Move Decimal from the sandbox into production.
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
new file mode 100644
index 0000000..b3fb0ad
--- /dev/null
+++ b/Lib/test/test_decimal.py
@@ -0,0 +1,1082 @@
+# Copyright (c) 2004 Python Software Foundation.
+# All rights reserved.
+
+# Written by Eric Price <eprice at tjhsst.edu>
+# and Facundo Batista <facundo at taniquetil.com.ar>
+# and Raymond Hettinger <python at rcn.com>
+# and Aahz (aahz at pobox.com)
+# and Tim Peters
+
+"""
+These are the test cases for the Decimal module.
+
+There are two groups of tests, Arithmetic and Behaviour. The former test
+the Decimal arithmetic using the tests provided by Mike Cowlishaw. The latter
+test the pythonic behaviour according to PEP 327.
+
+Cowlishaw's tests can be downloaded from:
+
+ www2.hursley.ibm.com/decimal/dectest.zip
+
+This test module can be called from command line with one parameter (Arithmetic
+or Behaviour) to test each part, or without parameter to test both parts. If
+you're working through IDLE, you can import this test module and call test_main()
+with the corresponding argument.
+"""
+
+from __future__ import division
+
+import unittest
+import glob
+import os, sys
+import pickle, copy
+from decimal import *
+from test.test_support import TestSkipped, run_unittest, run_doctest, is_resource_enabled
+import threading
+
+TESTDATADIR = 'decimaltestdata'
+dir = os.curdir + os.sep + TESTDATADIR + os.sep
+
+skip_expected = not os.path.isdir(dir)
+
+# Make sure it actually raises errors when not expected and caught in flags
+# Slower, since it runs some things several times.
+EXTENDEDERRORTEST = False
+
+
+#Map the test cases' error names to the actual errors
+
+ErrorNames = {'clamped' : Clamped,
+ 'conversion_syntax' : ConversionSyntax,
+ 'division_by_zero' : DivisionByZero,
+ 'division_impossible' : DivisionImpossible,
+ 'division_undefined' : DivisionUndefined,
+ 'inexact' : Inexact,
+ 'invalid_context' : InvalidContext,
+ 'invalid_operation' : InvalidOperation,
+ 'overflow' : Overflow,
+ 'rounded' : Rounded,
+ 'subnormal' : Subnormal,
+ 'underflow' : Underflow}
+
+
+def Nonfunction(*args):
+ """Doesn't do anything."""
+ return None
+
+RoundingDict = {'ceiling' : ROUND_CEILING, #Maps test-case names to roundings.
+ 'down' : ROUND_DOWN,
+ 'floor' : ROUND_FLOOR,
+ 'half_down' : ROUND_HALF_DOWN,
+ 'half_even' : ROUND_HALF_EVEN,
+ 'half_up' : ROUND_HALF_UP,
+ 'up' : ROUND_UP}
+
+# Name adapter to be able to change the Decimal and Context
+# interface without changing the test files from Cowlishaw
+nameAdapter = {'toeng':'to_eng_string',
+ 'tosci':'to_sci_string',
+ 'samequantum':'same_quantum',
+ 'tointegral':'to_integral',
+ 'remaindernear':'remainder_near',
+ 'divideint':'divide_int',
+ 'squareroot':'sqrt',
+ 'apply':'_apply',
+ }
+
+class DecimalTest(unittest.TestCase):
+ """Class which tests the Decimal class against the test cases.
+
+ Changed for unittest.
+ """
+ def setUp(self):
+ global dir
+ self.context = Context()
+ for key in DefaultContext.trap_enablers.keys():
+ DefaultContext.trap_enablers[key] = 1
+ self.ignore_list = ['#']
+ # Basically, a # means return NaN InvalidOperation.
+ # Different from a sNaN in trim
+
+ self.ChangeDict = {'precision' : self.change_precision,
+ 'rounding' : self.change_rounding_method,
+ 'maxexponent' : self.change_max_exponent,
+ 'minexponent' : self.change_min_exponent,
+ 'clamp' : self.change_clamp}
+
+ def tearDown(self):
+ """Cleaning up enviroment."""
