* Expected initialization: `foo{}bar`. * Press some keys - nothing should be added to editor's contents. * When press some key - event `keydown` should be logged. When the key is released - event `keyup` should be logged. * You can hold the key in order to check whether `keydown` event is fired multiple times. After releasing the key, `keyup` event should be fired once. * Check whether key events are logged to the console with proper data: * `keyCode`, * `altKey`, * `ctrlKey` (covers Ctrl and Cmd), * `shitKey`, * `domTarget` and `target`.