def test_retorna_X(): assert romanos(10) == 'X'
def test_retorna_XI(): assert romanos(11) == 'XI'
def test_retorna_VIII(): assert romanos(8) == 'VIII'
def test_retorna_IX(): assert romanos(9) == 'IX'
def test_retorna_VI(): assert romanos(6) == 'VI'
def test_retorna_V(): assert romanos(5) == 'V'
def test_retorna_IV(): assert romanos(4) == 'IV'
def test_retorna_III(): assert romanos(3) == 'III'
def test_retorna_I(): assert romanos(1) == 'I'