assertFalse(helper2.isEoled());
    }

    public void test_updateConfiguration() {
        assertNotNull(systemHelper.updateConfiguration());
        systemHelper.addUpdateConfigListener("XXX", () -> "OK");
        assertTrue(systemHelper.updateConfiguration().contains("XXX: OK"));
    }

    public void test_isChangedClusterState() {
        systemHelper.isChangedClusterState(0);

    }

    /**
     * Adds a listener for configuration updates.
     *
     * @param name     The name of the listener.
     * @param listener The listener to add.
     */
    public void addUpdateConfigListener(final String name, final Supplier<String> listener) {
        updateConfigListenerMap.put(name, listener);
    }

    /**
     * Checks if the cluster state has changed.
     *