underscore.inflections/test/vendor/chai.js

Port of ActiveSupport::Inflector::Inflections for underscore.js

!function (name, definition) {
  if (typeof define == 'function' && typeof define.amd  == 'object') define(definition);
  else this[name] = definition();
}('chai', function () {

// CommonJS require()

function require(p){
    var path = require.resolve(p)
      , mod = require.modules[path];
    if (!mod) throw new Error('failed to require "' + p + '"');
    if (!mod.exports) {
      mod.exports = {};
      mod.call(mod.exports, mod, mod.exports, require.relative(path));
    }
    return mod.exports;
  }

require.modules = {};

require.resolve = function (path){
    var orig = path
      , reg = path + '.js'
      , index = path + '/index.js';
    return require.modules[reg] && reg
      || require.modules[index] && index
      || orig;
  };

require.register = function (path, fn){
    require.modules[path] = fn;
  };

require.relative = function (parent) {
    return function(p){
      if ('.' != p[0]) return require(p);

      var path = parent.split('/')
        , segs = p.split('/');
      path.pop();

      for (var i = 0; i < segs.length; i++) {
        var seg = segs[i];
        if ('..' == seg) path.pop();
        else if ('.' != seg) path.push(seg);
      }

      return require(path.join('/'));
    };
  };


require.register("assertion.js", function(module, exports, require){
/*!
 * chai
 * http://chaijs.com
 * Copyright(c) 2011-2012 Jake Luer <jake@alogicalparadox.com>
 * MIT Licensed
 */


/*!
 * Module dependencies.
 */

var AssertionError = require('./browser/error')
  , toString = Object.prototype.toString
  , util = require('./utils')
  , flag = util.flag;

/*!
 * Module export.
 */

module.exports = 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);
}

/*!
  * ### Assertion.includeStack
  *
  * User configurable property, influences whether stack trace
  * is included in Assertion error message. Default of false
  * suppresses stack trace in the error message
  *
  *     Assertion.includeStack = true;  // enable stack on error
  *
  * @api public
  */

Assertion.includeStack = false;

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);
};

/*!
 * ### .assert(expression, message, negateMessage, expected, actual)
 *
 * Executes an expression and check expectations. Throws AssertionError for reporting if test doesn't pass.
 *
 * @name assert
 * @param {Philosophical} expression to be tested
 * @param {String} message to display if fails
 * @param {String} negatedMessage to display if negated expression fails
 * @param {Mixed} expected value (remember to check for negation)
 * @param {Mixed} actual (optional) will default to `this.obj`
 * @api private
 */

Assertion.prototype.assert = function (expr, msg, negateMsg, expected, _actual) {
  var msg = util.getMessage(this, arguments)
    , actual = util.getActual(this, arguments)
    , ok = util.test(this, arguments);

  if (!ok) {
    throw new AssertionError({
        message: msg
      , actual: actual
      , expected: expected
      , stackStartFunction: (Assertion.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);
    }
});

/**
 * ### Language Chains
 *
 * The following are provide as chainable getters to
 * improve the readability of your assertions. They
 * do not provide an testing capability unless they
 * have been overwritten by a plugin.
 *
 * **Chains**
 *
 * - to
 * - be
 * - been
 * - is
 * - and
 * - have
 * - with
 *
 * @name language chains
 * @api public
 */

[ 'to', 'be', 'been'
, 'is', 'and', 'have'
, 'with' ].forEach(function (chain) {
  Object.defineProperty(Assertion.prototype, chain,
    { get: function () {
        return this;
      }
    , configurable: true
  });
});

/**
 * ### .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
 */

Object.defineProperty(Assertion.prototype, 'not',
  { get: function () {
      flag(this, 'negate', true);
      return this;
    }
  , configurable: 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
 */