+ # leaving context in original state
+ for key in DefaultContext.trap_enablers.keys():
+ DefaultContext.trap_enablers[key] = 0
+ return
+
+ def eval_file(self, file):
+ global skip_expected
+ if skip_expected:
+ raise TestSkipped
+ return
+ for line in open(file).xreadlines():
+ line = line.replace('\r\n', '').replace('\n', '')
+ try:
+ t = self.eval_line(line)
+ except ConversionSyntax:
+ print 'Error in test cases:'
+ print line
+ continue
+ except DecimalException, exception:
+ #Exception raised where there shoudn't have been one.
+ self.fail('Exception "'+exception.__class__.__name__ + '" raised on line '+line)
+
+ return
+
+ def eval_line(self, s):
+ if s.find(' -> ') >= 0 and s[:2] != '--' and not s.startswith(' --'):
+ s = (s.split('->')[0] + '->' +
+ s.split('->')[1].split('--')[0]).strip()
+ else:
+ s = s.split('--')[0].strip()
+
+ for ignore in self.ignore_list:
+ if s.find(ignore) >= 0:
+ #print s.split()[0], 'NotImplemented--', ignore
+ return
+ if not s:
+ return
+ elif ':' in s:
+ return self.eval_directive(s)
+ else:
+ return self.eval_equation(s)
+
+ def eval_directive(self, s):
+ funct, value = map(lambda x: x.strip().lower(), s.split(':'))
+ if funct == 'rounding':
+ value = RoundingDict[value]
+ else:
+ try:
+ value = int(value)
+ except ValueError:
+ pass
+
+ funct = self.ChangeDict.get(funct, Nonfunction)
+ funct(value)
+
+ def eval_equation(self, s):
+ #global DEFAULT_PRECISION
+ #print DEFAULT_PRECISION
+ try:
+ Sides = s.split('->')
+ L = Sides[0].strip().split()
+ id = L[0]
+# print id,
+ funct = L[1].lower()
+ valstemp = L[2:]
+ L = Sides[1].strip().split()
+ ans = L[0]
+ exceptions = L[1:]
+ except (TypeError, AttributeError, IndexError):
+ raise ConversionSyntax
+ def FixQuotes(val):
+ val = val.replace("''", 'SingleQuote').replace('""', 'DoubleQuote')
+ val = val.replace("'", '').replace('"', '')
+ val = val.replace('SingleQuote', "'").replace('DoubleQuote', '"')
+ return val
+ fname = nameAdapter.get(funct, funct)
+ if fname == 'rescale':
+ return
+ funct = getattr(self.context, fname)
+ vals = []
+ conglomerate = ''
+ quote = 0
+ theirexceptions = [ErrorNames[x.lower()] for x in exceptions]
+
+ for exception in ExceptionList:
+ self.context.trap_enablers[exception] = 1 #Catch these bugs...
+ for exception in theirexceptions:
+ self.context.trap_enablers[exception] = 0
+ for i, val in enumerate(valstemp):
+ if val.count("'") % 2 == 1:
+ quote = 1 - quote
+ if quote:
+ conglomerate = conglomerate + ' ' + val
+ continue
+ else:
+ val = conglomerate + val
+ conglomerate = ''
+ v = FixQuotes(val)
+ if fname in ('to_sci_string', 'to_eng_string'):
+ if EXTENDEDERRORTEST:
+ for error in theirexceptions:
+ self.context.trap_enablers[error] = 1
+ try:
+ funct(self.context.create_decimal(v))
+ except error:
+ pass
+ except ExceptionList, e:
+ self.fail("Raised %s in %s when %s disabled" % \
+ (e, s, error))
+ else:
+ self.fail("Did not raise %s in %s" % (error, s))
+ self.context.trap_enablers[error] = 0
+ v = self.context.create_decimal(v)
+ else:
+ v = Decimal(v)
+ vals.append(v)
+
+ ans = FixQuotes(ans)
+
+ if EXTENDEDERRORTEST and fname not in ('to_sci_string', 'to_eng_string'):
+ for error in theirexceptions:
+ self.context.trap_enablers[error] = 1
+ try:
+ funct(*vals)
+ except error:
+ pass
+ except ExceptionList, e:
+ self.fail("Raised %s in %s when %s disabled" % \
+ (e, s, error))
+ else:
+ self.fail("Did not raise %s in %s" % (error, s))
+ self.context.trap_enablers[error] = 0
+ try:
+ result = str(funct(*vals))
+ if fname == 'same_quantum':
+ result = str(int(eval(result))) # 'True', 'False' -> '1', '0'
+ except ExceptionList, error:
+ self.fail("Raised %s in %s" % (error, s))
+ except: #Catch any error long enough to state the test case.
