@Test
    public void testRomanUpper() {
        assertEquals("I", AutoPageNumberUtils.asRomanNumerals(1));
        assertEquals("XXVI", AutoPageNumberUtils.asRomanNumerals(26));
        assertEquals("XXVII", AutoPageNumberUtils.asRomanNumerals(27));
    }
Check upper-case Roman numerals numbers are generated based on the
input page number.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-apple-module/src/test/java/org/apache/tika/parser/iwork/AutoPageNumberUtilsTest.java