// options is merged into the mocked `KeyboardEvent` data.
// Useful for simulating modifier keys, eg:
// triggerDelete(editor, DIRECTION.BACKWARD, {altKey: true})
function triggerDelete(editor, direction=DIRECTION.BACKWARD, options={}) {
assertEditor(editor);
const keyCode = direction === DIRECTION.BACKWARD ? KEY_CODES.BACKSPACE :
KEY_CODES.DELETE;
let eventOptions = merge({keyCode}, options);
let event = createMockEvent('keydown', editor.element, eventOptions);
_triggerEditorEvent(editor, event);
}
function createMockEvent(eventName, element, options={}) {
let event = {
type: eventName,
preventDefault() {},
target: element
};
merge(event, options);
return event;
}