Object.defineProperty(Assertion.prototype, 'deep',
  { get: function () {
      flag(this, 'deep', true);
      return this;
    }
  , configurable: 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 (as revealed by `Object.prototype.toString`).
 *
 *     // 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
 * @api public
 */

function an(type) {
  var obj = flag(this, 'object')
    , klassStart = type.charAt(0).toUpperCase()
    , klass = klassStart + type.slice(1)
    , article = ~[ 'A', 'E', 'I', 'O', 'U' ].indexOf(klassStart) ? 'an ' : 'a ';

  this.assert(
      '[object ' + klass + ']' === toString.call(obj)
    , 'expected #{this} to be ' + article + type
    , 'expected #{this} not to be ' + article + type
    , '[object ' + klass + ']'
    , toString.call(obj)
  );
}

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
 * @api public
 */

function includeChainingBehavior () {
  flag(this, 'contains', true);
}

function include (val) {
  var obj = flag(this, 'object')
  this.assert(
      ~obj.indexOf(val)
    , 'expected #{this} to include ' + util.inspect(val)
    , 'expected #{this} to not include ' + util.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
 */

Object.defineProperty(Assertion.prototype, 'ok',
  { get: function () {
      this.assert(
          flag(this, 'object')
        , 'expected #{this} to be truthy'
        , 'expected #{this} to be falsy');

      return this;
    }
  , configurable: true
});

/**
 * ### .true
 *
 * Asserts that the target is `true`.
 *
 *     expect(true).to.be.true;
 *     expect(1).to.not.be.true;
 *
 * @name true
 * @api public
 */

Object.defineProperty(Assertion.prototype, 'true',
  { get: function () {
      this.assert(
          true === flag(this, 'object')
        , 'expected #{this} to be true'
        , 'expected #{this} to be false'
        , this.negate ? false : true
      );

      return this;
    }
  , configurable: true
});

/**
 * ### .false
 *
 * Asserts that the target is `false`.
 *
 *     expect(false).to.be.false;
 *     expect(0).to.not.be.false;
 *
 * @name false
 * @api public
 */

Object.defineProperty(Assertion.prototype, 'false',
  { get: function () {
      this.assert(
          false === flag(this, 'object')
        , 'expected #{this} to be false'
        , 'expected #{this} to be true'
        , this.negate ? true : false
      );

      return this;
    }
  , configurable: true
});

/**
 * ### .null
 *
 * Asserts that the target is `null`.
 *
 *     expect(null).to.be.null;
 *     expect(undefined).not.to.be.null;
 *
 * @name null
 * @api public
 */

Object.defineProperty(Assertion.prototype, 'null',
  { get: function () {
      this.assert(
          null === flag(this, 'object')
        , 'expected #{this} to be null'
        , 'expected #{this} not to be null'
        , this.negate ? false : true
      );

      return this;
    }
  , configurable: true
});

/**
 * ### .undefined
 *
 * Asserts that the target is `undefined`.
 *
 *      expect(undefined).to.be.undefined;
 *      expect(null).to.not.be.undefined;
 *
 * @name undefined
 * @api public
 */

Object.defineProperty(Assertion.prototype, 'undefined',
  { get: function () {
      this.assert(
          undefined === flag(this, 'object')
        , 'expected #{this} to be undefined'
        , 'expected #{this} not to be undefined'
        , this.negate ? false : true
      );

      return this;
    }
  , configurable: true
});

/**
 * ### .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
 */

Object.defineProperty(Assertion.prototype, 'exist',
  { get: function () {
      this.assert(
          null != flag(this, 'object')
        , 'expected #{this} to exist'
        , 'expected #{this} to not exist'
      );

      return this;
    }
  , configurable: true
});

/**
 * ### .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
 */

Object.defineProperty(Assertion.prototype, 'empty',
  { get: 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');

      return this;
    }
  , configurable: true
});

/**
 * ### .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
 * @param {Mixed} value
 * @api public
 */

Assertion.prototype.equal = function (val) {
  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);
  }

  return this;
};

/**
 * ### .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
 * @param {Mixed} value
 * @api public
 */

Assertion.prototype.eql = function (obj) {
  this.assert(
      util.eql(obj, flag(this, 'object'))
    , 'expected #{this} to deeply equal #{exp}'
    , 'expected #{this} to not deeply equal #{exp}'
    , obj );

  return this;
};

/**
 * ### .above(value)
 *
 * Asserts that the target is greater than `value`.
 *
 *     expect(10).to.be.above(5);
 *
 * @name above
 * @alias gt
 * @param {Number} value
 * @api public
 */

Assertion.prototype.above = function (val) {
  this.assert(
      flag(this, 'object') > val
    , 'expected #{this} to be above ' + val
    , 'expected #{this} to be below ' + val);

  return this;
};

/**
 * ### .below(value)
 *
 * Asserts that the target is less than `value`.
 *
 *     expect(5).to.be.below(10);
 *
 * @name below
 * @alias lt
 * @param {Number} value
 * @api public
 */

Assertion.prototype.below = function (val) {
  this.assert(
      flag(this, 'object') < val
    , 'expected #{this} to be below ' + val
    , 'expected #{this} to be above ' + val);

  return this;
};

/**
 * ### .within(start, finish)
 *
 * Asserts that the target is within a range.
 *
 *     expect(7).to.be.within(5,10);
 *
 * @name within
 * @param {Number} start lowerbound inclusive
 * @param {Number} finish upperbound inclusive
 * @api public
 */

Assertion.prototype.within = function (start, finish) {
  var obj = flag(this, 'object')
    , range = start + '..' + finish;

  this.assert(
      obj >= start && obj <= finish
    , 'expected #{this} to be within ' + range
    , 'expected #{this} to not be within ' + range);

  return this;
};

/**
 * ### .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
 * @alias instanceOf
 * @api public
 */

Assertion.prototype.instanceOf = function (constructor) {
  var name = util.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);

  return this;
};

/**
 * ### .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');
 *     expect(obj).to.have.property('foo').to.be.a('string');
 *
 *     // 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');
 *
 * @name property
 * @param {String} name
 * @param {Mixed} value (optional)
 * @returns value of property for chaining
 * @api public
 */

Assertion.prototype.property = function (name, val) {
  var obj = flag(this, 'object')
    , value = flag(this, 'deep') ? util.getPathValue(name, obj) : obj[name]
    , descriptor = flag(this, 'deep') ? 'deep property ' : 'property '
    , negate = flag(this, 'negate');

  if (negate && undefined !== val) {
    if (undefined === value) {
      throw new Error(util.inspect(obj) + ' has no ' + descriptor + util.inspect(name));
    }
  } else {
    this.assert(
        undefined !== value
      , 'expected #{this} to have a ' + descriptor + util.inspect(name)
      , 'expected #{this} to not have ' + descriptor + util.inspect(name));
  }

  if (undefined !== val) {
    this.assert(
        val === value
      , 'expected #{this} to have a ' + descriptor + util.inspect(name) + ' of #{exp}, but got #{act}'
      , 'expected #{this} to not have a ' + descriptor + util.inspect(name) + ' of #{act}'
      , val
      , value
    );
  }

  flag(this, 'object', value);
  return this;
};

/**
 * ### .ownProperty(name)
 *
 * Asserts that the target has an own property `name`.
 *
 *     expect('test').to.have.ownProperty('length');
 *
 * @name ownProperty
 * @alias haveOwnProperty
 * @param {String} name
 * @api public
 */

Assertion.prototype.ownProperty = function (name) {
  var obj = flag(this, 'object');
  this.assert(
      obj.hasOwnProperty(name)
    , 'expected #{this} to have own property ' + util.inspect(name)
    , 'expected #{this} to not have own property ' + util.inspect(name));
  return this;
};

/**
 * ### .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);
 *
 * @name length
 * @alias lengthOf
 * @param {Number} length
 * @api public
 */

Assertion.prototype.length = function (n) {
  var obj = flag(this, 'object');
  new Assertion(obj).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
  );

  return this;
};

/**
 * ### .match(regexp)
 *
 * Asserts that the target matches a regular expression.
 *
 *     expect('foobar').to.match(/^foo/);
 *
 * @name match
 * @param {RegExp} RegularExpression
 * @api public
 */

