    return true;
-  } else if ('date' === type(a)) {
-    return dateEqual(a, b);
-  } else if ('regexp' === type(a)) {
-    return regexpEqual(a, b);
-  } else if (Buffer.isBuffer(a)) {
-    return bufferEqual(a, b);
-  } else if ('arguments' === type(a)) {
-    return argumentsEqual(a, b, m);
-  } else if (!typeEqual(a, b)) {
-    return false;
-  } else if (('object' !== type(a) && 'object' !== type(b))
-  && ('array' !== type(a) && 'array' !== type(b))) {
-    return sameValue(a, b);
-  } else {
-    return objectEqual(a, b, m);
-  }
-}
-
-/*!
- * Strict (egal) equality test. Ensures that NaN always
- * equals NaN and `-0` does not equal `+0`.
- *
- * @param {Mixed} a
- * @param {Mixed} b
- * @return {Boolean} equal match
- */
-
-function sameValue(a, b) {
-  if (a === b) return a !== 0 || 1 / a === 1 / b;
-  return a !== a && b !== b;
-}
-
-/*!
- * Compare the types of two given objects and
- * return if they are equal. Note that an Array
- * has a type of `array` (not `object`) and arguments
- * have a type of `arguments` (not `array`/`object`).
- *
- * @param {Mixed} a
- * @param {Mixed} b
- * @return {Boolean} result
- */
-
-function typeEqual(a, b) {
-  return type(a) === type(b);
-}
-
-/*!
- * Compare two Date objects by asserting that
- * the time values are equal using `saveValue`.
- *
- * @param {Date} a
- * @param {Date} b
- * @return {Boolean} result
- */
-
-function dateEqual(a, b) {
-  if ('date' !== type(b)) return false;
-  return sameValue(a.getTime(), b.getTime());
-}
-
-/*!
- * Compare two regular expressions by converting them
- * to string and checking for `sameValue`.
- *
- * @param {RegExp} a
- * @param {RegExp} b
- * @return {Boolean} result
- */
-
-function regexpEqual(a, b) {
-  if ('regexp' !== type(b)) return false;
-  return sameValue(a.toString(), b.toString());
-}
-
-/*!
- * Assert deep equality of two `arguments` objects.
- * Unfortunately, these must be sliced to arrays
- * prior to test to ensure no bad behavior.
- *
- * @param {Arguments} a
- * @param {Arguments} b
- * @param {Array} memoize (optional)
- * @return {Boolean} result
- */
-
-function argumentsEqual(a, b, m) {
-  if ('arguments' !== type(b)) return false;
-  a = [].slice.call(a);
-  b = [].slice.call(b);
-  return deepEqual(a, b, m);
-}
-
-/*!
- * Get enumerable properties of a given object.
- *
- * @param {Object} a
- * @return {Array} property names
- */
-
-function enumerable(a) {
-  var res = [];
-  for (var key in a) res.push(key);
-  return res;
-}
-
-/*!
- * Simple equality for flat iterable objects
- * such as Arrays or Node.js buffers.
- *
- * @param {Iterable} a
- * @param {Iterable} b
- * @return {Boolean} result
- */
-
-function iterableEqual(a, b) {
-  if (a.length !==  b.length) return false;
-
-  var i = 0;
-  var match = true;
-
-  for (; i < a.length; i++) {
-    if (a[i] !== b[i]) {
-      match = false;
-      break;
-    }
-  }
-
-  return match;
-}
-
-/*!
- * Extension to `iterableEqual` specifically
- * for Node.js Buffers.
- *
- * @param {Buffer} a
- * @param {Mixed} b
- * @return {Boolean} result
- */
-
-function bufferEqual(a, b) {
-  if (!Buffer.isBuffer(b)) return false;
-  return iterableEqual(a, b);
-}
-
-/*!
- * Block for `objectEqual` ensuring non-existing
- * values don't get in.
- *
- * @param {Mixed} object
- * @return {Boolean} result
- */
-
-function isValue(a) {
-  return a !== null && a !== undefined;
-}
-
-/*!
- * Recursively check the equality of two objects.
- * Once basic sameness has been established it will
- * defer to `deepEqual` for each enumerable key
- * in the object.
- *
- * @param {Mixed} a
- * @param {Mixed} b
- * @return {Boolean} result
- */
-
-function objectEqual(a, b, m) {
-  if (!isValue(a) || !isValue(b)) {
-    return false;
-  }
-
-  if (a.prototype !== b.prototype) {
-    return false;
-  }
-
-  var i;
-  if (m) {
-    for (i = 0; i < m.length; i++) {
-      if ((m[i][0] === a && m[i][1] === b)
-      ||  (m[i][0] === b && m[i][1] === a)) {
-        return true;
-      }
-    }
-  } else {
-    m = [];
-  }
-
-  try {
-    var ka = enumerable(a);
-    var kb = enumerable(b);
-  } catch (ex) {
-    return false;
-  }
-
-  ka.sort();
-  kb.sort();
-
-  if (!iterableEqual(ka, kb)) {
-    return false;
-  }
-
-  m.push([ a, b ]);
-
-  var key;
-  for (i = ka.length - 1; i >= 0; i--) {
-    key = ka[i];
-    if (!deepEqual(a[key], b[key], m)) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-});
-require.register("chai/index.js", function(exports, require, module){
-module.exports = require('./lib/chai');
-
-});
-require.register("chai/lib/chai.js", function(exports, require, module){
-/*!
- * chai
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-var used = []
-  , exports = module.exports = {};
-
-/*!
- * Chai version
- */
-
-exports.version = '1.9.1';
-
-/*!
- * Assertion Error
- */
-
-exports.AssertionError = require('assertion-error');
-
-/*!
- * Utils for plugins (not exported)
- */
-
-var util = require('./chai/utils');
-
-/**
- * # .use(function)
- *
- * Provides a way to extend the internals of Chai
- *
- * @param {Function}
- * @returns {this} for chaining
- * @api public
- */
-
-exports.use = function (fn) {
-  if (!~used.indexOf(fn)) {
-    fn(this, util);
-    used.push(fn);
-  }
-
-  return this;
-};
-
-/*!
- * Configuration
- */
-
-var config = require('./chai/config');
-exports.config = config;
-
-/*!
- * Primary `Assertion` prototype
- */
-
-var assertion = require('./chai/assertion');
-exports.use(assertion);
-
-/*!
- * Core Assertions
- */
-
-var core = require('./chai/core/assertions');
-exports.use(core);
-
-/*!
- * Expect interface
- */
-
-var expect = require('./chai/interface/expect');
-exports.use(expect);
-
-/*!
- * Should interface
- */
-
-var should = require('./chai/interface/should');
-exports.use(should);
-
-/*!
- * Assert interface
- */
-
-var assert = require('./chai/interface/assert');
-exports.use(assert);
-
-});
-require.register("chai/lib/chai/assertion.js", function(exports, require, module){
-/*!
- * chai
- * http://chaijs.com
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-var config = require('./config');
-
-module.exports = function (_chai, util) {
-  /*!
-   * Module dependencies.
-   */
-
-  var AssertionError = _chai.AssertionError
-    , flag = util.flag;
-
-  /*!
-   * Module export.
-   */
-
-  _chai.Assertion = Assertion;
-
-  /*!
-   * Assertion Constructor
-   *
-   * Creates object for chaining.
-   *
-   * @api private
-   */
-
-  function Assertion (obj, msg, stack) {
-    flag(this, 'ssfi', stack);
-    flag(this, 'object', obj);
-    flag(this, 'message', msg);
-  }
-
-  Object.defineProperty(Assertion, 'includeStack', {
-    get: function() {
-      console.warn('Assertion.includeStack is deprecated, use chai.config.includeStack instead.');
-      return config.includeStack;
-    },
-    set: function(value) {
-      console.warn('Assertion.includeStack is deprecated, use chai.config.includeStack instead.');
-      config.includeStack = value;
-    }
-  });
-
-  Object.defineProperty(Assertion, 'showDiff', {
-    get: function() {
-      console.warn('Assertion.showDiff is deprecated, use chai.config.showDiff instead.');
-      return config.showDiff;
-    },
-    set: function(value) {
-      console.warn('Assertion.showDiff is deprecated, use chai.config.showDiff instead.');
-      config.showDiff = value;
-    }
-  });
-
-  Assertion.addProperty = function (name, fn) {
-    util.addProperty(this.prototype, name, fn);
-  };
-
-  Assertion.addMethod = function (name, fn) {
-    util.addMethod(this.prototype, name, fn);
-  };
-
-  Assertion.addChainableMethod = function (name, fn, chainingBehavior) {
-    util.addChainableMethod(this.prototype, name, fn, chainingBehavior);
-  };
-
-  Assertion.overwriteProperty = function (name, fn) {
-    util.overwriteProperty(this.prototype, name, fn);
-  };
-
-  Assertion.overwriteMethod = function (name, fn) {
-    util.overwriteMethod(this.prototype, name, fn);
-  };
-
-  Assertion.overwriteChainableMethod = function (name, fn, chainingBehavior) {
-    util.overwriteChainableMethod(this.prototype, name, fn, chainingBehavior);
-  };
-
-  /*!
-   * ### .assert(expression, message, negateMessage, expected, actual)
-   *
-   * Executes an expression and check expectations. Throws AssertionError for reporting if test doesn't pass.
-   *
-   * @name assert
-   * @param {Philosophical} expression to be tested
-   * @param {String} message to display if fails
-   * @param {String} negatedMessage to display if negated expression fails
-   * @param {Mixed} expected value (remember to check for negation)
-   * @param {Mixed} actual (optional) will default to `this.obj`
-   * @api private
-   */
-
-  Assertion.prototype.assert = function (expr, msg, negateMsg, expected, _actual, showDiff) {
-    var ok = util.test(this, arguments);
-    if (true !== showDiff) showDiff = false;
-    if (true !== config.showDiff) showDiff = false;
-
-    if (!ok) {
-      var msg = util.getMessage(this, arguments)
-        , actual = util.getActual(this, arguments);
-      throw new AssertionError(msg, {
-          actual: actual
-        , expected: expected
-        , showDiff: showDiff
-      }, (config.includeStack) ? this.assert : flag(this, 'ssfi'));
-    }
-  };
-
-  /*!
-   * ### ._obj
-   *
-   * Quick reference to stored `actual` value for plugin developers.
-   *
-   * @api private
-   */
-
-  Object.defineProperty(Assertion.prototype, '_obj',
-    { get: function () {
-        return flag(this, 'object');
-      }
-    , set: function (val) {
-        flag(this, 'object', val);
-      }
-  });
-};
-
-});
-require.register("chai/lib/chai/config.js", function(exports, require, module){
-module.exports = {
-
-  /**
-   * ### config.includeStack
-   *
-   * User configurable property, influences whether stack trace
-   * is included in Assertion error message. Default of false
-   * suppresses stack trace in the error message.
-   *
-   *     chai.config.includeStack = true;  // enable stack on error
-   *
-   * @param {Boolean}
-   * @api public
-   */
-
-   includeStack: false,
-
-  /**
-   * ### config.showDiff
-   *
-   * User configurable property, influences whether or not
-   * the `showDiff` flag should be included in the thrown
-   * AssertionErrors. `false` will always be `false`; `true`
-   * will be true when the assertion has requested a diff
-   * be shown.
-   *
-   * @param {Boolean}
-   * @api public
-   */
-
-  showDiff: true,
-
-  /**
-   * ### config.truncateThreshold
-   *
-   * User configurable property, sets length threshold for actual and
-   * expected values in assertion errors. If this threshold is exceeded,
-   * the value is truncated.
-   *
-   * Set it to zero if you want to disable truncating altogether.
-   *
-   *     chai.config.truncateThreshold = 0;  // disable truncating
-   *
-   * @param {Number}
-   * @api public
-   */
-
-  truncateThreshold: 40
-
-};
-
-});
-require.register("chai/lib/chai/core/assertions.js", function(exports, require, module){
-/*!
- * chai
- * http://chaijs.com
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-module.exports = function (chai, _) {
-  var Assertion = chai.Assertion
-    , toString = Object.prototype.toString
-    , flag = _.flag;
-
-  /**
-   * ### Language Chains
-   *
-   * The following are provided as chainable getters to
-   * improve the readability of your assertions. They
-   * do not provide testing capabilities unless they
-   * have been overwritten by a plugin.
-   *
-   * **Chains**
-   *
-   * - to
-   * - be
-   * - been
-   * - is
-   * - that
-   * - and
-   * - has
-   * - have
-   * - with
-   * - at
-   * - of
-   * - same
-   *
-   * @name language chains
-   * @api public
-   */
-
-  [ 'to', 'be', 'been'
-  , 'is', 'and', 'has', 'have'
-  , 'with', 'that', 'at'
-  , 'of', 'same' ].forEach(function (chain) {
-    Assertion.addProperty(chain, function () {
-      return this;
-    });
-  });
-
-  /**
-   * ### .not
-   *
-   * Negates any of assertions following in the chain.
-   *
-   *     expect(foo).to.not.equal('bar');
-   *     expect(goodFn).to.not.throw(Error);
-   *     expect({ foo: 'baz' }).to.have.property('foo')
-   *       .and.not.equal('bar');
-   *
-   * @name not
-   * @api public
-   */
-
-  Assertion.addProperty('not', function () {
-    flag(this, 'negate', true);
-  });
-
-  /**
-   * ### .deep
-   *
-   * Sets the `deep` flag, later used by the `equal` and
-   * `property` assertions.
-   *
-   *     expect(foo).to.deep.equal({ bar: 'baz' });
-   *     expect({ foo: { bar: { baz: 'quux' } } })
-   *       .to.have.deep.property('foo.bar.baz', 'quux');
-   *
-   * @name deep
-   * @api public
-   */
-
-  Assertion.addProperty('deep', function () {
-    flag(this, 'deep', true);
-  });
-
-  /**
-   * ### .a(type)
-   *
-   * The `a` and `an` assertions are aliases that can be
-   * used either as language chains or to assert a value's
-   * type.
