def test_to_roman_known_values(self):
'''to_roman should give known result with known input'''
for integer, numeral in self.known_values:
result = to_roman(integer)
self.assertEqual(numeral, result)
def test_to_roman_raises_not_integer_error_for_(self):
self.assertRaises(NotIntegerError, lambda: to_roman('#'))
def test_to_roman_returns_x_for_10(self):
self.assertEqual('x', to_roman(10))
def test_roundtrip(self):
"""from_roman(to_roman(n))==n for all n"""
for integer in range(1, 5000):
numeral = to_roman(integer)
result = from_roman(numeral)
self.assertEqual(integer, result)