+ print "ERROR:", s
+ raise
+
+ myexceptions = self.getexceptions()
+ self.resetflags()
+
+ myexceptions.sort()
+ theirexceptions.sort()
+
+ self.assertEqual(result, ans,
+ 'Incorrect answer for ' + s + ' -- got ' + result)
+ self.assertEqual(myexceptions, theirexceptions,
+ 'Incorrect flags set in ' + s + ' -- got ' \
+ + str(myexceptions))
+ return
+
+ def getexceptions(self):
+ L = []
+ for exception in ExceptionList:
+ if self.context.flags[exception]:
+ L.append(exception)
+ return L
+
+ def resetflags(self):
+ for exception in ExceptionList:
+ self.context.flags[exception] = 0
+
+ def change_precision(self, prec):
+ self.context.prec = prec
+ def change_rounding_method(self, rounding):
+ self.context.rounding = rounding
+ def change_min_exponent(self, exp):
+ self.context.Emin = exp
+ def change_max_exponent(self, exp):
+ self.context.Emax = exp
+ def change_clamp(self, clamp):
+ self.context._clamp = clamp
+
+ def test_abs(self):
+ self.eval_file(dir + 'abs' + '.decTest')
+
+ def test_add(self):
+ self.eval_file(dir + 'add' + '.decTest')
+
+ def test_base(self):
+ self.eval_file(dir + 'base' + '.decTest')
+
+ def test_clamp(self):
+ self.eval_file(dir + 'clamp' + '.decTest')
+
+ def test_compare(self):
+ self.eval_file(dir + 'compare' + '.decTest')
+
+ def test_divide(self):
+ self.eval_file(dir + 'divide' + '.decTest')
+
+ def test_divideint(self):
+ self.eval_file(dir + 'divideint' + '.decTest')
+
+ def test_inexact(self):
+ self.eval_file(dir + 'inexact' + '.decTest')
+
+ def test_max(self):
+ self.eval_file(dir + 'max' + '.decTest')
+
+ def test_min(self):
+ self.eval_file(dir + 'min' + '.decTest')
+
+ def test_minus(self):
+ self.eval_file(dir + 'minus' + '.decTest')
+
+ def test_multiply(self):
+ self.eval_file(dir+'multiply'+'.decTest')
+
+ def test_normalize(self):
+ self.eval_file(dir + 'normalize' + '.decTest')
+
+ def test_plus(self):
+ self.eval_file(dir + 'plus' + '.decTest')
+
+ def test_power(self):
+ self.eval_file(dir + 'power' + '.decTest')
+
+ def test_quantize(self):
+ self.eval_file(dir + 'quantize' + '.decTest')
+
+ def test_randomBound32(self):
+ self.eval_file(dir + 'randomBound32' + '.decTest')
+
+ def test_randoms(self):
+ self.eval_file(dir + 'randoms' + '.decTest')
+
+ def test_remainder(self):
+ self.eval_file(dir + 'remainder' + '.decTest')
+
+ def test_remainderNear(self):
+ self.eval_file(dir + 'remainderNear' + '.decTest')
+
+ def test_rounding(self):
+ self.eval_file(dir + 'rounding' + '.decTest')
+
+ def test_samequantum(self):
+ self.eval_file(dir + 'samequantum' + '.decTest')
+
+ def test_squareroot(self):
+ self.eval_file(dir + 'squareroot' + '.decTest')
+
+ def test_subtract(self):
+ self.eval_file(dir + 'subtract' + '.decTest')
+
+ def test_tointegral(self):
+ self.eval_file(dir + 'tointegral' + '.decTest')
+
+
+# The following classes test the behaviour of Decimal according to PEP 327
+
+
+class DecimalExplicitConstructionTest(unittest.TestCase):
+ '''Unit tests for Explicit Construction cases of Decimal.'''