-   *
-   *     // typeof
-   *     expect('test').to.be.a('string');
-   *     expect({ foo: 'bar' }).to.be.an('object');
-   *     expect(null).to.be.a('null');
-   *     expect(undefined).to.be.an('undefined');
-   *
-   *     // language chain
-   *     expect(foo).to.be.an.instanceof(Foo);
-   *
-   * @name a
-   * @alias an
-   * @param {String} type
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function an (type, msg) {
-    if (msg) flag(this, 'message', msg);
-    type = type.toLowerCase();
-    var obj = flag(this, 'object')
-      , article = ~[ 'a', 'e', 'i', 'o', 'u' ].indexOf(type.charAt(0)) ? 'an ' : 'a ';
-
-    this.assert(
-        type === _.type(obj)
-      , 'expected #{this} to be ' + article + type
-      , 'expected #{this} not to be ' + article + type
-    );
-  }
-
-  Assertion.addChainableMethod('an', an);
-  Assertion.addChainableMethod('a', an);
-
-  /**
-   * ### .include(value)
-   *
-   * The `include` and `contain` assertions can be used as either property
-   * based language chains or as methods to assert the inclusion of an object
-   * in an array or a substring in a string. When used as language chains,
-   * they toggle the `contain` flag for the `keys` assertion.
-   *
-   *     expect([1,2,3]).to.include(2);
-   *     expect('foobar').to.contain('foo');
-   *     expect({ foo: 'bar', hello: 'universe' }).to.include.keys('foo');
-   *
-   * @name include
-   * @alias contain
-   * @param {Object|String|Number} obj
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function includeChainingBehavior () {
-    flag(this, 'contains', true);
-  }
-
-  function include (val, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    var expected = false;
-    if (_.type(obj) === 'array' && _.type(val) === 'object') {
-      for (var i in obj) {
-        if (_.eql(obj[i], val)) {
-          expected = true;
-          break;
-        }
-      }
-    } else if (_.type(val) === 'object') {
-      if (!flag(this, 'negate')) {
-        for (var k in val) new Assertion(obj).property(k, val[k]);
-        return;
-      }
-      var subset = {}
-      for (var k in val) subset[k] = obj[k]
-      expected = _.eql(subset, val);
-    } else {
-      expected = obj && ~obj.indexOf(val)
-    }
-    this.assert(
-        expected
-      , 'expected #{this} to include ' + _.inspect(val)
-      , 'expected #{this} to not include ' + _.inspect(val));
-  }
-
-  Assertion.addChainableMethod('include', include, includeChainingBehavior);
-  Assertion.addChainableMethod('contain', include, includeChainingBehavior);
-
-  /**
-   * ### .ok
-   *
-   * Asserts that the target is truthy.
-   *
-   *     expect('everthing').to.be.ok;
-   *     expect(1).to.be.ok;
-   *     expect(false).to.not.be.ok;
-   *     expect(undefined).to.not.be.ok;
-   *     expect(null).to.not.be.ok;
-   *
-   * @name ok
-   * @api public
-   */
-
-  Assertion.addProperty('ok', function () {
-    this.assert(
-        flag(this, 'object')
-      , 'expected #{this} to be truthy'
-      , 'expected #{this} to be falsy');
-  });
-
-  /**
-   * ### .true
-   *
-   * Asserts that the target is `true`.
-   *
-   *     expect(true).to.be.true;
-   *     expect(1).to.not.be.true;
-   *
-   * @name true
-   * @api public
-   */
-
-  Assertion.addProperty('true', function () {
-    this.assert(
-        true === flag(this, 'object')
-      , 'expected #{this} to be true'
-      , 'expected #{this} to be false'
-      , this.negate ? false : true
-    );
-  });
-
-  /**
-   * ### .false
-   *
-   * Asserts that the target is `false`.
-   *
-   *     expect(false).to.be.false;
-   *     expect(0).to.not.be.false;
-   *
-   * @name false
-   * @api public
-   */
-
-  Assertion.addProperty('false', function () {
-    this.assert(
-        false === flag(this, 'object')
-      , 'expected #{this} to be false'
-      , 'expected #{this} to be true'
-      , this.negate ? true : false
-    );
-  });
-
-  /**
-   * ### .null
-   *
-   * Asserts that the target is `null`.
-   *
-   *     expect(null).to.be.null;
-   *     expect(undefined).not.to.be.null;
-   *
-   * @name null
-   * @api public
-   */
-
-  Assertion.addProperty('null', function () {
-    this.assert(
-        null === flag(this, 'object')
-      , 'expected #{this} to be null'
-      , 'expected #{this} not to be null'
-    );
-  });
-
-  /**
-   * ### .undefined
-   *
-   * Asserts that the target is `undefined`.
-   *
-   *     expect(undefined).to.be.undefined;
-   *     expect(null).to.not.be.undefined;
-   *
-   * @name undefined
-   * @api public
-   */
-
-  Assertion.addProperty('undefined', function () {
-    this.assert(
-        undefined === flag(this, 'object')
-      , 'expected #{this} to be undefined'
-      , 'expected #{this} not to be undefined'
-    );
-  });
-
-  /**
-   * ### .exist
-   *
-   * Asserts that the target is neither `null` nor `undefined`.
-   *
-   *     var foo = 'hi'
-   *       , bar = null
-   *       , baz;
-   *
-   *     expect(foo).to.exist;
-   *     expect(bar).to.not.exist;
-   *     expect(baz).to.not.exist;
-   *
-   * @name exist
-   * @api public
-   */
-
-  Assertion.addProperty('exist', function () {
-    this.assert(
-        null != flag(this, 'object')
-      , 'expected #{this} to exist'
-      , 'expected #{this} to not exist'
-    );
-  });
-
-
-  /**
-   * ### .empty
-   *
-   * Asserts that the target's length is `0`. For arrays, it checks
-   * the `length` property. For objects, it gets the count of
-   * enumerable keys.
-   *
-   *     expect([]).to.be.empty;
-   *     expect('').to.be.empty;
-   *     expect({}).to.be.empty;
-   *
-   * @name empty
-   * @api public
-   */
-
-  Assertion.addProperty('empty', function () {
-    var obj = flag(this, 'object')
-      , expected = obj;
-
-    if (Array.isArray(obj) || 'string' === typeof object) {
-      expected = obj.length;
-    } else if (typeof obj === 'object') {
-      expected = Object.keys(obj).length;
-    }
-
-    this.assert(
-        !expected
-      , 'expected #{this} to be empty'
-      , 'expected #{this} not to be empty'
-    );
-  });
-
-  /**
-   * ### .arguments
-   *
-   * Asserts that the target is an arguments object.
-   *
-   *     function test () {
-   *       expect(arguments).to.be.arguments;
-   *     }
-   *
-   * @name arguments
-   * @alias Arguments
-   * @api public
-   */
-
-  function checkArguments () {
-    var obj = flag(this, 'object')
-      , type = Object.prototype.toString.call(obj);
-    this.assert(
-        '[object Arguments]' === type
-      , 'expected #{this} to be arguments but got ' + type
-      , 'expected #{this} to not be arguments'
-    );
-  }
-
-  Assertion.addProperty('arguments', checkArguments);
-  Assertion.addProperty('Arguments', checkArguments);
-
-  /**
-   * ### .equal(value)
-   *
-   * Asserts that the target is strictly equal (`===`) to `value`.
-   * Alternately, if the `deep` flag is set, asserts that
-   * the target is deeply equal to `value`.
-   *
-   *     expect('hello').to.equal('hello');
-   *     expect(42).to.equal(42);
-   *     expect(1).to.not.equal(true);
-   *     expect({ foo: 'bar' }).to.not.equal({ foo: 'bar' });
-   *     expect({ foo: 'bar' }).to.deep.equal({ foo: 'bar' });
-   *
-   * @name equal
-   * @alias equals
-   * @alias eq
-   * @alias deep.equal
-   * @param {Mixed} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertEqual (val, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'deep')) {
-      return this.eql(val);
-    } else {
-      this.assert(
-          val === obj
-        , 'expected #{this} to equal #{exp}'
-        , 'expected #{this} to not equal #{exp}'
-        , val
-        , this._obj
-        , true
-      );
-    }
-  }
-
-  Assertion.addMethod('equal', assertEqual);
-  Assertion.addMethod('equals', assertEqual);
-  Assertion.addMethod('eq', assertEqual);
-
-  /**
-   * ### .eql(value)
-   *
-   * Asserts that the target is deeply equal to `value`.
-   *
-   *     expect({ foo: 'bar' }).to.eql({ foo: 'bar' });
-   *     expect([ 1, 2, 3 ]).to.eql([ 1, 2, 3 ]);
-   *
-   * @name eql
-   * @alias eqls
-   * @param {Mixed} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertEql(obj, msg) {
-    if (msg) flag(this, 'message', msg);
-    this.assert(
-        _.eql(obj, flag(this, 'object'))
-      , 'expected #{this} to deeply equal #{exp}'
-      , 'expected #{this} to not deeply equal #{exp}'
-      , obj
-      , this._obj
-      , true
-    );
-  }
-
-  Assertion.addMethod('eql', assertEql);
-  Assertion.addMethod('eqls', assertEql);
-
-  /**
-   * ### .above(value)
-   *
-   * Asserts that the target is greater than `value`.
-   *
-   *     expect(10).to.be.above(5);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a minimum length. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.above(2);
-   *     expect([ 1, 2, 3 ]).to.have.length.above(2);
-   *
-   * @name above
-   * @alias gt
-   * @alias greaterThan
-   * @param {Number} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertAbove (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len > n
-        , 'expected #{this} to have a length above #{exp} but got #{act}'
-        , 'expected #{this} to not have a length above #{exp}'
-        , n
-        , len
-      );
-    } else {
-      this.assert(
-          obj > n
-        , 'expected #{this} to be above ' + n
-        , 'expected #{this} to be at most ' + n
-      );
-    }
-  }
-
-  Assertion.addMethod('above', assertAbove);
-  Assertion.addMethod('gt', assertAbove);
-  Assertion.addMethod('greaterThan', assertAbove);
-
-  /**
-   * ### .least(value)
-   *
-   * Asserts that the target is greater than or equal to `value`.
-   *
-   *     expect(10).to.be.at.least(10);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a minimum length. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.of.at.least(2);
-   *     expect([ 1, 2, 3 ]).to.have.length.of.at.least(3);
-   *
-   * @name least
-   * @alias gte
-   * @param {Number} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertLeast (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len >= n
-        , 'expected #{this} to have a length at least #{exp} but got #{act}'
-        , 'expected #{this} to have a length below #{exp}'
-        , n
-        , len
-      );
-    } else {
-      this.assert(
-          obj >= n
-        , 'expected #{this} to be at least ' + n
-        , 'expected #{this} to be below ' + n
-      );
-    }
-  }
-
-  Assertion.addMethod('least', assertLeast);
-  Assertion.addMethod('gte', assertLeast);
-
-  /**
-   * ### .below(value)
-   *
-   * Asserts that the target is less than `value`.
-   *
-   *     expect(5).to.be.below(10);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a maximum length. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.below(4);
-   *     expect([ 1, 2, 3 ]).to.have.length.below(4);
-   *
-   * @name below
-   * @alias lt
-   * @alias lessThan
-   * @param {Number} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertBelow (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len < n
-        , 'expected #{this} to have a length below #{exp} but got #{act}'
-        , 'expected #{this} to not have a length below #{exp}'
-        , n
-        , len
-      );
-    } else {
-      this.assert(
-          obj < n
-        , 'expected #{this} to be below ' + n
-        , 'expected #{this} to be at least ' + n
-      );
-    }
-  }
-
-  Assertion.addMethod('below', assertBelow);
-  Assertion.addMethod('lt', assertBelow);
-  Assertion.addMethod('lessThan', assertBelow);
-
-  /**
-   * ### .most(value)
-   *
-   * Asserts that the target is less than or equal to `value`.
-   *
-   *     expect(5).to.be.at.most(5);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a maximum length. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.of.at.most(4);
-   *     expect([ 1, 2, 3 ]).to.have.length.of.at.most(3);
-   *
-   * @name most
-   * @alias lte
-   * @param {Number} value
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertMost (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len <= n
-        , 'expected #{this} to have a length at most #{exp} but got #{act}'
-        , 'expected #{this} to have a length above #{exp}'
-        , n
-        , len
-      );
-    } else {
-      this.assert(
-          obj <= n
-        , 'expected #{this} to be at most ' + n
-        , 'expected #{this} to be above ' + n
-      );
-    }
-  }
-
-  Assertion.addMethod('most', assertMost);
-  Assertion.addMethod('lte', assertMost);
-
-  /**
-   * ### .within(start, finish)
-   *
-   * Asserts that the target is within a range.
-   *
-   *     expect(7).to.be.within(5,10);
-   *
-   * Can also be used in conjunction with `length` to
-   * assert a length range. The benefit being a
-   * more informative error message than if the length
-   * was supplied directly.
-   *
-   *     expect('foo').to.have.length.within(2,4);
-   *     expect([ 1, 2, 3 ]).to.have.length.within(2,4);
-   *
-   * @name within
-   * @param {Number} start lowerbound inclusive
-   * @param {Number} finish upperbound inclusive
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('within', function (start, finish, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object')
-      , range = start + '..' + finish;
-    if (flag(this, 'doLength')) {
-      new Assertion(obj, msg).to.have.property('length');
-      var len = obj.length;
-      this.assert(
-          len >= start && len <= finish
-        , 'expected #{this} to have a length within ' + range
-        , 'expected #{this} to not have a length within ' + range
-      );
-    } else {
-      this.assert(
-          obj >= start && obj <= finish
-        , 'expected #{this} to be within ' + range
-        , 'expected #{this} to not be within ' + range
-      );
-    }
-  });
-
-  /**
-   * ### .instanceof(constructor)
-   *
-   * Asserts that the target is an instance of `constructor`.
