aa.setExtension("100");
    public void testOperator() {        AutoAttendant aa = new AutoAttendant();        aa.setExtension("100");        aa.setName(TEST_NAME);        aa.setDescription(TEST_DESCRIPTION);        Operator o = new MappingRule.Operator(aa, ArrayUtils.EMPTY_STRING_ARRAY);        assertEquals("100", StringUtils.join(o.getPatterns(), "|"));        assertEquals(TEST_NAME, o.getName());        assertEquals(TEST_DESCRIPTION, o.getDescription());    }