(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++) {
      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
      ssf = ssf || arguments.callee;
      if (ssf && Error.captureStackTrace) {
        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
     */

    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 = '1.9.2';

    /*!
     * 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 || arguments.callee);
        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 or Function} message or function that returns message to display if fails
       * @param {String or Function} negatedMessage or function that returns 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) {
          msg = util.getMessage(this, arguments);
          var 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,
        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 (let k in val) new Assertion(obj).property(k, val[k]);
            return;
          }
          var subset = {};
          for (let 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);

      /**
       * ### .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),
          expected = keys,
          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,
          expected.sort(),
          actual.sort(),
          true,
        );
      }

      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');
        var result = matcher(obj);
        this.assert(
          result,
          'expected #{this} to satisfy ' + _.objDisplay(matcher),
          'expected #{this} to not satisfy' + _.objDisplay(matcher),
          this.negate ? false : true,
          result,
        );
      });

      /**
       * ### .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');

        new Assertion(obj, msg).is.a('number');
        if (_.type(expected) !== 'number' || _.type(delta) !== 'number') {
          throw new Error('the arguments to closeTo must be numbers');
        }

        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} set1
       * @param {Array} set2
       * @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) {
      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) {
      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') /* eslint-disable-line no-unused-vars */,
      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');

      if (typeof msg === 'function') msg = msg();
      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/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(subject) {
      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
     */

    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) {
      var ctx = {
        showHidden: showHidden,
        seen: [],
        stylize: function (str) {
          return str;
        },
      };
      return formatValue(ctx, obj, typeof depth === 'undefined' ? 2 : depth);
    }

    // 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 this is a DOM element, try to get the outer HTML.
      if (isDOMElement(value)) {
        if ('outerHTML' in value) {
          return value.outerHTML;
          // This value does not have an outerHTML attribute,
          //   it could still be an XML element
        } else {
          // Attempt to serialize it
          try {
            if (document.xmlVersion) {
              var xmlSerializer = new XMLSerializer();
              return xmlSerializer.serializeToString(value);
            } else {
              // Firefox 11- do not support outerHTML
              //   It does, however, support innerHTML
              //   Use the following to render the element
              var ns = 'http://www.w3.org/1999/xhtml';
              var container = document.createElementNS(ns, '_');

              container.appendChild(value.cloneNode(false));
              var html = container.innerHTML.replace('><', '>' + value.innerHTML + '<');
              container.innerHTML = '';
              return html;
            }
          } catch (err) {
            // This could be a non-native DOM implementation,
            //   continue with the normal flow:
            //   printing the element as if it is an object.
          }
        }
      }

      // 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') {
        name = getName(value);
        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 length = output.reduce(function (prev, cur) {
        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');
  if (typeof exports == 'object') {
    module.exports = require('chai');
  } else if (typeof define == 'function' && define.amd) {
    define([], function () {
      return require('chai');
    });
  } else {
    this['chai'] = require('chai');
  }
})();