-   *
-   *     var Tea = function (name) { this.name = name; }
-   *       , Chai = new Tea('chai');
-   *
-   *     expect(Chai).to.be.an.instanceof(Tea);
-   *     expect([ 1, 2, 3 ]).to.be.instanceof(Array);
-   *
-   * @name instanceof
-   * @param {Constructor} constructor
-   * @param {String} message _optional_
-   * @alias instanceOf
-   * @api public
-   */
-
-  function assertInstanceOf (constructor, msg) {
-    if (msg) flag(this, 'message', msg);
-    var name = _.getName(constructor);
-    this.assert(
-        flag(this, 'object') instanceof constructor
-      , 'expected #{this} to be an instance of ' + name
-      , 'expected #{this} to not be an instance of ' + name
-    );
-  };
-
-  Assertion.addMethod('instanceof', assertInstanceOf);
-  Assertion.addMethod('instanceOf', assertInstanceOf);
-
-  /**
-   * ### .property(name, [value])
-   *
-   * Asserts that the target has a property `name`, optionally asserting that
-   * the value of that property is strictly equal to  `value`.
-   * If the `deep` flag is set, you can use dot- and bracket-notation for deep
-   * references into objects and arrays.
-   *
-   *     // simple referencing
-   *     var obj = { foo: 'bar' };
-   *     expect(obj).to.have.property('foo');
-   *     expect(obj).to.have.property('foo', 'bar');
-   *
-   *     // deep referencing
-   *     var deepObj = {
-   *         green: { tea: 'matcha' }
-   *       , teas: [ 'chai', 'matcha', { tea: 'konacha' } ]
-   *     };
-
-   *     expect(deepObj).to.have.deep.property('green.tea', 'matcha');
-   *     expect(deepObj).to.have.deep.property('teas[1]', 'matcha');
-   *     expect(deepObj).to.have.deep.property('teas[2].tea', 'konacha');
-   *
-   * You can also use an array as the starting point of a `deep.property`
-   * assertion, or traverse nested arrays.
-   *
-   *     var arr = [
-   *         [ 'chai', 'matcha', 'konacha' ]
-   *       , [ { tea: 'chai' }
-   *         , { tea: 'matcha' }
-   *         , { tea: 'konacha' } ]
-   *     ];
-   *
-   *     expect(arr).to.have.deep.property('[0][1]', 'matcha');
-   *     expect(arr).to.have.deep.property('[1][2].tea', 'konacha');
-   *
-   * Furthermore, `property` changes the subject of the assertion
-   * to be the value of that property from the original object. This
-   * permits for further chainable assertions on that property.
-   *
-   *     expect(obj).to.have.property('foo')
-   *       .that.is.a('string');
-   *     expect(deepObj).to.have.property('green')
-   *       .that.is.an('object')
-   *       .that.deep.equals({ tea: 'matcha' });
-   *     expect(deepObj).to.have.property('teas')
-   *       .that.is.an('array')
-   *       .with.deep.property('[2]')
-   *         .that.deep.equals({ tea: 'konacha' });
-   *
-   * @name property
-   * @alias deep.property
-   * @param {String} name
-   * @param {Mixed} value (optional)
-   * @param {String} message _optional_
-   * @returns value of property for chaining
-   * @api public
-   */
-
-  Assertion.addMethod('property', function (name, val, msg) {
-    if (msg) flag(this, 'message', msg);
-
-    var descriptor = flag(this, 'deep') ? 'deep property ' : 'property '
-      , negate = flag(this, 'negate')
-      , obj = flag(this, 'object')
-      , value = flag(this, 'deep')
-        ? _.getPathValue(name, obj)
-        : obj[name];
-
-    if (negate && undefined !== val) {
-      if (undefined === value) {
-        msg = (msg != null) ? msg + ': ' : '';
-        throw new Error(msg + _.inspect(obj) + ' has no ' + descriptor + _.inspect(name));
-      }
-    } else {
-      this.assert(
-          undefined !== value
-        , 'expected #{this} to have a ' + descriptor + _.inspect(name)
-        , 'expected #{this} to not have ' + descriptor + _.inspect(name));
-    }
-
-    if (undefined !== val) {
-      this.assert(
-          val === value
-        , 'expected #{this} to have a ' + descriptor + _.inspect(name) + ' of #{exp}, but got #{act}'
-        , 'expected #{this} to not have a ' + descriptor + _.inspect(name) + ' of #{act}'
-        , val
-        , value
-      );
-    }
-
-    flag(this, 'object', value);
-  });
-
-
-  /**
-   * ### .ownProperty(name)
-   *
-   * Asserts that the target has an own property `name`.
-   *
-   *     expect('test').to.have.ownProperty('length');
-   *
-   * @name ownProperty
-   * @alias haveOwnProperty
-   * @param {String} name
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertOwnProperty (name, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    this.assert(
-        obj.hasOwnProperty(name)
-      , 'expected #{this} to have own property ' + _.inspect(name)
-      , 'expected #{this} to not have own property ' + _.inspect(name)
-    );
-  }
-
-  Assertion.addMethod('ownProperty', assertOwnProperty);
-  Assertion.addMethod('haveOwnProperty', assertOwnProperty);
-
-  /**
-   * ### .length(value)
-   *
-   * Asserts that the target's `length` property has
-   * the expected value.
-   *
-   *     expect([ 1, 2, 3]).to.have.length(3);
-   *     expect('foobar').to.have.length(6);
-   *
-   * Can also be used as a chain precursor to a value
-   * comparison for the length property.
-   *
-   *     expect('foo').to.have.length.above(2);
-   *     expect([ 1, 2, 3 ]).to.have.length.above(2);
-   *     expect('foo').to.have.length.below(4);
-   *     expect([ 1, 2, 3 ]).to.have.length.below(4);
-   *     expect('foo').to.have.length.within(2,4);
-   *     expect([ 1, 2, 3 ]).to.have.length.within(2,4);
-   *
-   * @name length
-   * @alias lengthOf
-   * @param {Number} length
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  function assertLengthChain () {
-    flag(this, 'doLength', true);
-  }
-
-  function assertLength (n, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    new Assertion(obj, msg).to.have.property('length');
-    var len = obj.length;
-
-    this.assert(
-        len == n
-      , 'expected #{this} to have a length of #{exp} but got #{act}'
-      , 'expected #{this} to not have a length of #{act}'
-      , n
-      , len
-    );
-  }
-
-  Assertion.addChainableMethod('length', assertLength, assertLengthChain);
-  Assertion.addMethod('lengthOf', assertLength, assertLengthChain);
-
-  /**
-   * ### .match(regexp)
-   *
-   * Asserts that the target matches a regular expression.
-   *
-   *     expect('foobar').to.match(/^foo/);
-   *
-   * @name match
-   * @param {RegExp} RegularExpression
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('match', function (re, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    this.assert(
-        re.exec(obj)
-      , 'expected #{this} to match ' + re
-      , 'expected #{this} not to match ' + re
-    );
-  });
-
-  /**
-   * ### .string(string)
-   *
-   * Asserts that the string target contains another string.
-   *
-   *     expect('foobar').to.have.string('bar');
-   *
-   * @name string
-   * @param {String} string
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('string', function (str, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    new Assertion(obj, msg).is.a('string');
-
-    this.assert(
-        ~obj.indexOf(str)
-      , 'expected #{this} to contain ' + _.inspect(str)
-      , 'expected #{this} to not contain ' + _.inspect(str)
-    );
-  });
-
-
-  /**
-   * ### .keys(key1, [key2], [...])
-   *
-   * Asserts that the target has exactly the given keys, or
-   * asserts the inclusion of some keys when using the
-   * `include` or `contain` modifiers.
-   *
-   *     expect({ foo: 1, bar: 2 }).to.have.keys(['foo', 'bar']);
-   *     expect({ foo: 1, bar: 2, baz: 3 }).to.contain.keys('foo', 'bar');
-   *
-   * @name keys
-   * @alias key
-   * @param {String...|Array} keys
-   * @api public
-   */
-
-  function assertKeys (keys) {
-    var obj = flag(this, 'object')
-      , str
-      , ok = true;
-
-    keys = keys instanceof Array
-      ? keys
-      : Array.prototype.slice.call(arguments);
-
-    if (!keys.length) throw new Error('keys required');
-
-    var actual = Object.keys(obj)
-      , len = keys.length;
-
-    // Inclusion
-    ok = keys.every(function(key){
-      return ~actual.indexOf(key);
-    });
-
-    // Strict
-    if (!flag(this, 'negate') && !flag(this, 'contains')) {
-      ok = ok && keys.length == actual.length;
-    }
-
-    // Key string
-    if (len > 1) {
-      keys = keys.map(function(key){
-        return _.inspect(key);
-      });
-      var last = keys.pop();
-      str = keys.join(', ') + ', and ' + last;
-    } else {
-      str = _.inspect(keys[0]);
-    }
-
-    // Form
-    str = (len > 1 ? 'keys ' : 'key ') + str;
-
-    // Have / include
-    str = (flag(this, 'contains') ? 'contain ' : 'have ') + str;
-
-    // Assertion
-    this.assert(
-        ok
-      , 'expected #{this} to ' + str
-      , 'expected #{this} to not ' + str
-    );
-  }
-
-  Assertion.addMethod('keys', assertKeys);
-  Assertion.addMethod('key', assertKeys);
-
-  /**
-   * ### .throw(constructor)
-   *
-   * Asserts that the function target will throw a specific error, or specific type of error
-   * (as determined using `instanceof`), optionally with a RegExp or string inclusion test
-   * for the error's message.
-   *
-   *     var err = new ReferenceError('This is a bad function.');
-   *     var fn = function () { throw err; }
-   *     expect(fn).to.throw(ReferenceError);
-   *     expect(fn).to.throw(Error);
-   *     expect(fn).to.throw(/bad function/);
-   *     expect(fn).to.not.throw('good function');
-   *     expect(fn).to.throw(ReferenceError, /bad function/);
-   *     expect(fn).to.throw(err);
-   *     expect(fn).to.not.throw(new RangeError('Out of range.'));
-   *
-   * Please note that when a throw expectation is negated, it will check each
-   * parameter independently, starting with error constructor type. The appropriate way
-   * to check for the existence of a type of error but for a message that does not match
-   * is to use `and`.
-   *
-   *     expect(fn).to.throw(ReferenceError)
-   *        .and.not.throw(/good function/);
-   *
-   * @name throw
-   * @alias throws
-   * @alias Throw
-   * @param {ErrorConstructor} constructor
-   * @param {String|RegExp} expected error message
-   * @param {String} message _optional_
-   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-   * @returns error for chaining (null if no error)
-   * @api public
-   */
-
-  function assertThrows (constructor, errMsg, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    new Assertion(obj, msg).is.a('function');
-
-    var thrown = false
-      , desiredError = null
-      , name = null
-      , thrownError = null;
-
-    if (arguments.length === 0) {
-      errMsg = null;
-      constructor = null;
-    } else if (constructor && (constructor instanceof RegExp || 'string' === typeof constructor)) {
-      errMsg = constructor;
-      constructor = null;
-    } else if (constructor && constructor instanceof Error) {
-      desiredError = constructor;
-      constructor = null;
-      errMsg = null;
-    } else if (typeof constructor === 'function') {
-      name = constructor.prototype.name || constructor.name;
-      if (name === 'Error' && constructor !== Error) {
-        name = (new constructor()).name;
-      }
-    } else {
-      constructor = null;
-    }
-
-    try {
-      obj();
-    } catch (err) {
-      // first, check desired error
-      if (desiredError) {
-        this.assert(
-            err === desiredError
-          , 'expected #{this} to throw #{exp} but #{act} was thrown'
-          , 'expected #{this} to not throw #{exp}'
-          , (desiredError instanceof Error ? desiredError.toString() : desiredError)
-          , (err instanceof Error ? err.toString() : err)
-        );
-
-        flag(this, 'object', err);
-        return this;
-      }
-
-      // next, check constructor
-      if (constructor) {
-        this.assert(
-            err instanceof constructor
-          , 'expected #{this} to throw #{exp} but #{act} was thrown'
-          , 'expected #{this} to not throw #{exp} but #{act} was thrown'
-          , name
-          , (err instanceof Error ? err.toString() : err)
-        );
-
-        if (!errMsg) {
-          flag(this, 'object', err);
-          return this;
-        }
-      }
-
-      // next, check message
-      var message = 'object' === _.type(err) && "message" in err
-        ? err.message
-        : '' + err;
-
-      if ((message != null) && errMsg && errMsg instanceof RegExp) {
-        this.assert(
-            errMsg.exec(message)
-          , 'expected #{this} to throw error matching #{exp} but got #{act}'
-          , 'expected #{this} to throw error not matching #{exp}'
-          , errMsg
-          , message
-        );
-
-        flag(this, 'object', err);
-        return this;
-      } else if ((message != null) && errMsg && 'string' === typeof errMsg) {
-        this.assert(
-            ~message.indexOf(errMsg)
-          , 'expected #{this} to throw error including #{exp} but got #{act}'
-          , 'expected #{this} to throw error not including #{act}'
-          , errMsg
-          , message
-        );
-
-        flag(this, 'object', err);
-        return this;
-      } else {
-        thrown = true;
-        thrownError = err;
-      }
-    }
-
-    var actuallyGot = ''
-      , expectedThrown = name !== null
-        ? name
-        : desiredError
-          ? '#{exp}' //_.inspect(desiredError)
-          : 'an error';
-
-    if (thrown) {
-      actuallyGot = ' but #{act} was thrown'
-    }
-
-    this.assert(
-        thrown === true
-      , 'expected #{this} to throw ' + expectedThrown + actuallyGot
-      , 'expected #{this} to not throw ' + expectedThrown + actuallyGot
-      , (desiredError instanceof Error ? desiredError.toString() : desiredError)
-      , (thrownError instanceof Error ? thrownError.toString() : thrownError)
-    );
-
-    flag(this, 'object', thrownError);
-  };
-
-  Assertion.addMethod('throw', assertThrows);
-  Assertion.addMethod('throws', assertThrows);
-  Assertion.addMethod('Throw', assertThrows);
-
-  /**
-   * ### .respondTo(method)
-   *
-   * Asserts that the object or class target will respond to a method.
