test: improve readline/emitKeypressEvents.js coverage
The previous test case did not cover the case where the stream add keypress
listener before emitKeypressEvents
and listens first and then removes the keypress
listener.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The previous test case did not cover the case where the stream add keypress
listener before emitKeypressEvents
and listens first and then removes the keypress
listener.