+
+ def test_explicit_empty(self):
+ self.assertEqual(Decimal(), Decimal("0"))
+
+ def test_explicit_from_None(self):
+ self.assertRaises(TypeError, Decimal, None)
+
+ def test_explicit_from_int(self):
+
+ #positive
+ d = Decimal(45)
+ self.assertEqual(str(d), '45')
+
+ #very large positive
+ d = Decimal(500000123)
+ self.assertEqual(str(d), '500000123')
+
+ #negative
+ d = Decimal(-45)
+ self.assertEqual(str(d), '-45')
+
+ #zero
+ d = Decimal(0)
+ self.assertEqual(str(d), '0')
+
+ def test_explicit_from_string(self):
+ '''Explicit construction with string.'''
+
+ #empty
+ self.assertEqual(str(Decimal('')), 'NaN')
+
+ #int
+ self.assertEqual(str(Decimal('45')), '45')
+
+ #float
+ self.assertEqual(str(Decimal('45.34')), '45.34')
+
+ #engineer notation
+ self.assertEqual(str(Decimal('45e2')), '4.5E+3')
+
+ #just not a number
+ self.assertEqual(str(Decimal('ugly')), 'NaN')
+
+ def test_explicit_from_tuples(self):
+
+ #zero
+ d = Decimal( (0, (0,), 0) )
+ self.assertEqual(str(d), '0')
+
+ #int
+ d = Decimal( (1, (4, 5), 0) )
+ self.assertEqual(str(d), '-45')
+
+ #float
+ d = Decimal( (0, (4, 5, 3, 4), -2) )
+ self.assertEqual(str(d), '45.34')
+
+ #weird
+ d = Decimal( (1, (4, 3, 4, 9, 1, 3, 5, 3, 4), -25) )
+ self.assertEqual(str(d), '-4.34913534E-17')
+
+ #wrong number of items
+ self.assertRaises(ValueError, Decimal, (1, (4, 3, 4, 9, 1)) )
+
+ #bad sign
+ self.assertRaises(ValueError, Decimal, (8, (4, 3, 4, 9, 1), 2) )
+
+ #bad exp
+ self.assertRaises(ValueError, Decimal, (1, (4, 3, 4, 9, 1), 'wrong!') )
+
+ #bad coefficients
+ self.assertRaises(ValueError, Decimal, (1, (4, 3, 4, None, 1), 2) )
+ self.assertRaises(ValueError, Decimal, (1, (4, -3, 4, 9, 1), 2) )
+
+ def test_explicit_from_Decimal(self):
+
+ #positive
+ d = Decimal(45)
+ e = Decimal(d)
+ self.assertEqual(str(e), '45')
+ self.assertNotEqual(id(d), id(e))
+
+ #very large positive
+ d = Decimal(500000123)
+ e = Decimal(d)
+ self.assertEqual(str(e), '500000123')
+ self.assertNotEqual(id(d), id(e))
+
+ #negative
+ d = Decimal(-45)
+ e = Decimal(d)
+ self.assertEqual(str(e), '-45')
+ self.assertNotEqual(id(d), id(e))
+
+ #zero
+ d = Decimal(0)
+ e = Decimal(d)
+ self.assertEqual(str(e), '0')
+ self.assertNotEqual(id(d), id(e))
+
+ def test_explicit_context_create_decimal(self):
+
+ nc = copy.copy(getcontext())
+ nc.prec = 3
+
+ # empty
+ self.assertRaises(TypeError, nc.create_decimal)
+
+ # from None
+ self.assertRaises(TypeError, nc.create_decimal, None)
+
+ # from int
+ d = nc.create_decimal(456)
+ self.failUnless(isinstance(d, Decimal))
+ self.assertEqual(nc.create_decimal(45678),
+ nc.create_decimal('457E+2'))
+
+ # from string
+ d = Decimal('456789')
+ self.assertEqual(str(d), '456789')
+ d = nc.create_decimal('456789')
+ self.assertEqual(str(d), '4.57E+5')
+
+ # from tuples
+ d = Decimal( (1, (4, 3, 4, 9, 1, 3, 5, 3, 4), -25) )
+ self.assertEqual(str(d), '-4.34913534E-17')
+ d = nc.create_decimal( (1, (4, 3, 4, 9, 1, 3, 5, 3, 4), -25) )
+ self.assertEqual(str(d), '-4.35E-17')
+
+ # from Decimal
+ prevdec = Decimal(500000123)
+ d = Decimal(prevdec)
+ self.assertEqual(str(d), '500000123')
+ d = nc.create_decimal(prevdec)
+ self.assertEqual(str(d), '5.00E+8')
+
+
+class DecimalImplicitConstructionTest(unittest.TestCase):
+ '''Unit tests for Implicit Construction cases of Decimal.'''
