def test_decades(self):
self.assertEqual('XLV', to_roman(45))
def test_non_valid_input(self):
with self.assertRaises(NonValidInput):
to_roman(0)
with self.assertRaises(NonValidInput):
to_roman(5001)
def test_simple_number(self):
self.assertEqual('III', to_roman(3))
def test_edge_cases(self):
self.assertEqual('I', to_roman(1))
self.assertEqual('\u2181', to_roman(5000))
def test_ending_zero(self):
self.assertEqual('CC', to_roman(200))
def test_middle_zero(self):
self.assertEqual('CDIV', to_roman(404))
def test_thousands(self):
self.assertEqual('MMMDXXI', to_roman(3521))
def test_hundreds(self):
self.assertEqual('DCXXXIV', to_roman(634))