I'm trying to test this function:

@HostListener("keydown", [$event])
onKeyDown(event){
 if(event.keyCode===32 || event.keyCode===13){
    event.preventDefault();
    this.nameClicked.emit(this.name);
 }
}

However, I received this error in Karma: TypeError: event.preventDefault is not a function error.

This is the code for my unit test:

it("should emit name and call onKeyDown when pressed:, () => {

  const spy = spyOn(component.nameClicked, "emit");

  const event = {keyCode: 13};

  component.onKeyDown(event);

  expect(spy).toHaveBeenCalled();

 });
});