@Test
    void testSortSpecUca() {
        checkUcaUS("?query=test&sortspec=-uca(name,en_US)");
        checkUcaUS("?query=test&sortspec=-UCA(name,en_US)");
        checkSortSpecUcaUSOptional("?query=test&sortspec=-uca(name,en_US,tertiary)");
        checkSortSpecUcaUSOptional("?query=test&sortspec=-uca(name,en_US,TERTIARY)");
    }
Test that the integer convenience wrapper works as documented,
throwing NumberFormatException when applied to something that
is not a number.
container-search/src/test/java/com/yahoo/prelude/test/QueryTestCase.java