Small follow-up fixes after 1.4 and added tests for using the project as a library as opposed to from the CLI

Author: fast-reflexes

BirthdayProblem.py

@@ -262,13 +262,13 @@ def solveForP(dOrDLog, nOrNLog, isBinary, isCombinations, method):
 		dOrDLog is the base-2 logarithm of the number of members, s, of a set from which we should generate the sample set d ((2^s)!).
 	'''
 	@staticmethod
-	def solveForN(dOrDLog, p, isBinary, isCombinations):
+	def solveForN(dOrDLog, p, isBinary, isCombinations, method):
 		_DecimalContext.reset() # reset to initial context precision
 		_BirthdayProblemInputHandler.sanitize(dOrDLog, None, p, isBinary, isCombinations, False, False, False, False)
 		d, dLog, _, _, p = _BirthdayProblemInputHandler.setup(dOrDLog, None, p, isBinary, isCombinations)
 		if(dLog is None):
 			raise SolverException(SolverErrorCode.DLOG_NOT_CALCULATED)
-		return _BirthdayProblemSolverChecked.birthdayProblemInv(d, dLog, p, isBinary)
+		return _BirthdayProblemSolverChecked.birthdayProblemInv(d, dLog, p, method, isBinary)
 
 
 class _BirthdayProblemSolverChecked:
@@ -550,7 +550,7 @@ def __birthdayProblemInvExact(d, p):
 		pInv = _DecimalContext.ctx.subtract(_DecimalFns.ONE, p)
 		n = _DecimalFns.ONE
 		currentPInv = _DecimalContext.ctx.divide(_DecimalContext.ctx.subtract(d, n), d)
-		while currentPInv > pInv:
+		while _DecimalFns.isGreaterThan(currentPInv, pInv):
 			n = _DecimalContext.ctx.add(n, _DecimalFns.ONE)
 			currentPInv = _DecimalContext.ctx.multiply(
 				currentPInv,
@@ -950,7 +950,7 @@ def parse(args = None):
 
 		parser.add_argument('d', metavar=('D'), type=str, nargs=1, help='Input number D, the total number of unique items, or a number from which the total number of unique items can be derived, in the set we are sampling from.')
 		parser.add_argument('-n', '--samples', metavar=('N'), type=str, help='Input number N, the number of samples, or a number from which the number of samples can be derived from, taken from the full set of D items. When present the probability P of at least one non-unique item among the samples will be calculated. Requires one of flags -e, -s, -t or -a to determine the desired precision(s) of the calculation.')
-		parser.add_argument('-p', '--probability', metavar=('P'), type=str, help='Input number P in [0.0, 1.0], the the probability of at least one non-unique item among the samples. When present the needed number of samples N will be calculated. Requires one of flags -e, -t or -a to determine the desired precision(s) of the calculation.')
+		parser.add_argument('-p', '--probability', metavar=('P'), type=str, help='Input number P in [0.0, 1.0], the probability of at least one non-unique item among the samples. When present the needed number of samples N will be calculated. Requires one of flags -e, -t or -a to determine the desired precision(s) of the calculation.')
 
 		parser.add_argument('-b', '--binary', dest='binary', action='store_const', const=True, default=False, help='Inputs D and N are seen as exponents with base 2')
 		parser.add_argument('-c', '--combinations', dest='combinations', action='store_const', const=True, default=False, help="Input D is seen as a number of unique items in a set from which we can yield N! (factorial) different members for the resulting set of unique items from which we sample. The calculation of D! uses Stirling's approximation which might introduce a small error responsible for the difference in results with the same input with and without -c flag.")
@@ -1094,12 +1094,13 @@ def solveText(d, dLog, n, nLog, p, pPercent, isBinary, isStirling, isTaylor, isE
 	def solveJson(d, dLog, n, nLog, p, pPercent, isBinary, isStirling, isTaylor, isExact, isAll, prec, isMainProgram):
 		res = {'results': {}}
 
+		lastMethodUsed = None
+
 		# do the calculations based on mode
 		if p is not None:
 			dText, pText = _BirthdayProblemTextFormatter.headerTextBirthdayProblemInvNumbers(dLog if isBinary else d, p, pPercent, isBinary, prec)
 			res['d'] = dText
 			res['p'] = pText
-			lastMethodUsed = None
 			for (method, included) in [(_BirthdayProblemSolver.CalcPrecision.EXACT, isExact), (_BirthdayProblemSolver.CalcPrecision.TAYLOR_APPROX, isTaylor)]:
 				if (included or isAll) and lastMethodUsed != _BirthdayProblemSolver.CalcPrecision.TRIVIAL:
 					try:
@@ -1122,7 +1123,6 @@ def solveJson(d, dLog, n, nLog, p, pPercent, isBinary, isStirling, isTaylor, isE
 			dText, nText  = _BirthdayProblemTextFormatter.headerTextBirthdayProblemNumbers(dLog if isBinary else d, nLog if isBinary else n, isBinary, prec)
 			res['d'] = dText
 			res['n'] = nText
-			lastMethodUsed = None
 			for (method, included) in [(_BirthdayProblemSolver.CalcPrecision.EXACT, isExact), (_BirthdayProblemSolver.CalcPrecision.STIRLING_APPROX, isStirling), (_BirthdayProblemSolver.CalcPrecision.TAYLOR_APPROX, isTaylor)]:
 				if (included or isAll) and lastMethodUsed != _BirthdayProblemSolver.CalcPrecision.TRIVIAL:
 					try: