libs/mocha/should.js
function(n, desc){
        this.obj.should.have.property('length');
        var len = this.obj.length;
        this.assert(
            n == len
            , function(){ return 'expected ' + this.inspect + ' to have a length of ' + n + ' but got ' + len + (desc ? " | " + desc : "") }
            , function(){ return 'expected ' + this.inspect + ' to not have a length of ' + len + (desc ? " | " + desc : "") });
        return this;
    }
function(n, desc){
        this.obj.should.have.property('length');
        var len = this.obj.length;
        this.assert(
            n == len
            , function(){ return 'expected ' + this.inspect + ' to have a length of ' + n + ' but got ' + len + (desc ? " | " + desc : "") }
            , function(){ return 'expected ' + this.inspect + ' to not have a length of ' + len + (desc ? " | " + desc : "") });
        return this;
    }
function ( n , desc ) { this . obj . should . have . property ( 'length' ) ; var len = this . obj . length ; this . assert ( n == len , function ( ) { return 'expected ' + this . inspect + ' to have a length of ' + n + ' but got ' + len + ( desc ? " | " + desc : "" ) } , function ( ) { return 'expected ' + this . inspect + ' to not have a length of ' + len + ( desc ? " | " + desc : "" ) } ) ; return this ; }
Assert property "length" exists and has value of _n_.

@param {Number} n
@param {String} description
@api public
Assert property length exists and has value of _n_ .