};
        ComponentUtil.register(mockConfig, "fessConfig");

        // Note: Full testing requires a running OpenSearch cluster
        assertTrue(true);
    }

    @Test
    public void test_getMessage_returnsCorrectValue() {
        // Test message getter exists
        FessConfig mockConfig = new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override