@Test(expected = IllegalArgumentException.class)
    public void testConcatNoEscaping() {
        StringUtils.concatCsv(new String[]{"a", "\"b", "c", "d"}, '|', null, '\"');
    }
Unit tests for csv splitting and concating.
inlong-sort/sort-formats/format-row/format-csv/src/test/java/org/apache/inlong/sort/formats/csv/CsvUtilsTest.java