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@vralex
Created August 15, 2013 16:16
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Dive into python 3 example. Unit testing.
__author__ = 'VladimirDel'
import roman
import unittest
class KnownValues(unittest.TestCase):
known_values = ( (1, 'I'),
(2, 'II'),
(3, 'III'),
(4, 'IV'),
(5, 'V'),
(6, 'VI'),
(7, 'VII'),
(8, 'VIII'),
(9, 'IX'),
(10, 'X'),
(50, 'L'),
(100, 'C'),
(500, 'D'),
(1000, 'M'),
(31, 'XXXI'),
(148, 'CXLVIII'),
(294, 'CCXCIV'),
(312, 'CCCXII'),
(421, 'CDXXI'),
(528, 'DXXVIII'),
(621, 'DCXXI'),
(782, 'DCCLXXXII'),
(870, 'DCCCLXX'),
(941, 'CMXLI'),
(1043, 'MXLIII'),
(1110, 'MCX'),
(1226, 'MCCXXVI'),
(1301, 'MCCCI'),
(1485, 'MCDLXXXV'),
(1509, 'MDIX'),
(1607, 'MDCVII'),
(1754, 'MDCCLIV'),
(1832, 'MDCCCXXXII'),
(1993, 'MCMXCIII'),
(2074, 'MMLXXIV'),
(2152, 'MMCLII'),
(2212, 'MMCCXII'),
(2343, 'MMCCCXLIII'),
(2499, 'MMCDXCIX'),
(2574, 'MMDLXXIV'),
(2646, 'MMDCXLVI'),
(2723, 'MMDCCXXIII'),
(2892, 'MMDCCCXCII'),
(2975, 'MMCMLXXV'),
(3051, 'MMMLI'),
(3185, 'MMMCLXXXV'),
(3250, 'MMMCCL'),
(3313, 'MMMCCCXIII'),
(3408, 'MMMCDVIII'),
(3501, 'MMMDI'),
(3610, 'MMMDCX'),
(3743, 'MMMDCCXLIII'),
(3844, 'MMMDCCCXLIV'),
(3888, 'MMMDCCCLXXXVIII'),
(3940, 'MMMCMXL'),
(3999, 'MMMCMXCIX'))
def test_to_roman_known_values(self):
"""to_roman should give known result with known input"""
for integer, numeral in self.known_values:
result = roman.to_roman(integer)
self.assertEqual(numeral, result)
def test_from_roman_known_values(self):
"""from_roman should give known results with khone input"""
for integer, numeral in self.known_values:
n = roman.from_roman(numeral)
self.assertEqual(n, integer)
class RoundTripCheck(unittest.TestCase):
def test_round_trip(self):
"""from_roman and to_roman should be inverse"""
for integer in range(1, 4000):
numeral = roman.to_roman(integer)
n = roman.from_roman(numeral)
self.assertEqual(n, integer)
class ToRomanBadInput(unittest.TestCase):
def test_to_roman_out_of_range(self):
"""to_roman shoul raises exception on bad input"""
for value in (-1, 0, 4000, 5000, 6000):
self.assertRaises(roman.OutOfRangeError, roman.to_roman, value)
def test_not_integer(self):
values = [0.5, 1.5, "123", None]
for value in values:
self.assertRaises(roman.NotIntegerError, roman.to_roman, value)
class FromRomanBadInput(unittest.TestCase):
def test_too_many_repeated(self):
for s in ('MMMM', 'DD', 'CCCC', 'LL', 'XXXX', 'VV', 'IIII'):
self.assertRaises(roman.InvalidRomanNumeralError, roman.from_roman, s)
def test_repeated_pairs(self):
for s in ('CMCM', 'CDCD', 'XCXC', 'XLXL', 'IXIX', 'IVIV'):
self.assertRaises(roman.InvalidRomanNumeralError, roman.from_roman, s)
def test_wrong_numerals(self):
for s in ('IIMXCC', 'VX', 'DCM', 'CMM', 'IXIV',
'MCMC', 'XCX', 'IVI', 'LM', 'LD', 'LC'):
self.assertRaises(roman.InvalidRomanNumeralError, roman.from_roman, s)
if __name__ == '__main__':
unittest.main()
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