-   *
-   *     Klass.prototype.bar = function(){};
-   *     expect(Klass).to.respondTo('bar');
-   *     expect(obj).to.respondTo('bar');
-   *
-   * To check if a constructor will respond to a static function,
-   * set the `itself` flag.
-   *
-   *     Klass.baz = function(){};
-   *     expect(Klass).itself.to.respondTo('baz');
-   *
-   * @name respondTo
-   * @param {String} method
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('respondTo', function (method, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object')
-      , itself = flag(this, 'itself')
-      , context = ('function' === _.type(obj) && !itself)
-        ? obj.prototype[method]
-        : obj[method];
-
-    this.assert(
-        'function' === typeof context
-      , 'expected #{this} to respond to ' + _.inspect(method)
-      , 'expected #{this} to not respond to ' + _.inspect(method)
-    );
-  });
-
-  /**
-   * ### .itself
-   *
-   * Sets the `itself` flag, later used by the `respondTo` assertion.
-   *
-   *     function Foo() {}
-   *     Foo.bar = function() {}
-   *     Foo.prototype.baz = function() {}
-   *
-   *     expect(Foo).itself.to.respondTo('bar');
-   *     expect(Foo).itself.not.to.respondTo('baz');
-   *
-   * @name itself
-   * @api public
-   */
-
-  Assertion.addProperty('itself', function () {
-    flag(this, 'itself', true);
-  });
-
-  /**
-   * ### .satisfy(method)
-   *
-   * Asserts that the target passes a given truth test.
-   *
-   *     expect(1).to.satisfy(function(num) { return num > 0; });
-   *
-   * @name satisfy
-   * @param {Function} matcher
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('satisfy', function (matcher, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    this.assert(
-        matcher(obj)
-      , 'expected #{this} to satisfy ' + _.objDisplay(matcher)
-      , 'expected #{this} to not satisfy' + _.objDisplay(matcher)
-      , this.negate ? false : true
-      , matcher(obj)
-    );
-  });
-
-  /**
-   * ### .closeTo(expected, delta)
-   *
-   * Asserts that the target is equal `expected`, to within a +/- `delta` range.
-   *
-   *     expect(1.5).to.be.closeTo(1, 0.5);
-   *
-   * @name closeTo
-   * @param {Number} expected
-   * @param {Number} delta
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('closeTo', function (expected, delta, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-    this.assert(
-        Math.abs(obj - expected) <= delta
-      , 'expected #{this} to be close to ' + expected + ' +/- ' + delta
-      , 'expected #{this} not to be close to ' + expected + ' +/- ' + delta
-    );
-  });
-
-  function isSubsetOf(subset, superset, cmp) {
-    return subset.every(function(elem) {
-      if (!cmp) return superset.indexOf(elem) !== -1;
-
-      return superset.some(function(elem2) {
-        return cmp(elem, elem2);
-      });
-    })
-  }
-
-  /**
-   * ### .members(set)
-   *
-   * Asserts that the target is a superset of `set`,
-   * or that the target and `set` have the same strictly-equal (===) members.
-   * Alternately, if the `deep` flag is set, set members are compared for deep
-   * equality.
-   *
-   *     expect([1, 2, 3]).to.include.members([3, 2]);
-   *     expect([1, 2, 3]).to.not.include.members([3, 2, 8]);
-   *
-   *     expect([4, 2]).to.have.members([2, 4]);
-   *     expect([5, 2]).to.not.have.members([5, 2, 1]);
-   *
-   *     expect([{ id: 1 }]).to.deep.include.members([{ id: 1 }]);
-   *
-   * @name members
-   * @param {Array} set
-   * @param {String} message _optional_
-   * @api public
-   */
-
-  Assertion.addMethod('members', function (subset, msg) {
-    if (msg) flag(this, 'message', msg);
-    var obj = flag(this, 'object');
-
-    new Assertion(obj).to.be.an('array');
-    new Assertion(subset).to.be.an('array');
-
-    var cmp = flag(this, 'deep') ? _.eql : undefined;
-
-    if (flag(this, 'contains')) {
-      return this.assert(
-          isSubsetOf(subset, obj, cmp)
-        , 'expected #{this} to be a superset of #{act}'
-        , 'expected #{this} to not be a superset of #{act}'
-        , obj
-        , subset
-      );
-    }
-
-    this.assert(
-        isSubsetOf(obj, subset, cmp) && isSubsetOf(subset, obj, cmp)
-        , 'expected #{this} to have the same members as #{act}'
-        , 'expected #{this} to not have the same members as #{act}'
-        , obj
-        , subset
-    );
-  });
-};
-
-});
-require.register("chai/lib/chai/interface/assert.js", function(exports, require, module){
-/*!
- * chai
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-
-module.exports = function (chai, util) {
-
-  /*!
-   * Chai dependencies.
-   */
-
-  var Assertion = chai.Assertion
-    , flag = util.flag;
-
-  /*!
-   * Module export.
-   */
-
-  /**
-   * ### assert(expression, message)
-   *
-   * Write your own test expressions.
-   *
-   *     assert('foo' !== 'bar', 'foo is not bar');
-   *     assert(Array.isArray([]), 'empty arrays are arrays');
-   *
-   * @param {Mixed} expression to test for truthiness
-   * @param {String} message to display on error
-   * @name assert
-   * @api public
-   */
-
-  var assert = chai.assert = function (express, errmsg) {
-    var test = new Assertion(null, null, chai.assert);
-    test.assert(
-        express
-      , errmsg
-      , '[ negation message unavailable ]'
-    );
-  };
-
-  /**
-   * ### .fail(actual, expected, [message], [operator])
-   *
-   * Throw a failure. Node.js `assert` module-compatible.
-   *
-   * @name fail
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @param {String} operator
-   * @api public
-   */
-
-  assert.fail = function (actual, expected, message, operator) {
-    message = message || 'assert.fail()';
-    throw new chai.AssertionError(message, {
-        actual: actual
-      , expected: expected
-      , operator: operator
-    }, assert.fail);
-  };
-
-  /**
-   * ### .ok(object, [message])
-   *
-   * Asserts that `object` is truthy.
-   *
-   *     assert.ok('everything', 'everything is ok');
-   *     assert.ok(false, 'this will fail');
-   *
-   * @name ok
-   * @param {Mixed} object to test
-   * @param {String} message
-   * @api public
-   */
-
-  assert.ok = function (val, msg) {
-    new Assertion(val, msg).is.ok;
-  };
-
-  /**
-   * ### .notOk(object, [message])
-   *
-   * Asserts that `object` is falsy.
-   *
-   *     assert.notOk('everything', 'this will fail');
-   *     assert.notOk(false, 'this will pass');
-   *
-   * @name notOk
-   * @param {Mixed} object to test
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notOk = function (val, msg) {
-    new Assertion(val, msg).is.not.ok;
-  };
-
-  /**
-   * ### .equal(actual, expected, [message])
-   *
-   * Asserts non-strict equality (`==`) of `actual` and `expected`.
-   *
-   *     assert.equal(3, '3', '== coerces values to strings');
-   *
-   * @name equal
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.equal = function (act, exp, msg) {
-    var test = new Assertion(act, msg, assert.equal);
-
-    test.assert(
-        exp == flag(test, 'object')
-      , 'expected #{this} to equal #{exp}'
-      , 'expected #{this} to not equal #{act}'
-      , exp
-      , act
-    );
-  };
-
-  /**
-   * ### .notEqual(actual, expected, [message])
-   *
-   * Asserts non-strict inequality (`!=`) of `actual` and `expected`.
-   *
-   *     assert.notEqual(3, 4, 'these numbers are not equal');
-   *
-   * @name notEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notEqual = function (act, exp, msg) {
-    var test = new Assertion(act, msg, assert.notEqual);
-
-    test.assert(
-        exp != flag(test, 'object')
-      , 'expected #{this} to not equal #{exp}'
-      , 'expected #{this} to equal #{act}'
-      , exp
-      , act
-    );
-  };
-
-  /**
-   * ### .strictEqual(actual, expected, [message])
-   *
-   * Asserts strict equality (`===`) of `actual` and `expected`.
-   *
-   *     assert.strictEqual(true, true, 'these booleans are strictly equal');
-   *
-   * @name strictEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.strictEqual = function (act, exp, msg) {
-    new Assertion(act, msg).to.equal(exp);
-  };
-
-  /**
-   * ### .notStrictEqual(actual, expected, [message])
-   *
-   * Asserts strict inequality (`!==`) of `actual` and `expected`.
-   *
-   *     assert.notStrictEqual(3, '3', 'no coercion for strict equality');
-   *
-   * @name notStrictEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notStrictEqual = function (act, exp, msg) {
-    new Assertion(act, msg).to.not.equal(exp);
-  };
-
-  /**
-   * ### .deepEqual(actual, expected, [message])
-   *
-   * Asserts that `actual` is deeply equal to `expected`.
-   *
-   *     assert.deepEqual({ tea: 'green' }, { tea: 'green' });
-   *
-   * @name deepEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.deepEqual = function (act, exp, msg) {
-    new Assertion(act, msg).to.eql(exp);
-  };
-
-  /**
-   * ### .notDeepEqual(actual, expected, [message])
-   *
-   * Assert that `actual` is not deeply equal to `expected`.
-   *
-   *     assert.notDeepEqual({ tea: 'green' }, { tea: 'jasmine' });
-   *
-   * @name notDeepEqual
-   * @param {Mixed} actual
-   * @param {Mixed} expected
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notDeepEqual = function (act, exp, msg) {
-    new Assertion(act, msg).to.not.eql(exp);
-  };
-
-  /**
-   * ### .isTrue(value, [message])
-   *
-   * Asserts that `value` is true.
-   *
-   *     var teaServed = true;
-   *     assert.isTrue(teaServed, 'the tea has been served');
-   *
-   * @name isTrue
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isTrue = function (val, msg) {
-    new Assertion(val, msg).is['true'];
-  };
-
-  /**
-   * ### .isFalse(value, [message])
-   *
-   * Asserts that `value` is false.
-   *
-   *     var teaServed = false;
-   *     assert.isFalse(teaServed, 'no tea yet? hmm...');
-   *
-   * @name isFalse
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isFalse = function (val, msg) {
-    new Assertion(val, msg).is['false'];
-  };
-
-  /**
-   * ### .isNull(value, [message])
-   *
-   * Asserts that `value` is null.
-   *
-   *     assert.isNull(err, 'there was no error');
-   *
-   * @name isNull
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNull = function (val, msg) {
-    new Assertion(val, msg).to.equal(null);
-  };
-
-  /**
-   * ### .isNotNull(value, [message])
-   *
-   * Asserts that `value` is not null.
-   *
-   *     var tea = 'tasty chai';
-   *     assert.isNotNull(tea, 'great, time for tea!');
-   *
-   * @name isNotNull
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotNull = function (val, msg) {
-    new Assertion(val, msg).to.not.equal(null);
-  };
-
-  /**
-   * ### .isUndefined(value, [message])
-   *
-   * Asserts that `value` is `undefined`.
-   *
-   *     var tea;
-   *     assert.isUndefined(tea, 'no tea defined');
-   *
-   * @name isUndefined
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isUndefined = function (val, msg) {
-    new Assertion(val, msg).to.equal(undefined);
-  };
-
-  /**
-   * ### .isDefined(value, [message])
-   *
-   * Asserts that `value` is not `undefined`.
-   *
-   *     var tea = 'cup of chai';
-   *     assert.isDefined(tea, 'tea has been defined');
-   *
-   * @name isDefined
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isDefined = function (val, msg) {
-    new Assertion(val, msg).to.not.equal(undefined);
-  };
-
-  /**
-   * ### .isFunction(value, [message])
-   *
-   * Asserts that `value` is a function.
-   *
-   *     function serveTea() { return 'cup of tea'; };
-   *     assert.isFunction(serveTea, 'great, we can have tea now');
-   *
-   * @name isFunction
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isFunction = function (val, msg) {
-    new Assertion(val, msg).to.be.a('function');
-  };
-
-  /**
-   * ### .isNotFunction(value, [message])
-   *
-   * Asserts that `value` is _not_ a function.
-   *
-   *     var serveTea = [ 'heat', 'pour', 'sip' ];
-   *     assert.isNotFunction(serveTea, 'great, we have listed the steps');
-   *
-   * @name isNotFunction
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotFunction = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('function');
-  };
-
-  /**
-   * ### .isObject(value, [message])
-   *
-   * Asserts that `value` is an object (as revealed by
-   * `Object.prototype.toString`).
-   *
-   *     var selection = { name: 'Chai', serve: 'with spices' };
-   *     assert.isObject(selection, 'tea selection is an object');
-   *
-   * @name isObject
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isObject = function (val, msg) {
-    new Assertion(val, msg).to.be.a('object');
-  };
-
-  /**
-   * ### .isNotObject(value, [message])
-   *
-   * Asserts that `value` is _not_ an object.
-   *
-   *     var selection = 'chai'
-   *     assert.isNotObject(selection, 'tea selection is not an object');
-   *     assert.isNotObject(null, 'null is not an object');
-   *
-   * @name isNotObject
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotObject = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('object');
-  };
-
-  /**
-   * ### .isArray(value, [message])
-   *
-   * Asserts that `value` is an array.
-   *
-   *     var menu = [ 'green', 'chai', 'oolong' ];
-   *     assert.isArray(menu, 'what kind of tea do we want?');
-   *
-   * @name isArray
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isArray = function (val, msg) {
-    new Assertion(val, msg).to.be.an('array');
-  };
-
-  /**
-   * ### .isNotArray(value, [message])
-   *
-   * Asserts that `value` is _not_ an array.
-   *
-   *     var menu = 'green|chai|oolong';
-   *     assert.isNotArray(menu, 'what kind of tea do we want?');
-   *
-   * @name isNotArray
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotArray = function (val, msg) {
-    new Assertion(val, msg).to.not.be.an('array');
-  };
-
-  /**
-   * ### .isString(value, [message])
-   *
-   * Asserts that `value` is a string.
-   *
-   *     var teaOrder = 'chai';
-   *     assert.isString(teaOrder, 'order placed');
-   *
-   * @name isString
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isString = function (val, msg) {
-    new Assertion(val, msg).to.be.a('string');
-  };
-
-  /**
-   * ### .isNotString(value, [message])
-   *
-   * Asserts that `value` is _not_ a string.
-   *
-   *     var teaOrder = 4;
-   *     assert.isNotString(teaOrder, 'order placed');
-   *
-   * @name isNotString
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotString = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('string');
-  };
-
-  /**
-   * ### .isNumber(value, [message])
-   *
-   * Asserts that `value` is a number.
-   *
-   *     var cups = 2;
-   *     assert.isNumber(cups, 'how many cups');
-   *
-   * @name isNumber
-   * @param {Number} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNumber = function (val, msg) {
-    new Assertion(val, msg).to.be.a('number');
-  };
-
-  /**
-   * ### .isNotNumber(value, [message])
-   *
-   * Asserts that `value` is _not_ a number.
-   *
-   *     var cups = '2 cups please';
-   *     assert.isNotNumber(cups, 'how many cups');
-   *
-   * @name isNotNumber
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotNumber = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('number');
-  };
-
-  /**
-   * ### .isBoolean(value, [message])
-   *
-   * Asserts that `value` is a boolean.
-   *
-   *     var teaReady = true
-   *       , teaServed = false;
-   *
-   *     assert.isBoolean(teaReady, 'is the tea ready');
-   *     assert.isBoolean(teaServed, 'has tea been served');
-   *
-   * @name isBoolean
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isBoolean = function (val, msg) {
-    new Assertion(val, msg).to.be.a('boolean');
-  };
-
-  /**
-   * ### .isNotBoolean(value, [message])
-   *
-   * Asserts that `value` is _not_ a boolean.
-   *
-   *     var teaReady = 'yep'
-   *       , teaServed = 'nope';
-   *
-   *     assert.isNotBoolean(teaReady, 'is the tea ready');
-   *     assert.isNotBoolean(teaServed, 'has tea been served');
-   *
-   * @name isNotBoolean
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.isNotBoolean = function (val, msg) {
-    new Assertion(val, msg).to.not.be.a('boolean');
-  };
-
-  /**
-   * ### .typeOf(value, name, [message])
-   *
-   * Asserts that `value`'s type is `name`, as determined by
-   * `Object.prototype.toString`.
-   *
-   *     assert.typeOf({ tea: 'chai' }, 'object', 'we have an object');
-   *     assert.typeOf(['chai', 'jasmine'], 'array', 'we have an array');
-   *     assert.typeOf('tea', 'string', 'we have a string');
-   *     assert.typeOf(/tea/, 'regexp', 'we have a regular expression');
-   *     assert.typeOf(null, 'null', 'we have a null');
-   *     assert.typeOf(undefined, 'undefined', 'we have an undefined');
-   *
-   * @name typeOf
-   * @param {Mixed} value
-   * @param {String} name
-   * @param {String} message
-   * @api public
-   */
-
-  assert.typeOf = function (val, type, msg) {
-    new Assertion(val, msg).to.be.a(type);
-  };
-
-  /**
-   * ### .notTypeOf(value, name, [message])
-   *
-   * Asserts that `value`'s type is _not_ `name`, as determined by
-   * `Object.prototype.toString`.
-   *
-   *     assert.notTypeOf('tea', 'number', 'strings are not numbers');
-   *
-   * @name notTypeOf
-   * @param {Mixed} value
-   * @param {String} typeof name
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notTypeOf = function (val, type, msg) {
-    new Assertion(val, msg).to.not.be.a(type);
-  };
-
-  /**
-   * ### .instanceOf(object, constructor, [message])
-   *
-   * Asserts that `value` is an instance of `constructor`.
-   *
-   *     var Tea = function (name) { this.name = name; }
-   *       , chai = new Tea('chai');
-   *
-   *     assert.instanceOf(chai, Tea, 'chai is an instance of tea');
-   *
-   * @name instanceOf
-   * @param {Object} object
-   * @param {Constructor} constructor
-   * @param {String} message
-   * @api public
-   */
-
-  assert.instanceOf = function (val, type, msg) {
-    new Assertion(val, msg).to.be.instanceOf(type);
-  };
-
-  /**
-   * ### .notInstanceOf(object, constructor, [message])
-   *
-   * Asserts `value` is not an instance of `constructor`.
-   *
-   *     var Tea = function (name) { this.name = name; }
-   *       , chai = new String('chai');
-   *
-   *     assert.notInstanceOf(chai, Tea, 'chai is not an instance of tea');
-   *
-   * @name notInstanceOf
-   * @param {Object} object
-   * @param {Constructor} constructor
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notInstanceOf = function (val, type, msg) {
-    new Assertion(val, msg).to.not.be.instanceOf(type);
-  };
-
-  /**
-   * ### .include(haystack, needle, [message])
-   *
-   * Asserts that `haystack` includes `needle`. Works
-   * for strings and arrays.
-   *
-   *     assert.include('foobar', 'bar', 'foobar contains string "bar"');
-   *     assert.include([ 1, 2, 3 ], 3, 'array contains value');
-   *
-   * @name include
-   * @param {Array|String} haystack
-   * @param {Mixed} needle
-   * @param {String} message
-   * @api public
-   */
-
-  assert.include = function (exp, inc, msg) {
-    new Assertion(exp, msg, assert.include).include(inc);
-  };
-
-  /**
-   * ### .notInclude(haystack, needle, [message])
-   *
-   * Asserts that `haystack` does not include `needle`. Works
-   * for strings and arrays.
-   *i
-   *     assert.notInclude('foobar', 'baz', 'string not include substring');
-   *     assert.notInclude([ 1, 2, 3 ], 4, 'array not include contain value');
-   *
-   * @name notInclude
-   * @param {Array|String} haystack
-   * @param {Mixed} needle
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notInclude = function (exp, inc, msg) {
-    new Assertion(exp, msg, assert.notInclude).not.include(inc);
-  };
-
-  /**
-   * ### .match(value, regexp, [message])
-   *
-   * Asserts that `value` matches the regular expression `regexp`.
-   *
-   *     assert.match('foobar', /^foo/, 'regexp matches');
-   *
-   * @name match
-   * @param {Mixed} value
-   * @param {RegExp} regexp
-   * @param {String} message
-   * @api public
-   */
-
-  assert.match = function (exp, re, msg) {
-    new Assertion(exp, msg).to.match(re);
-  };
-
-  /**
-   * ### .notMatch(value, regexp, [message])
-   *
-   * Asserts that `value` does not match the regular expression `regexp`.
-   *
-   *     assert.notMatch('foobar', /^foo/, 'regexp does not match');
-   *
-   * @name notMatch
-   * @param {Mixed} value
-   * @param {RegExp} regexp
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notMatch = function (exp, re, msg) {
-    new Assertion(exp, msg).to.not.match(re);
-  };
-
-  /**
-   * ### .property(object, property, [message])
-   *
-   * Asserts that `object` has a property named by `property`.
-   *
-   *     assert.property({ tea: { green: 'matcha' }}, 'tea');
-   *
-   * @name property
-   * @param {Object} object
-   * @param {String} property
-   * @param {String} message
-   * @api public
-   */
-
-  assert.property = function (obj, prop, msg) {
-    new Assertion(obj, msg).to.have.property(prop);
-  };
-
-  /**
-   * ### .notProperty(object, property, [message])
-   *
-   * Asserts that `object` does _not_ have a property named by `property`.
-   *
-   *     assert.notProperty({ tea: { green: 'matcha' }}, 'coffee');
-   *
-   * @name notProperty
-   * @param {Object} object
-   * @param {String} property
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notProperty = function (obj, prop, msg) {
-    new Assertion(obj, msg).to.not.have.property(prop);
-  };
-
-  /**
-   * ### .deepProperty(object, property, [message])
-   *
-   * Asserts that `object` has a property named by `property`, which can be a
-   * string using dot- and bracket-notation for deep reference.
-   *
-   *     assert.deepProperty({ tea: { green: 'matcha' }}, 'tea.green');
-   *
-   * @name deepProperty
-   * @param {Object} object
-   * @param {String} property
-   * @param {String} message
-   * @api public
-   */
-
-  assert.deepProperty = function (obj, prop, msg) {
-    new Assertion(obj, msg).to.have.deep.property(prop);
-  };
-
-  /**
-   * ### .notDeepProperty(object, property, [message])
-   *
-   * Asserts that `object` does _not_ have a property named by `property`, which
-   * can be a string using dot- and bracket-notation for deep reference.
-   *
-   *     assert.notDeepProperty({ tea: { green: 'matcha' }}, 'tea.oolong');
-   *
-   * @name notDeepProperty
-   * @param {Object} object
-   * @param {String} property
-   * @param {String} message
-   * @api public
-   */
-
-  assert.notDeepProperty = function (obj, prop, msg) {
-    new Assertion(obj, msg).to.not.have.deep.property(prop);
-  };
-
-  /**
-   * ### .propertyVal(object, property, value, [message])
-   *
-   * Asserts that `object` has a property named by `property` with value given
-   * by `value`.
-   *
-   *     assert.propertyVal({ tea: 'is good' }, 'tea', 'is good');
-   *
-   * @name propertyVal
-   * @param {Object} object
-   * @param {String} property
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.propertyVal = function (obj, prop, val, msg) {
-    new Assertion(obj, msg).to.have.property(prop, val);
-  };
-
-  /**
-   * ### .propertyNotVal(object, property, value, [message])
-   *
-   * Asserts that `object` has a property named by `property`, but with a value
-   * different from that given by `value`.
-   *
-   *     assert.propertyNotVal({ tea: 'is good' }, 'tea', 'is bad');
-   *
-   * @name propertyNotVal
-   * @param {Object} object
-   * @param {String} property
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.propertyNotVal = function (obj, prop, val, msg) {
-    new Assertion(obj, msg).to.not.have.property(prop, val);
-  };
-
-  /**
-   * ### .deepPropertyVal(object, property, value, [message])
-   *
-   * Asserts that `object` has a property named by `property` with value given
-   * by `value`. `property` can use dot- and bracket-notation for deep
-   * reference.
-   *
-   *     assert.deepPropertyVal({ tea: { green: 'matcha' }}, 'tea.green', 'matcha');
-   *
-   * @name deepPropertyVal
-   * @param {Object} object
-   * @param {String} property
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.deepPropertyVal = function (obj, prop, val, msg) {
-    new Assertion(obj, msg).to.have.deep.property(prop, val);
-  };
-
-  /**
-   * ### .deepPropertyNotVal(object, property, value, [message])
-   *
-   * Asserts that `object` has a property named by `property`, but with a value
-   * different from that given by `value`. `property` can use dot- and
-   * bracket-notation for deep reference.
-   *
-   *     assert.deepPropertyNotVal({ tea: { green: 'matcha' }}, 'tea.green', 'konacha');
-   *
-   * @name deepPropertyNotVal
-   * @param {Object} object
-   * @param {String} property
-   * @param {Mixed} value
-   * @param {String} message
-   * @api public
-   */
-
-  assert.deepPropertyNotVal = function (obj, prop, val, msg) {
-    new Assertion(obj, msg).to.not.have.deep.property(prop, val);
-  };
-
-  /**
-   * ### .lengthOf(object, length, [message])
-   *
-   * Asserts that `object` has a `length` property with the expected value.
-   *
-   *     assert.lengthOf([1,2,3], 3, 'array has length of 3');
-   *     assert.lengthOf('foobar', 5, 'string has length of 6');
-   *
-   * @name lengthOf
-   * @param {Mixed} object
-   * @param {Number} length
-   * @param {String} message
-   * @api public
-   */
-
-  assert.lengthOf = function (exp, len, msg) {
-    new Assertion(exp, msg).to.have.length(len);
-  };
-
-  /**
-   * ### .throws(function, [constructor/string/regexp], [string/regexp], [message])
-   *
-   * Asserts that `function` will throw an error that is an instance of
-   * `constructor`, or alternately that it will throw an error with message
-   * matching `regexp`.
-   *
-   *     assert.throw(fn, 'function throws a reference error');
-   *     assert.throw(fn, /function throws a reference error/);
-   *     assert.throw(fn, ReferenceError);
-   *     assert.throw(fn, ReferenceError, 'function throws a reference error');
-   *     assert.throw(fn, ReferenceError, /function throws a reference error/);
-   *
-   * @name throws
-   * @alias throw
-   * @alias Throw
-   * @param {Function} function
-   * @param {ErrorConstructor} constructor
-   * @param {RegExp} regexp
-   * @param {String} message
-   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-   * @api public
-   */
-
-  assert.Throw = function (fn, errt, errs, msg) {
-    if ('string' === typeof errt || errt instanceof RegExp) {
-      errs = errt;
-      errt = null;
-    }
-
-    var assertErr = new Assertion(fn, msg).to.Throw(errt, errs);
-    return flag(assertErr, 'object');
-  };
-
-  /**
-   * ### .doesNotThrow(function, [constructor/regexp], [message])
-   *
-   * Asserts that `function` will _not_ throw an error that is an instance of
-   * `constructor`, or alternately that it will not throw an error with message
-   * matching `regexp`.
-   *
-   *     assert.doesNotThrow(fn, Error, 'function does not throw');
-   *
-   * @name doesNotThrow
-   * @param {Function} function
-   * @param {ErrorConstructor} constructor
-   * @param {RegExp} regexp
-   * @param {String} message
-   * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-   * @api public
-   */
-
-  assert.doesNotThrow = function (fn, type, msg) {
-    if ('string' === typeof type) {
-      msg = type;
-      type = null;
-    }
-
-    new Assertion(fn, msg).to.not.Throw(type);
-  };
-
-  /**
-   * ### .operator(val1, operator, val2, [message])
-   *
-   * Compares two values using `operator`.
-   *
-   *     assert.operator(1, '<', 2, 'everything is ok');
-   *     assert.operator(1, '>', 2, 'this will fail');
-   *
-   * @name operator
-   * @param {Mixed} val1
-   * @param {String} operator
-   * @param {Mixed} val2
-   * @param {String} message
-   * @api public
-   */
-
-  assert.operator = function (val, operator, val2, msg) {
-    if (!~['==', '===', '>', '>=', '<', '<=', '!=', '!=='].indexOf(operator)) {
-      throw new Error('Invalid operator "' + operator + '"');
-    }
-    var test = new Assertion(eval(val + operator + val2), msg);
-    test.assert(
-        true === flag(test, 'object')
-      , 'expected ' + util.inspect(val) + ' to be ' + operator + ' ' + util.inspect(val2)
-      , 'expected ' + util.inspect(val) + ' to not be ' + operator + ' ' + util.inspect(val2) );
-  };
-
-  /**
-   * ### .closeTo(actual, expected, delta, [message])
-   *
-   * Asserts that the target is equal `expected`, to within a +/- `delta` range.
-   *
-   *     assert.closeTo(1.5, 1, 0.5, 'numbers are close');
-   *
-   * @name closeTo
-   * @param {Number} actual
-   * @param {Number} expected
-   * @param {Number} delta
-   * @param {String} message
-   * @api public
-   */
-
-  assert.closeTo = function (act, exp, delta, msg) {
-    new Assertion(act, msg).to.be.closeTo(exp, delta);
-  };
-
-  /**
-   * ### .sameMembers(set1, set2, [message])
-   *
-   * Asserts that `set1` and `set2` have the same members.
-   * Order is not taken into account.
-   *
-   *     assert.sameMembers([ 1, 2, 3 ], [ 2, 1, 3 ], 'same members');
-   *
-   * @name sameMembers
-   * @param {Array} superset
-   * @param {Array} subset
-   * @param {String} message
-   * @api public
-   */
-
-  assert.sameMembers = function (set1, set2, msg) {
-    new Assertion(set1, msg).to.have.same.members(set2);
-  }
-
-  /**
-   * ### .includeMembers(superset, subset, [message])
-   *
-   * Asserts that `subset` is included in `superset`.
-   * Order is not taken into account.
-   *
-   *     assert.includeMembers([ 1, 2, 3 ], [ 2, 1 ], 'include members');
-   *
-   * @name includeMembers
-   * @param {Array} superset
-   * @param {Array} subset
-   * @param {String} message
-   * @api public
-   */
-
-  assert.includeMembers = function (superset, subset, msg) {
-    new Assertion(superset, msg).to.include.members(subset);
-  }
-
-  /*!
-   * Undocumented / untested
-   */
-
-  assert.ifError = function (val, msg) {
-    new Assertion(val, msg).to.not.be.ok;
-  };
-
-  /*!
-   * Aliases.
-   */
-
-  (function alias(name, as){
-    assert[as] = assert[name];
-    return alias;
-  })
-  ('Throw', 'throw')
-  ('Throw', 'throws');
-};
-
-});
-require.register("chai/lib/chai/interface/expect.js", function(exports, require, module){
-/*!
- * chai
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-module.exports = function (chai, util) {
-  chai.expect = function (val, message) {
-    return new chai.Assertion(val, message);
-  };
-};
-
-
-});
-require.register("chai/lib/chai/interface/should.js", function(exports, require, module){
-/*!
- * chai
- * Copyright(c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-module.exports = function (chai, util) {
-  var Assertion = chai.Assertion;
-
-  function loadShould () {
-    // explicitly define this method as function as to have it's name to include as `ssfi`
-    function shouldGetter() {
-      if (this instanceof String || this instanceof Number) {
-        return new Assertion(this.constructor(this), null, shouldGetter);
-      } else if (this instanceof Boolean) {
-        return new Assertion(this == true, null, shouldGetter);
-      }
-      return new Assertion(this, null, shouldGetter);
-    }
-    function shouldSetter(value) {
-      // See https://github.com/chaijs/chai/issues/86: this makes
-      // `whatever.should = someValue` actually set `someValue`, which is
-      // especially useful for `global.should = require('chai').should()`.
-      //
-      // Note that we have to use [[DefineProperty]] instead of [[Put]]
-      // since otherwise we would trigger this very setter!
-      Object.defineProperty(this, 'should', {
-        value: value,
-        enumerable: true,
-        configurable: true,
-        writable: true
-      });
-    }
-    // modify Object.prototype to have `should`
-    Object.defineProperty(Object.prototype, 'should', {
-      set: shouldSetter
-      , get: shouldGetter
-      , configurable: true
-    });
-
-    var should = {};
-
-    should.equal = function (val1, val2, msg) {
-      new Assertion(val1, msg).to.equal(val2);
-    };
-
-    should.Throw = function (fn, errt, errs, msg) {
-      new Assertion(fn, msg).to.Throw(errt, errs);
-    };
-
-    should.exist = function (val, msg) {
-      new Assertion(val, msg).to.exist;
-    }
-
-    // negation
-    should.not = {}
-
-    should.not.equal = function (val1, val2, msg) {
-      new Assertion(val1, msg).to.not.equal(val2);
-    };
-
-    should.not.Throw = function (fn, errt, errs, msg) {
-      new Assertion(fn, msg).to.not.Throw(errt, errs);
-    };
-
-    should.not.exist = function (val, msg) {
-      new Assertion(val, msg).to.not.exist;
-    }
-
-    should['throw'] = should['Throw'];
-    should.not['throw'] = should.not['Throw'];
-
-    return should;
-  };
-
-  chai.should = loadShould;
-  chai.Should = loadShould;
-};
-
-});
-require.register("chai/lib/chai/utils/addChainableMethod.js", function(exports, require, module){
-/*!
- * Chai - addChainingMethod utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependencies
- */
-
-var transferFlags = require('./transferFlags');
-var flag = require('./flag');
-var config = require('../config');
-
-/*!
- * Module variables
- */
-
-// Check whether `__proto__` is supported
-var hasProtoSupport = '__proto__' in Object;
-
-// Without `__proto__` support, this module will need to add properties to a function.
-// However, some Function.prototype methods cannot be overwritten,
-// and there seems no easy cross-platform way to detect them (@see chaijs/chai/issues/69).
-var excludeNames = /^(?:length|name|arguments|caller)$/;
-
-// Cache `Function` properties
-var call  = Function.prototype.call,
-    apply = Function.prototype.apply;
-
-/**
- * ### addChainableMethod (ctx, name, method, chainingBehavior)
- *
- * Adds a method to an object, such that the method can also be chained.
- *
- *     utils.addChainableMethod(chai.Assertion.prototype, 'foo', function (str) {
- *       var obj = utils.flag(this, 'object');
- *       new chai.Assertion(obj).to.be.equal(str);
- *     });
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.addChainableMethod('foo', fn, chainingBehavior);
- *
- * The result can then be used as both a method assertion, executing both `method` and
- * `chainingBehavior`, or as a language chain, which only executes `chainingBehavior`.
- *
- *     expect(fooStr).to.be.foo('bar');
- *     expect(fooStr).to.be.foo.equal('foo');
- *
- * @param {Object} ctx object to which the method is added
- * @param {String} name of method to add
- * @param {Function} method function to be used for `name`, when called
- * @param {Function} chainingBehavior function to be called every time the property is accessed
- * @name addChainableMethod
- * @api public
- */
-
-module.exports = function (ctx, name, method, chainingBehavior) {
-  if (typeof chainingBehavior !== 'function') {
-    chainingBehavior = function () { };
-  }
-
-  var chainableBehavior = {
-      method: method
-    , chainingBehavior: chainingBehavior
-  };
-
-  // save the methods so we can overwrite them later, if we need to.
-  if (!ctx.__methods) {
-    ctx.__methods = {};
-  }
-  ctx.__methods[name] = chainableBehavior;
-
-  Object.defineProperty(ctx, name,
-    { get: function () {
-        chainableBehavior.chainingBehavior.call(this);
-
-        var assert = function assert() {
-          var old_ssfi = flag(this, 'ssfi');
-          if (old_ssfi && config.includeStack === false)
-            flag(this, 'ssfi', assert);
-          var result = chainableBehavior.method.apply(this, arguments);
-          return result === undefined ? this : result;
-        };
-
-        // Use `__proto__` if available
-        if (hasProtoSupport) {
-          // Inherit all properties from the object by replacing the `Function` prototype
-          var prototype = assert.__proto__ = Object.create(this);
-          // Restore the `call` and `apply` methods from `Function`
-          prototype.call = call;
-          prototype.apply = apply;
-        }
-        // Otherwise, redefine all properties (slow!)
-        else {
-          var asserterNames = Object.getOwnPropertyNames(ctx);
-          asserterNames.forEach(function (asserterName) {
-            if (!excludeNames.test(asserterName)) {
-              var pd = Object.getOwnPropertyDescriptor(ctx, asserterName);
-              Object.defineProperty(assert, asserterName, pd);
-            }
-          });
-        }
-
-        transferFlags(this, assert);
-        return assert;
-      }
-    , configurable: true
-  });
-};
-
-});
-require.register("chai/lib/chai/utils/addMethod.js", function(exports, require, module){
-/*!
- * Chai - addMethod utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-var config = require('../config');
-
-/**
- * ### .addMethod (ctx, name, method)
- *
- * Adds a method to the prototype of an object.
- *
- *     utils.addMethod(chai.Assertion.prototype, 'foo', function (str) {
- *       var obj = utils.flag(this, 'object');
- *       new chai.Assertion(obj).to.be.equal(str);
- *     });
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.addMethod('foo', fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(fooStr).to.be.foo('bar');
- *
- * @param {Object} ctx object to which the method is added
- * @param {String} name of method to add
- * @param {Function} method function to be used for name
- * @name addMethod
- * @api public
- */
-var flag = require('./flag');
-
-module.exports = function (ctx, name, method) {
-  ctx[name] = function () {
-    var old_ssfi = flag(this, 'ssfi');
-    if (old_ssfi && config.includeStack === false)
-      flag(this, 'ssfi', ctx[name]);
-    var result = method.apply(this, arguments);
-    return result === undefined ? this : result;
-  };
-};
-
-});
-require.register("chai/lib/chai/utils/addProperty.js", function(exports, require, module){
-/*!
- * Chai - addProperty utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### addProperty (ctx, name, getter)
- *
- * Adds a property to the prototype of an object.
- *
- *     utils.addProperty(chai.Assertion.prototype, 'foo', function () {
- *       var obj = utils.flag(this, 'object');
- *       new chai.Assertion(obj).to.be.instanceof(Foo);
- *     });
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.addProperty('foo', fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(myFoo).to.be.foo;
- *
- * @param {Object} ctx object to which the property is added
- * @param {String} name of property to add
- * @param {Function} getter function to be used for name
- * @name addProperty
- * @api public
- */
-
-module.exports = function (ctx, name, getter) {
-  Object.defineProperty(ctx, name,
-    { get: function () {
-        var result = getter.call(this);
-        return result === undefined ? this : result;
-      }
-    , configurable: true
-  });
-};
-
-});
-require.register("chai/lib/chai/utils/flag.js", function(exports, require, module){
-/*!
- * Chai - flag utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### flag(object ,key, [value])
- *
- * Get or set a flag value on an object. If a
- * value is provided it will be set, else it will
- * return the currently set value or `undefined` if
- * the value is not set.
- *
- *     utils.flag(this, 'foo', 'bar'); // setter
- *     utils.flag(this, 'foo'); // getter, returns `bar`
- *
- * @param {Object} object (constructed Assertion
- * @param {String} key
- * @param {Mixed} value (optional)
- * @name flag
- * @api private
- */
-
-module.exports = function (obj, key, value) {
-  var flags = obj.__flags || (obj.__flags = Object.create(null));
-  if (arguments.length === 3) {
-    flags[key] = value;
-  } else {
-    return flags[key];
-  }
-};
-
-});
-require.register("chai/lib/chai/utils/getActual.js", function(exports, require, module){
-/*!
- * Chai - getActual utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * # getActual(object, [actual])
- *
- * Returns the `actual` value for an Assertion
- *
- * @param {Object} object (constructed Assertion)
- * @param {Arguments} chai.Assertion.prototype.assert arguments
- */
-
-module.exports = function (obj, args) {
-  return args.length > 4 ? args[4] : obj._obj;
-};
-
-});
-require.register("chai/lib/chai/utils/getEnumerableProperties.js", function(exports, require, module){
-/*!
