assertEquals("", result);

        result = (String) method.invoke(keyMatchHelper, "Test123");
        assertEquals("test123", result);
    }

    @Test
    public void test_buildQuery_caseSensitivity() {
        List<String> keywordList = Arrays.asList("Java", "JAVA", "java");
        List<FilterFunctionBuilder> functionBuilders = new ArrayList<>();

        try {