message: NO-TICK: Improve `sync_test`.
  Verify that after syncing, new node is keeping up with the protocol state.
diff: @@ -120,6 +120,18 @@ function do_await_full_synchronization() {
  WAIT_TIME_SEC=$((WAIT_TIME_SEC + 1))
  sleep 1.0
  done
  + # Wait one more era and then test LFB again.
  + # This way we can verify that the node is up-to-date with the protocol state
  + # after transitioning to an active validator.
  + await_n_eras 1
  + while [ "$(do_read_lfb_hash "$NODE_ID")" != "$(do_read_lfb_hash 1)" ]; do
  + if [ "$WAIT_TIME_SEC" = "$SYNC_TIMEOUT_SEC" ]; then
  + log "ERROR: Failed to keep up with the protocol state"
  + exit 1
  + fi
  + WAIT_TIME_SEC=$((WAIT_TIME_SEC + 1))
  + sleep 1.0
  + done
  }
  function dispatch_native() {
  