- * Chai - getEnumerableProperties utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### .getEnumerableProperties(object)
- *
- * This allows the retrieval of enumerable property names of an object,
- * inherited or not.
- *
- * @param {Object} object
- * @returns {Array}
- * @name getEnumerableProperties
- * @api public
- */
-
-module.exports = function getEnumerableProperties(object) {
-  var result = [];
-  for (var name in object) {
-    result.push(name);
-  }
-  return result;
-};
-
-});
-require.register("chai/lib/chai/utils/getMessage.js", function(exports, require, module){
-/*!
- * Chai - message composition utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependancies
- */
-
-var flag = require('./flag')
-  , getActual = require('./getActual')
-  , inspect = require('./inspect')
-  , objDisplay = require('./objDisplay');
-
-/**
- * ### .getMessage(object, message, negateMessage)
- *
- * Construct the error message based on flags
- * and template tags. Template tags will return
- * a stringified inspection of the object referenced.
- *
- * Message template tags:
- * - `#{this}` current asserted object
- * - `#{act}` actual value
- * - `#{exp}` expected value
- *
- * @param {Object} object (constructed Assertion)
- * @param {Arguments} chai.Assertion.prototype.assert arguments
- * @name getMessage
- * @api public
- */
-
-module.exports = function (obj, args) {
-  var negate = flag(obj, 'negate')
-    , val = flag(obj, 'object')
-    , expected = args[3]
-    , actual = getActual(obj, args)
-    , msg = negate ? args[2] : args[1]
-    , flagMsg = flag(obj, 'message');
-
-  msg = msg || '';
-  msg = msg
-    .replace(/#{this}/g, objDisplay(val))
-    .replace(/#{act}/g, objDisplay(actual))
-    .replace(/#{exp}/g, objDisplay(expected));
-
-  return flagMsg ? flagMsg + ': ' + msg : msg;
-};
-
-});
-require.register("chai/lib/chai/utils/getName.js", function(exports, require, module){
-/*!
- * Chai - getName utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * # getName(func)
- *
- * Gets the name of a function, in a cross-browser way.
- *
- * @param {Function} a function (usually a constructor)
- */
-
-module.exports = function (func) {
-  if (func.name) return func.name;
-
-  var match = /^\s?function ([^(]*)\(/.exec(func);
-  return match && match[1] ? match[1] : "";
-};
-
-});
-require.register("chai/lib/chai/utils/getPathValue.js", function(exports, require, module){
-/*!
- * Chai - getPathValue utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * @see https://github.com/logicalparadox/filtr
- * MIT Licensed
- */
-
-/**
- * ### .getPathValue(path, object)
- *
- * This allows the retrieval of values in an
- * object given a string path.
- *
- *     var obj = {
- *         prop1: {
- *             arr: ['a', 'b', 'c']
- *           , str: 'Hello'
- *         }
- *       , prop2: {
- *             arr: [ { nested: 'Universe' } ]
- *           , str: 'Hello again!'
- *         }
- *     }
- *
- * The following would be the results.
- *
- *     getPathValue('prop1.str', obj); // Hello
- *     getPathValue('prop1.att[2]', obj); // b
- *     getPathValue('prop2.arr[0].nested', obj); // Universe
- *
- * @param {String} path
- * @param {Object} object
- * @returns {Object} value or `undefined`
- * @name getPathValue
- * @api public
- */
-
-var getPathValue = module.exports = function (path, obj) {
-  var parsed = parsePath(path);
-  return _getPathValue(parsed, obj);
-};
-
-/*!
- * ## parsePath(path)
- *
- * Helper function used to parse string object
- * paths. Use in conjunction with `_getPathValue`.
- *
- *      var parsed = parsePath('myobject.property.subprop');
- *
- * ### Paths:
- *
- * * Can be as near infinitely deep and nested
- * * Arrays are also valid using the formal `myobject.document[3].property`.
- *
- * @param {String} path
- * @returns {Object} parsed
- * @api private
- */
-
-function parsePath (path) {
-  var str = path.replace(/\[/g, '.[')
-    , parts = str.match(/(\\\.|[^.]+?)+/g);
-  return parts.map(function (value) {
-    var re = /\[(\d+)\]$/
-      , mArr = re.exec(value)
-    if (mArr) return { i: parseFloat(mArr[1]) };
-    else return { p: value };
-  });
-};
-
-/*!
- * ## _getPathValue(parsed, obj)
- *
- * Helper companion function for `.parsePath` that returns
- * the value located at the parsed address.
- *
- *      var value = getPathValue(parsed, obj);
- *
- * @param {Object} parsed definition from `parsePath`.
- * @param {Object} object to search against
- * @returns {Object|Undefined} value
- * @api private
- */
-
-function _getPathValue (parsed, obj) {
-  var tmp = obj
-    , res;
-  for (var i = 0, l = parsed.length; i < l; i++) {
-    var part = parsed[i];
-    if (tmp) {
-      if ('undefined' !== typeof part.p)
-        tmp = tmp[part.p];
-      else if ('undefined' !== typeof part.i)
-        tmp = tmp[part.i];
-      if (i == (l - 1)) res = tmp;
-    } else {
-      res = undefined;
-    }
-  }
-  return res;
-};
-
-});
-require.register("chai/lib/chai/utils/getProperties.js", function(exports, require, module){
-/*!
- * Chai - getProperties utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### .getProperties(object)
- *
- * This allows the retrieval of property names of an object, enumerable or not,
- * inherited or not.
- *
- * @param {Object} object
- * @returns {Array}
- * @name getProperties
- * @api public
- */
-
-module.exports = function getProperties(object) {
-  var result = Object.getOwnPropertyNames(subject);
-
-  function addProperty(property) {
-    if (result.indexOf(property) === -1) {
-      result.push(property);
-    }
-  }
-
-  var proto = Object.getPrototypeOf(subject);
-  while (proto !== null) {
-    Object.getOwnPropertyNames(proto).forEach(addProperty);
-    proto = Object.getPrototypeOf(proto);
-  }
-
-  return result;
-};
-
-});
-require.register("chai/lib/chai/utils/index.js", function(exports, require, module){
-/*!
- * chai
- * Copyright(c) 2011 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Main exports
- */
-
-var exports = module.exports = {};
-
-/*!
- * test utility
- */
-
-exports.test = require('./test');
-
-/*!
- * type utility
- */
-
-exports.type = require('./type');
-
-/*!
- * message utility
- */
-
-exports.getMessage = require('./getMessage');
-
-/*!
- * actual utility
- */
-
-exports.getActual = require('./getActual');
-
-/*!
- * Inspect util
- */
-
-exports.inspect = require('./inspect');
-
-/*!
- * Object Display util
- */
-
-exports.objDisplay = require('./objDisplay');
-
-/*!
- * Flag utility
- */
-
-exports.flag = require('./flag');
-
-/*!
- * Flag transferring utility
- */
-
-exports.transferFlags = require('./transferFlags');
-
-/*!
- * Deep equal utility
- */
-
-exports.eql = require('deep-eql');
-
-/*!
- * Deep path value
- */
-
-exports.getPathValue = require('./getPathValue');
-
-/*!
- * Function name
- */
-
-exports.getName = require('./getName');
-
-/*!
- * add Property
- */
-
-exports.addProperty = require('./addProperty');
-
-/*!
- * add Method
- */
-
-exports.addMethod = require('./addMethod');
-
-/*!
- * overwrite Property
- */
-
-exports.overwriteProperty = require('./overwriteProperty');
-
-/*!
- * overwrite Method
- */
-
-exports.overwriteMethod = require('./overwriteMethod');
-
-/*!
- * Add a chainable method
- */
-
-exports.addChainableMethod = require('./addChainableMethod');
-
-/*!
- * Overwrite chainable method
- */
-
-exports.overwriteChainableMethod = require('./overwriteChainableMethod');
-
-
-});
-require.register("chai/lib/chai/utils/inspect.js", function(exports, require, module){
-// This is (almost) directly from Node.js utils
-// https://github.com/joyent/node/blob/f8c335d0caf47f16d31413f89aa28eda3878e3aa/lib/util.js
-
-var getName = require('./getName');
-var getProperties = require('./getProperties');
-var getEnumerableProperties = require('./getEnumerableProperties');
-
-module.exports = inspect;
-
-/**
- * Echos the value of a value. Trys to print the value out
- * in the best way possible given the different types.
- *
- * @param {Object} obj The object to print out.
- * @param {Boolean} showHidden Flag that shows hidden (not enumerable)
- *    properties of objects.
- * @param {Number} depth Depth in which to descend in object. Default is 2.
- * @param {Boolean} colors Flag to turn on ANSI escape codes to color the
- *    output. Default is false (no coloring).
- */
-function inspect(obj, showHidden, depth, colors) {
-  var ctx = {
-    showHidden: showHidden,
-    seen: [],
-    stylize: function (str) { return str; }
-  };
-  return formatValue(ctx, obj, (typeof depth === 'undefined' ? 2 : depth));
-}
-
-// https://gist.github.com/1044128/
-var getOuterHTML = function(element) {
-  if ('outerHTML' in element) return element.outerHTML;
-  var ns = "http://www.w3.org/1999/xhtml";
-  var container = document.createElementNS(ns, '_');
-  var elemProto = (window.HTMLElement || window.Element).prototype;
-  var xmlSerializer = new XMLSerializer();
-  var html;
-  if (document.xmlVersion) {
-    return xmlSerializer.serializeToString(element);
-  } else {
-    container.appendChild(element.cloneNode(false));
-    html = container.innerHTML.replace('><', '>' + element.innerHTML + '<');
-    container.innerHTML = '';
-    return html;
-  }
-};
-
-// Returns true if object is a DOM element.
-var isDOMElement = function (object) {
-  if (typeof HTMLElement === 'object') {
-    return object instanceof HTMLElement;
-  } else {
-    return object &&
-      typeof object === 'object' &&
-      object.nodeType === 1 &&
-      typeof object.nodeName === 'string';
-  }
-};
-
-function formatValue(ctx, value, recurseTimes) {
-  // Provide a hook for user-specified inspect functions.
-  // Check that value is an object with an inspect function on it
-  if (value && typeof value.inspect === 'function' &&
-      // Filter out the util module, it's inspect function is special
-      value.inspect !== exports.inspect &&
-      // Also filter out any prototype objects using the circular check.
-      !(value.constructor && value.constructor.prototype === value)) {
-    var ret = value.inspect(recurseTimes);
-    if (typeof ret !== 'string') {
-      ret = formatValue(ctx, ret, recurseTimes);
-    }
-    return ret;
-  }
-
-  // Primitive types cannot have properties
-  var primitive = formatPrimitive(ctx, value);
-  if (primitive) {
-    return primitive;
-  }
-
-  // If it's DOM elem, get outer HTML.
-  if (isDOMElement(value)) {
-    return getOuterHTML(value);
-  }
-
-  // Look up the keys of the object.
-  var visibleKeys = getEnumerableProperties(value);
-  var keys = ctx.showHidden ? getProperties(value) : visibleKeys;
-
-  // Some type of object without properties can be shortcutted.
-  // In IE, errors have a single `stack` property, or if they are vanilla `Error`,
-  // a `stack` plus `description` property; ignore those for consistency.
-  if (keys.length === 0 || (isError(value) && (
-      (keys.length === 1 && keys[0] === 'stack') ||
-      (keys.length === 2 && keys[0] === 'description' && keys[1] === 'stack')
-     ))) {
-    if (typeof value === 'function') {
-      var name = getName(value);
-      var nameSuffix = name ? ': ' + name : '';
-      return ctx.stylize('[Function' + nameSuffix + ']', 'special');
-    }
-    if (isRegExp(value)) {
-      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-    }
-    if (isDate(value)) {
-      return ctx.stylize(Date.prototype.toUTCString.call(value), 'date');
-    }
-    if (isError(value)) {
-      return formatError(value);
-    }
-  }
-
-  var base = '', array = false, braces = ['{', '}'];
-
-  // Make Array say that they are Array
-  if (isArray(value)) {
-    array = true;
-    braces = ['[', ']'];
-  }
-
-  // Make functions say that they are functions
-  if (typeof value === 'function') {
-    var name = getName(value);
-    var nameSuffix = name ? ': ' + name : '';
-    base = ' [Function' + nameSuffix + ']';
-  }
-
-  // Make RegExps say that they are RegExps
-  if (isRegExp(value)) {
-    base = ' ' + RegExp.prototype.toString.call(value);
-  }
-
-  // Make dates with properties first say the date
-  if (isDate(value)) {
-    base = ' ' + Date.prototype.toUTCString.call(value);
-  }
-
-  // Make error with message first say the error
-  if (isError(value)) {
-    return formatError(value);
-  }
-
-  if (keys.length === 0 && (!array || value.length == 0)) {
-    return braces[0] + base + braces[1];
-  }
-
-  if (recurseTimes < 0) {
-    if (isRegExp(value)) {
-      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-    } else {
-      return ctx.stylize('[Object]', 'special');
-    }
-  }
-
-  ctx.seen.push(value);
-
-  var output;
-  if (array) {
-    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
-  } else {
-    output = keys.map(function(key) {
-      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
-    });
-  }
-
-  ctx.seen.pop();
-
-  return reduceToSingleString(output, base, braces);
-}
-
-
-function formatPrimitive(ctx, value) {
-  switch (typeof value) {
-    case 'undefined':
-      return ctx.stylize('undefined', 'undefined');
-
-    case 'string':
-      var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
-                                               .replace(/'/g, "\\'")
-                                               .replace(/\\"/g, '"') + '\'';
-      return ctx.stylize(simple, 'string');
-
-    case 'number':
-      return ctx.stylize('' + value, 'number');
-
-    case 'boolean':
-      return ctx.stylize('' + value, 'boolean');
-  }
-  // For some reason typeof null is "object", so special case here.