Assertion.prototype.match = function (re) {
  var obj = flag(this, 'object');
  this.assert(
      re.exec(obj)
    , 'expected #{this} to match ' + re
    , 'expected #{this} not to match ' + re);

  return this;
};


/**
 * ### .string(string)
 *
 * Asserts that the string target contains another string.
 *
 *     expect('foobar').to.have.string('bar');
 *
 * @name string
 * @param {String} string
 * @api public
 */

Assertion.prototype.string = function (str) {
  var obj = flag(this, 'object');
  new Assertion(obj).is.a('string');

  this.assert(
      ~obj.indexOf(str)
    , 'expected #{this} to contain ' + util.inspect(str)
    , 'expected #{this} to not contain ' + util.inspect(str));

  return this;
};

/**
 * ### .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
 */

Assertion.prototype.keys = function(keys) {
  var obj = flag(this, 'object')
    , str
    , ok = true;

  keys = keys instanceof Array
    ? keys
    : Array.prototype.slice.call(arguments);

  if (!keys.length) throw new Error('keys required');

  var actual = Object.keys(obj)
    , len = keys.length;

  // Inclusion
  ok = keys.every(function(key){
    return ~actual.indexOf(key);
  });

  // Strict
  if (!flag(this, 'negate') && !flag(this, 'contains')) {
    ok = ok && keys.length == actual.length;
  }

  // Key string
  if (len > 1) {
    keys = keys.map(function(key){
      return util.inspect(key);
    });
    var last = keys.pop();
    str = keys.join(', ') + ', and ' + last;
  } else {
    str = util.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
    , keys
    , Object.keys(obj)
  );

  return this;
}

/**
 * ### .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
 * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
 * @api public
 */

Assertion.prototype.Throw = function (constructor, msg) {
  var obj = flag(this, 'object');
  new Assertion(obj).is.a('function');

  var thrown = false
    , desiredError = null
    , name = null;

  if (arguments.length === 0) {
    msg = null;
    constructor = null;
  } else if (constructor && (constructor instanceof RegExp || 'string' === typeof constructor)) {
    msg = constructor;
    constructor = null;
  } else if (constructor && constructor instanceof Error) {
    desiredError = constructor;
    constructor = null;
    msg = null;
  } else if (typeof constructor === 'function') {
    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 ' + util.inspect(desiredError) + ' but ' + util.inspect(err) + ' was thrown'
        , 'expected #{this} to not throw ' + util.inspect(desiredError)
      );
      return this;
    }
    // next, check constructor
    if (constructor) {
      this.assert(
          err instanceof constructor
        , 'expected #{this} to throw ' + name + ' but a ' + err.name + ' was thrown'
        , 'expected #{this} to not throw ' + name );
      if (!msg) return this;
    }
    // next, check message
    if (err.message && msg && msg instanceof RegExp) {
      this.assert(
          msg.exec(err.message)
        , 'expected #{this} to throw error matching ' + msg + ' but got ' + util.inspect(err.message)
        , 'expected #{this} to throw error not matching ' + msg
      );
      return this;
    } else if (err.message && msg && 'string' === typeof msg) {
      this.assert(
          ~err.message.indexOf(msg)
        , 'expected #{this} to throw error including #{exp} but got #{act}'
        , 'expected #{this} to throw error not including #{act}'
        , msg
        , err.message
      );
      return this;
    } else {
      thrown = true;
    }
  }

  var expectedThrown = name ? name : desiredError ? util.inspect(desiredError) : 'an error';

  this.assert(
      thrown === true
    , 'expected #{this} to throw ' + expectedThrown
    , 'expected #{this} to not throw ' + expectedThrown);

  return this;
};

/**
 * ### .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
 * @api public
 */

Assertion.prototype.respondTo = function (method) {
  var obj = flag(this, 'object')
    , itself = flag(this, 'itself')
    , context = ('function' === typeof obj && !itself)
      ? obj.prototype[method]
      : obj[method];

  this.assert(
      'function' === typeof context
    , 'expected #{this} to respond to ' + util.inspect(method)
    , 'expected #{this} to not respond to ' + util.inspect(method)
    , 'function'
    , typeof context
  );

  return this;
};

