Unable to programmatically test "Enter" key behavior.

[freshp86]

I am trying to write a simple test where I simulate an "Enter" keystroke on a menu item and then I assert that the current selection of the menu has changed. Even though a real "Enter" keystroke works, the programmatic one does not do anything, see minimal repro case at https://jsfiddle.net/j4rfjasf/9/.

I tried several variations (for example opening the menu before firing the event, as well as firing different types of events, keyup, keydown, keypress), without success. Any help is appreciated.