Why Promise.then not firing?

I bound the below method to a click event

 getValue() {
    this.ready = Promise.resolve('test');
  }

and on ngOnInit I am expecting the Promise.then to fire as,

ngOnInit() {
    this.ready.then((res) => alert(res));
  }

Whenever I click the button, I call the getValue method, and expect the Promise.then to fire

Why is it not working?

Link to my code

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