text: 
  function Mock() {
  
  	var
  		that;
  
  	function mock() {
  		return that.return_value;
  	}
  
  	if (this && this.constructor === Mock) {
  		that = this;
  	} else {
  		that = mock;
  	}
  
  	that.assert_called_with = function() {
  	}
  }
  
  
  exports.Mok = Mock;
  
  exports.patch = patch;