-  if (value === null) {
-    return ctx.stylize('null', 'null');
-  }
-}
-
-
-function formatError(value) {
-  return '[' + Error.prototype.toString.call(value) + ']';
-}
-
-
-function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
-  var output = [];
-  for (var i = 0, l = value.length; i < l; ++i) {
-    if (Object.prototype.hasOwnProperty.call(value, String(i))) {
-      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-          String(i), true));
-    } else {
-      output.push('');
-    }
-  }
-  keys.forEach(function(key) {
-    if (!key.match(/^\d+$/)) {
-      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-          key, true));
-    }
-  });
-  return output;
-}
-
-
-function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
-  var name, str;
-  if (value.__lookupGetter__) {
-    if (value.__lookupGetter__(key)) {
-      if (value.__lookupSetter__(key)) {
-        str = ctx.stylize('[Getter/Setter]', 'special');
-      } else {
-        str = ctx.stylize('[Getter]', 'special');
-      }
-    } else {
-      if (value.__lookupSetter__(key)) {
-        str = ctx.stylize('[Setter]', 'special');
-      }
-    }
-  }
-  if (visibleKeys.indexOf(key) < 0) {
-    name = '[' + key + ']';
-  }
-  if (!str) {
-    if (ctx.seen.indexOf(value[key]) < 0) {
-      if (recurseTimes === null) {
-        str = formatValue(ctx, value[key], null);
-      } else {
-        str = formatValue(ctx, value[key], recurseTimes - 1);
-      }
-      if (str.indexOf('\n') > -1) {
-        if (array) {
-          str = str.split('\n').map(function(line) {
-            return '  ' + line;
-          }).join('\n').substr(2);
-        } else {
-          str = '\n' + str.split('\n').map(function(line) {
-            return '   ' + line;
-          }).join('\n');
-        }
-      }
-    } else {
-      str = ctx.stylize('[Circular]', 'special');
-    }
-  }
-  if (typeof name === 'undefined') {
-    if (array && key.match(/^\d+$/)) {
-      return str;
-    }
-    name = JSON.stringify('' + key);
-    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
-      name = name.substr(1, name.length - 2);
-      name = ctx.stylize(name, 'name');
-    } else {
-      name = name.replace(/'/g, "\\'")
-                 .replace(/\\"/g, '"')
-                 .replace(/(^"|"$)/g, "'");
-      name = ctx.stylize(name, 'string');
-    }
-  }
-
-  return name + ': ' + str;
-}
-
-
-function reduceToSingleString(output, base, braces) {
-  var numLinesEst = 0;
-  var length = output.reduce(function(prev, cur) {
-    numLinesEst++;
-    if (cur.indexOf('\n') >= 0) numLinesEst++;
-    return prev + cur.length + 1;
-  }, 0);
-
-  if (length > 60) {
-    return braces[0] +
-           (base === '' ? '' : base + '\n ') +
-           ' ' +
-           output.join(',\n  ') +
-           ' ' +
-           braces[1];
-  }
-
-  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
-}
-
-function isArray(ar) {
-  return Array.isArray(ar) ||
-         (typeof ar === 'object' && objectToString(ar) === '[object Array]');
-}
-
-function isRegExp(re) {
-  return typeof re === 'object' && objectToString(re) === '[object RegExp]';
-}
-
-function isDate(d) {
-  return typeof d === 'object' && objectToString(d) === '[object Date]';
-}
-
-function isError(e) {
-  return typeof e === 'object' && objectToString(e) === '[object Error]';
-}
-
-function objectToString(o) {
-  return Object.prototype.toString.call(o);
-}
-
-});
-require.register("chai/lib/chai/utils/objDisplay.js", function(exports, require, module){
-/*!
- * Chai - flag utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependancies
- */
-
-var inspect = require('./inspect');
-var config = require('../config');
-
-/**
- * ### .objDisplay (object)
- *
- * Determines if an object or an array matches
- * criteria to be inspected in-line for error
- * messages or should be truncated.
- *
- * @param {Mixed} javascript object to inspect
- * @name objDisplay
- * @api public
- */
-
-module.exports = function (obj) {
-  var str = inspect(obj)
-    , type = Object.prototype.toString.call(obj);
-
-  if (config.truncateThreshold && str.length >= config.truncateThreshold) {
-    if (type === '[object Function]') {
-      return !obj.name || obj.name === ''
-        ? '[Function]'
-        : '[Function: ' + obj.name + ']';
-    } else if (type === '[object Array]') {
-      return '[ Array(' + obj.length + ') ]';
-    } else if (type === '[object Object]') {
-      var keys = Object.keys(obj)
-        , kstr = keys.length > 2
-          ? keys.splice(0, 2).join(', ') + ', ...'
-          : keys.join(', ');
-      return '{ Object (' + kstr + ') }';
-    } else {
-      return str;
-    }
-  } else {
-    return str;
-  }
-};
-
-});
-require.register("chai/lib/chai/utils/overwriteMethod.js", function(exports, require, module){
-/*!
- * Chai - overwriteMethod utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### overwriteMethod (ctx, name, fn)
- *
- * Overwites an already existing method and provides
- * access to previous function. Must return function
- * to be used for name.
- *
- *     utils.overwriteMethod(chai.Assertion.prototype, 'equal', function (_super) {
- *       return function (str) {
- *         var obj = utils.flag(this, 'object');
- *         if (obj instanceof Foo) {
- *           new chai.Assertion(obj.value).to.equal(str);
- *         } else {
- *           _super.apply(this, arguments);
- *         }
- *       }
- *     });
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.overwriteMethod('foo', fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(myFoo).to.equal('bar');
- *
- * @param {Object} ctx object whose method is to be overwritten
- * @param {String} name of method to overwrite
- * @param {Function} method function that returns a function to be used for name
- * @name overwriteMethod
- * @api public
- */
-
-module.exports = function (ctx, name, method) {
-  var _method = ctx[name]
-    , _super = function () { return this; };
-
-  if (_method && 'function' === typeof _method)
-    _super = _method;
-
-  ctx[name] = function () {
-    var result = method(_super).apply(this, arguments);
-    return result === undefined ? this : result;
-  }
-};
-
-});
-require.register("chai/lib/chai/utils/overwriteProperty.js", function(exports, require, module){
-/*!
- * Chai - overwriteProperty utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### overwriteProperty (ctx, name, fn)
- *
- * Overwites an already existing property getter and provides
- * access to previous value. Must return function to use as getter.
- *
- *     utils.overwriteProperty(chai.Assertion.prototype, 'ok', function (_super) {
- *       return function () {
- *         var obj = utils.flag(this, 'object');
- *         if (obj instanceof Foo) {
- *           new chai.Assertion(obj.name).to.equal('bar');
- *         } else {
- *           _super.call(this);
- *         }
- *       }
- *     });
- *
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.overwriteProperty('foo', fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(myFoo).to.be.ok;
- *
- * @param {Object} ctx object whose property is to be overwritten
- * @param {String} name of property to overwrite
- * @param {Function} getter function that returns a getter function to be used for name
- * @name overwriteProperty
- * @api public
- */
-
-module.exports = function (ctx, name, getter) {
-  var _get = Object.getOwnPropertyDescriptor(ctx, name)
-    , _super = function () {};
-
-  if (_get && 'function' === typeof _get.get)
-    _super = _get.get
-
-  Object.defineProperty(ctx, name,
-    { get: function () {
-        var result = getter(_super).call(this);
-        return result === undefined ? this : result;
-      }
-    , configurable: true
-  });
-};
-
-});
-require.register("chai/lib/chai/utils/overwriteChainableMethod.js", function(exports, require, module){
-/*!
- * Chai - overwriteChainableMethod utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### overwriteChainableMethod (ctx, name, fn)
- *
- * Overwites an already existing chainable method
- * and provides access to the previous function or
- * property.  Must return functions to be used for
- * name.
- *
- *     utils.overwriteChainableMethod(chai.Assertion.prototype, 'length',
- *       function (_super) {
- *       }
- *     , function (_super) {
- *       }
- *     );
- *
- * Can also be accessed directly from `chai.Assertion`.
- *
- *     chai.Assertion.overwriteChainableMethod('foo', fn, fn);
- *
- * Then can be used as any other assertion.
- *
- *     expect(myFoo).to.have.length(3);
- *     expect(myFoo).to.have.length.above(3);
- *
- * @param {Object} ctx object whose method / property is to be overwritten
- * @param {String} name of method / property to overwrite
- * @param {Function} method function that returns a function to be used for name
- * @param {Function} chainingBehavior function that returns a function to be used for property
- * @name overwriteChainableMethod
- * @api public
- */
-
-module.exports = function (ctx, name, method, chainingBehavior) {
-  var chainableBehavior = ctx.__methods[name];
-
-  var _chainingBehavior = chainableBehavior.chainingBehavior;
-  chainableBehavior.chainingBehavior = function () {
-    var result = chainingBehavior(_chainingBehavior).call(this);
-    return result === undefined ? this : result;
-  };
-
-  var _method = chainableBehavior.method;
-  chainableBehavior.method = function () {
-    var result = method(_method).apply(this, arguments);
-    return result === undefined ? this : result;
-  };
-};
-
-});
-require.register("chai/lib/chai/utils/test.js", function(exports, require, module){
-/*!
- * Chai - test utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Module dependancies
- */
-
-var flag = require('./flag');
-
-/**
- * # test(object, expression)
- *
- * Test and object for expression.
- *
- * @param {Object} object (constructed Assertion)
- * @param {Arguments} chai.Assertion.prototype.assert arguments
- */
-
-module.exports = function (obj, args) {
-  var negate = flag(obj, 'negate')
-    , expr = args[0];
-  return negate ? !expr : expr;
-};
-
-});
-require.register("chai/lib/chai/utils/transferFlags.js", function(exports, require, module){
-/*!
- * Chai - transferFlags utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/**
- * ### transferFlags(assertion, object, includeAll = true)
- *
- * Transfer all the flags for `assertion` to `object`. If
- * `includeAll` is set to `false`, then the base Chai
- * assertion flags (namely `object`, `ssfi`, and `message`)
- * will not be transferred.
- *
- *
- *     var newAssertion = new Assertion();
- *     utils.transferFlags(assertion, newAssertion);
- *
- *     var anotherAsseriton = new Assertion(myObj);
- *     utils.transferFlags(assertion, anotherAssertion, false);
- *
- * @param {Assertion} assertion the assertion to transfer the flags from
- * @param {Object} object the object to transfer the flags too; usually a new assertion
- * @param {Boolean} includeAll
- * @name getAllFlags
- * @api private
- */
-
-module.exports = function (assertion, object, includeAll) {
-  var flags = assertion.__flags || (assertion.__flags = Object.create(null));
-
-  if (!object.__flags) {
-    object.__flags = Object.create(null);
-  }
-
-  includeAll = arguments.length === 3 ? includeAll : true;
-
-  for (var flag in flags) {
-    if (includeAll ||
-        (flag !== 'object' && flag !== 'ssfi' && flag != 'message')) {
-      object.__flags[flag] = flags[flag];
-    }
-  }
-};
-
-});
-require.register("chai/lib/chai/utils/type.js", function(exports, require, module){
-/*!
- * Chai - type utility
- * Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
- * MIT Licensed
- */
-
-/*!
- * Detectable javascript natives
- */
-
-var natives = {
-    '[object Arguments]': 'arguments'
-  , '[object Array]': 'array'
-  , '[object Date]': 'date'
-  , '[object Function]': 'function'
-  , '[object Number]': 'number'
-  , '[object RegExp]': 'regexp'
-  , '[object String]': 'string'
-};
-
-/**
- * ### type(object)
- *
- * Better implementation of `typeof` detection that can
- * be used cross-browser. Handles the inconsistencies of
- * Array, `null`, and `undefined` detection.
- *
- *     utils.type({}) // 'object'
- *     utils.type(null) // `null'
- *     utils.type(undefined) // `undefined`
- *     utils.type([]) // `array`
- *
- * @param {Mixed} object to detect type of
- * @name type
- * @api private
- */
-
-module.exports = function (obj) {
-  var str = Object.prototype.toString.call(obj);
-  if (natives[str]) return natives[str];
-  if (obj === null) return 'null';
-  if (obj === undefined) return 'undefined';
-  if (obj === Object(obj)) return 'object';
-  return typeof obj;
-};
-
-});
-
-require.alias("chaijs-assertion-error/index.js", "chai/deps/assertion-error/index.js");
-require.alias("chaijs-assertion-error/index.js", "chai/deps/assertion-error/index.js");
-require.alias("chaijs-assertion-error/index.js", "assertion-error/index.js");
-require.alias("chaijs-assertion-error/index.js", "chaijs-assertion-error/index.js");
-require.alias("chaijs-deep-eql/lib/eql.js", "chai/deps/deep-eql/lib/eql.js");
-require.alias("chaijs-deep-eql/lib/eql.js", "chai/deps/deep-eql/index.js");
-require.alias("chaijs-deep-eql/lib/eql.js", "deep-eql/index.js");
-require.alias("chaijs-type-detect/lib/type.js", "chaijs-deep-eql/deps/type-detect/lib/type.js");
-require.alias("chaijs-type-detect/lib/type.js", "chaijs-deep-eql/deps/type-detect/index.js");
-require.alias("chaijs-type-detect/lib/type.js", "chaijs-type-detect/index.js");
-require.alias("chaijs-deep-eql/lib/eql.js", "chaijs-deep-eql/index.js");
-require.alias("chai/index.js", "chai/index.js");
-
-window.assert = require("chai").assert;
-
-})();
-</script>