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'''Unit test for roman1.py
This program is part of 'Dive Into Python 3', a free Python book for
experienced programmers. Visit http://diveintopython3.org/ for the
latest version.
'''
import roman10
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'),
(4000, 'MMMM'),
(4500, 'MMMMD'),
(4888, 'MMMMDCCCLXXXVIII'),
(4999, 'MMMMCMXCIX'))
def test_to_roman_known_values(self):
'''to_roman should give known result with known input'''
for integer, numeral in self.known_values:
result = roman10.to_roman(integer)
self.assertEqual(numeral, result)
def test_from_roman_known_values(self):
'''from_roman should give known result with known input'''
for integer, numeral in self.known_values:
result = roman10.from_roman(numeral)
self.assertEqual(integer, result)
class ToRomanBadInput(unittest.TestCase):
def test_too_large(self):
'''to_roman should fail with large input'''
self.assertRaises(roman10.OutOfRangeError, roman10.to_roman, 5000)
def test_zero(self):
'''to_roman should fail with 0 input'''
self.assertRaises(roman10.OutOfRangeError, roman10.to_roman, 0)
def test_negative(self):
'''to_roman should fail with negative input'''
self.assertRaises(roman10.OutOfRangeError, roman10.to_roman, -1)
def test_non_integer(self):
'''to_roman should fail with non-integer input'''
self.assertRaises(roman10.NotIntegerError, roman10.to_roman, 0.5)
class FromRomanBadInput(unittest.TestCase):
def test_too_many_repeated_numerals(self):
'''from_roman should fail with too many repeated numerals'''
for s in ('MMMMM', 'DD', 'CCCC', 'LL', 'XXXX', 'VV', 'IIII'):
self.assertRaises(roman10.InvalidRomanNumeralError, roman10.from_roman, s)
def test_repeated_pairs(self):
'''from_roman should fail with repeated pairs of numerals'''
for s in ('CMCM', 'CDCD', 'XCXC', 'XLXL', 'IXIX', 'IVIV'):
self.assertRaises(roman10.InvalidRomanNumeralError, roman10.from_roman, s)
def test_malformed_antecedents(self):
'''from_roman should fail with malformed antecedents'''
for s in ('IIMXCC', 'VX', 'DCM', 'CMM', 'IXIV',
'MCMC', 'XCX', 'IVI', 'LM', 'LD', 'LC'):
self.assertRaises(roman10.InvalidRomanNumeralError, roman10.from_roman, s)
def test_blank(self):
'''from_roman should fail with blank string'''
self.assertRaises(roman10.InvalidRomanNumeralError, roman10.from_roman, '')
def test_non_string(self):
'''from_roman should fail with non-string input'''
self.assertRaises(roman10.InvalidRomanNumeralError, roman10.from_roman, 1)
class RoundtripCheck(unittest.TestCase):
def test_roundtrip(self):
'''from_roman(to_roman(n))==n for all n'''
for integer in range(1, 5000):
numeral = roman10.to_roman(integer)
result = roman10.from_roman(numeral)
self.assertEqual(integer, result)
if __name__ == '__main__':
unittest.main()
# Copyright (c) 2009, Mark Pilgrim, All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
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