Calendar calendar = Calendar.getInstance();
calendar.set(CalendarBean.CURRENT_YEAR, CalendarBean.CURRENT_MONTH, CalendarBean.CURRENT_DAY);
String month = calendar.getDisplayName(Calendar.MONTH, Calendar.LONG, Locale.US);
assertTrue(calendarHeaderElement.asText().indexOf(month) > -1);
page = div.click();
// After click
calendar.add(Calendar.MONTH, 1);
month = calendar.getDisplayName(Calendar.MONTH, Calendar.LONG, Locale.US);
assertTrue(calendarHeaderElement.asText().indexOf(month) > -1);