### Question:
AIS401ErrorMapper extends Psd2ErrorMapper<MessageError, Error401NGAIS> { @Override public HttpStatus getErrorStatus() { return HttpStatus.UNAUTHORIZED; }  @Override Function<MessageError, Error401NGAIS> getMapper(); @Override HttpStatus getErrorStatus();  }### Answer:
@Test void getErrorStatus_shouldReturn401() { HttpStatus errorStatus = ais401ErrorMapper.getErrorStatus(); assertEquals(HttpStatus.UNAUTHORIZED, errorStatus); }