JavaScript Fehler

[julia4]

var Test = function(x){

this.x = x;

};

Test.prototype.method1 = function() {

Object.keys(this).forEach(function(key){

console.log( key, this[key] );

});

};

test.method1();

var test = new Test('y');

Warum kommt hier kein x,y raus?

[Memento]

test.method1();

var test = new Test('y');

Dreh die beiden Zeilen mal um:

var test = new Test('y');

test.method1();