"""Unit test for roman.pyThis program is part of "Dive Into Python", a free Python book forexperienced programmers.  Visit http://diveintopython.org/ for thelatest version."""__author__ = "Mark Pilgrim (mark@diveintopython.org)"__version__ = "$Revision: 1.2 $"__date__ = "$Date: 2004/05/05 21:57:19 $"__copyright__ = "Copyright (c) 2001 Mark Pilgrim"__license__ = "Python"import romanimport unittestclass KnownValues(unittest.TestCase):	knownValues = ( (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 testToRomanKnownValues(self):		"""toRoman should give known result with known input"""		for integer, numeral in self.knownValues:			result = roman.toRoman(integer)			self.assertEqual(numeral, result)	def testFromRomanKnownValues(self):		"""fromRoman should give known result with known input"""		for integer, numeral in self.knownValues:			result = roman.fromRoman(numeral)			self.assertEqual(integer, result)class ToRomanBadInput(unittest.TestCase):	def testTooLarge(self):		"""toRoman should fail with large input"""		self.assertRaises(roman.OutOfRangeError, roman.toRoman, 5000)	def testZero(self):		"""toRoman should fail with 0 input"""		self.assertRaises(roman.OutOfRangeError, roman.toRoman, 0)	def testNegative(self):		"""toRoman should fail with negative input"""		self.assertRaises(roman.OutOfRangeError, roman.toRoman, -1)	def testDecimal(self):		"""toRoman should fail with non-integer input"""		self.assertRaises(roman.NotIntegerError, roman.toRoman, 0.5)class FromRomanBadInput(unittest.TestCase):	def testTooManyRepeatedNumerals(self):		"""fromRoman should fail with too many repeated numerals"""		for s in ('MMMMM', 'DD', 'CCCC', 'LL', 'XXXX', 'VV', 'IIII'):			self.assertRaises(roman.InvalidRomanNumeralError, roman.fromRoman, s)	def testRepeatedPairs(self):		"""fromRoman should fail with repeated pairs of numerals"""		for s in ('CMCM', 'CDCD', 'XCXC', 'XLXL', 'IXIX', 'IVIV'):			self.assertRaises(roman.InvalidRomanNumeralError, roman.fromRoman, s)	def testMalformedAntecedent(self):		"""fromRoman should fail with malformed antecedents"""		for s in ('IIMXCC', 'VX', 'DCM', 'CMM', 'IXIV',				  'MCMC', 'XCX', 'IVI', 'LM', 'LD', 'LC'):			self.assertRaises(roman.InvalidRomanNumeralError, roman.fromRoman, s)	def testBlank(self):		"""fromRoman should fail with blank string"""		self.assertRaises(roman.InvalidRomanNumeralError, roman.fromRoman, "")class SanityCheck(unittest.TestCase):	def testSanity(self):		"""fromRoman(toRoman(n))==n for all n"""		for integer in range(1, 5000):			numeral = roman.toRoman(integer)			result = roman.fromRoman(numeral)			self.assertEqual(integer, result)class CaseCheck(unittest.TestCase):	def testToRomanCase(self):		"""toRoman should always return uppercase"""		for integer in range(1, 5000):			numeral = roman.toRoman(integer)			self.assertEqual(numeral, numeral.upper())	def testFromRomanCase(self):		"""fromRoman should only accept uppercase input"""		for integer in range(1, 5000):			numeral = roman.toRoman(integer)			roman.fromRoman(numeral.upper())			self.assertRaises(roman.InvalidRomanNumeralError,							  roman.fromRoman, numeral.lower())if __name__ == "__main__":	unittest.main()