NotAvailableFeatureException extends RequestException { public NotAvailableFeatureException() { } NotAvailableFeatureException();  NotAvailableFeatureException(String message);  NotAvailableFeatureException(Throwable e);  NotAvailableFeatureException(String message, Throwable e);   }
@Test public void testNotAvailableFeatureException() { NotAvailableFeatureException exception = new NotAvailableFeatureException(); assertNull(exception.getMessage()); assertNull(exception.getCause()); }