def test_return_one(self): assert roman_numerals(1) == 'I'
def test_return_II_for_two(self): assert roman_numerals(2) == 'II'
def test_return_VIII_for_eight(self): assert roman_numerals(8) == 'VIII'
def test_return_IX_for_nine(self): assert roman_numerals(9) == 'IX'
def test_return_VII_for_seven(self): assert roman_numerals(7) == 'VII'
def test_return_VI_for_six(self): assert roman_numerals(6) == 'VI'
def test_return_IV_for_four(self): assert roman_numerals(4) == 'IV'
def test_return_V_for_five(self): assert roman_numerals(5) == 'V'
def test_return_III_for_three(self): assert roman_numerals(3) == 'III'