I’ve had some trouble simulating a keypress in a unit test also. But came across an answer by Seyed Jalal Hosseini. It might be what you’re after.
If you’re attempting to simulate a keypress you can trigger an event by calling dispatchEvent(new Event('keypress'));
on the element.
Here is the answer I’m referring to which gives more detail : https://stackoverflow.com/a/37956877/4081730
If you want to set the key that was pressed, this can be done also.
const event = new KeyboardEvent("keypress",{
"key": "Enter"
});
el.dispatchEvent(event);
Further information I’ve just come across: https://developer.mozilla.org/en-US/docs/Web/Guide/Events/Creating_and_triggering_events