/**
 * ### .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
 */
Object.defineProperty(Assertion.prototype, 'itself',
  { get: function () {
      flag(this, 'itself', true);
      return this;
    }
  , configurable: 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
 * @api public
 */

Assertion.prototype.satisfy = function (matcher) {
  var obj = flag(this, 'object');
  this.assert(
      matcher(obj)
    , 'expected #{this} to satisfy ' + util.inspect(matcher)
    , 'expected #{this} to not satisfy' + util.inspect(matcher)
    , this.negate ? false : true
    , matcher(obj)
  );

  return this;
};

/**
 * ### .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
 * @api public
 */

Assertion.prototype.closeTo = function (expected, delta) {
  var obj = flag(this, 'object');
  this.assert(
      (obj - delta === expected) || (obj + delta === expected)
    , 'expected #{this} to be close to ' + expected + ' +/- ' + delta
    , 'expected #{this} not to be close to ' + expected + ' +/- ' + delta);

  return this;
};

/*!
 * Aliases.
 */

(function alias(name, as){
  Assertion.prototype[as] = Assertion.prototype[name];
  return alias;
})
('equal', 'eq')
('above', 'gt')
('below', 'lt')
('length', 'lengthOf')
('keys', 'key')
('ownProperty', 'haveOwnProperty')
('above', 'greaterThan')
('below', 'lessThan')
('Throw', 'throws')
('Throw', 'throw')
('instanceOf', 'instanceof');

}); // module: assertion.js

require.register("browser/error.js", function(module, exports, require){
/*!
 * chai
 * Copyright(c) 2011-2012 Jake Luer <jake@alogicalparadox.com>
 * MIT Licensed
 */

module.exports = AssertionError;

function AssertionError (options) {
  options = options || {};
  this.message = options.message;
  this.actual = options.actual;
  this.expected = options.expected;
  this.operator = options.operator;

  if (options.stackStartFunction && Error.captureStackTrace) {
    var stackStartFunction = options.stackStartFunction;
    Error.captureStackTrace(this, stackStartFunction);
  }
}

AssertionError.prototype = Object.create(Error.prototype);
AssertionError.prototype.name = 'AssertionError';
AssertionError.prototype.constructor = AssertionError;

AssertionError.prototype.toString = function() {
  return this.message;
};

}); // module: browser/error.js

require.register("chai.js", function(module, exports, require){
/*!
 * chai
 * Copyright(c) 2011-2012 Jake Luer <jake@alogicalparadox.com>
 * MIT Licensed
 */

var used = []
  , exports = module.exports = {};

/*!
 * Chai version
 */

exports.version = '1.0.4';

/*!
 * Primary `Assertion` prototype
 */

exports.Assertion = require('./assertion');

/*!
 * Assertion Error
 */

exports.AssertionError = require('./browser/error');

/*!
 * Utils for plugins (not exported)
 */

var util = require('./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;
};

/*!
 * Expect interface
 */

var expect = require('./interface/expect');
exports.use(expect);

/*!
 * Should interface
 */

var should = require('./interface/should');
exports.use(should);

/*!
 * Assert interface
 */

var assert = require('./interface/assert');
exports.use(assert);

}); // module: chai.js

require.register("interface/assert.js", function(module, exports, require){
/*!
 * chai
 * Copyright(c) 2011-2012 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);
    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) {
    throw new chai.AssertionError({
        actual: actual
      , expected: expected
      , message: message
      , operator: operator
      , stackStartFunction: 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;
  };

  /**
   * ### .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);

    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);

    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 isUndefined
   * @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.isObject(selection, 'tea selection is not an object');
   *     assert.isObject(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) {
    var obj = new Assertion(exp, msg);

    if (Array.isArray(exp)) {
      obj.to.include(inc);
    } else if ('string' === typeof exp) {
      obj.to.contain.string(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 lengt