code: function wrapFn(mocker, fn) {
    return function() {
      //Copy the arguments this function was called with
      var args = Array.prototype.slice.call(arguments);
      
      //Save the arguments to the log
      mocker.history.push(args);
      
      return fn.apply(this, arguments);
    };
  }
docs: Wraps the given function so that the history log is saved when it is called, and then the given function
  is run
  
  @param {Mocker} mocker     The mocker object
  @param {Function} fn       The function to run
  @return {Function}         The wrapped function
  @api public