def test_equals_10(self): self.assertEqual(arabic_to_roman(599), 'DXCIX')
def test_equals_2(self): self.assertEqual(arabic_to_roman(0), 'NaR')
def test_equals_9(self): self.assertEqual(arabic_to_roman(6), 'VI')
def test_equals_8(self): self.assertEqual(arabic_to_roman(5), 'V')
def test_equals_7(self): self.assertEqual(arabic_to_roman(4), 'IV')
def test_equals_6(self): self.assertEqual(arabic_to_roman(3), 'III')
def test_equals_4(self): self.assertEqual(arabic_to_roman(1), 'I')