}

    @Test
    public void test_constructor() {
        // Test that constructor works properly
        assertNotNull(new LtrQueryRescorer());
    }

    @Test
    public void test_evaluate_withBlankModelName() {
        // Test when model name is blank
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            @Override
            public String getLtrModelName() {
                return "";