def test_case_tens_7(self):
roman_numerals = RomanNumerals()
roman_number = roman_numerals.to_roman_factor('7', 1)
self.assertEqual(roman_number, 'LXX')
def test_case_unit_7(self):
roman_numerals = RomanNumerals()
roman_number = roman_numerals.to_roman_factor('7', 0)
self.assertEqual(roman_number, 'VII')