+
+ def test_implicit_from_None(self):
+ self.assertRaises(TypeError, eval, 'Decimal(5) + None', globals())
+
+ def test_implicit_from_int(self):
+ #normal
+ self.assertEqual(str(Decimal(5) + 45), '50')
+ #exceeding precision
+ self.assertEqual(Decimal(5) + 123456789000, Decimal(123456789000))
+
+ def test_implicit_from_string(self):
+ self.assertRaises(TypeError, eval, 'Decimal(5) + "3"', globals())
+
+ def test_implicit_from_float(self):
+ self.assertRaises(TypeError, eval, 'Decimal(5) + 2.2', globals())
+
+ def test_implicit_from_Decimal(self):
+ self.assertEqual(Decimal(5) + Decimal(45), Decimal(50))
+
+
+class DecimalArithmeticOperatorsTest(unittest.TestCase):
+ '''Unit tests for all arithmetic operators, binary and unary.'''
+
+ def test_addition(self):
+
+ d1 = Decimal('-11.1')
+ d2 = Decimal('22.2')
+
+ #two Decimals
+ self.assertEqual(d1+d2, Decimal('11.1'))
+ self.assertEqual(d2+d1, Decimal('11.1'))
+
+ #with other type, left
+ c = d1 + 5
+ self.assertEqual(c, Decimal('-6.1'))
+ self.assertEqual(type(c), type(d1))
+
+ #with other type, right
+ c = 5 + d1
+ self.assertEqual(c, Decimal('-6.1'))
+ self.assertEqual(type(c), type(d1))
+
+ #inline with decimal
+ d1 += d2
+ self.assertEqual(d1, Decimal('11.1'))
+
+ #inline with other type
+ d1 += 5
+ self.assertEqual(d1, Decimal('16.1'))
+
+ def test_subtraction(self):
+
+ d1 = Decimal('-11.1')
+ d2 = Decimal('22.2')
+
+ #two Decimals
+ self.assertEqual(d1-d2, Decimal('-33.3'))
+ self.assertEqual(d2-d1, Decimal('33.3'))
+
+ #with other type, left
+ c = d1 - 5
+ self.assertEqual(c, Decimal('-16.1'))
+ self.assertEqual(type(c), type(d1))
+
+ #with other type, right
+ c = 5 - d1
+ self.assertEqual(c, Decimal('16.1'))
+ self.assertEqual(type(c), type(d1))
+
+ #inline with decimal
+ d1 -= d2
+ self.assertEqual(d1, Decimal('-33.3'))
+
+ #inline with other type
+ d1 -= 5
+ self.assertEqual(d1, Decimal('-38.3'))
+
+ def test_multiplication(self):
+
+ d1 = Decimal('-5')
+ d2 = Decimal('3')
+
+ #two Decimals
+ self.assertEqual(d1*d2, Decimal('-15'))
+ self.assertEqual(d2*d1, Decimal('-15'))
+
+ #with other type, left
+ c = d1 * 5
+ self.assertEqual(c, Decimal('-25'))
+ self.assertEqual(type(c), type(d1))
+
+ #with other type, right
+ c = 5 * d1
+ self.assertEqual(c, Decimal('-25'))
+ self.assertEqual(type(c), type(d1))
+
+ #inline with decimal
+ d1 *= d2
+ self.assertEqual(d1, Decimal('-15'))
+
+ #inline with other type
+ d1 *= 5
+ self.assertEqual(d1, Decimal('-75'))
+
+ def test_division(self):
+
+ d1 = Decimal('-5')
+ d2 = Decimal('2')
+
+ #two Decimals
+ self.assertEqual(d1/d2, Decimal('-2.5'))
+ self.assertEqual(d2/d1, Decimal('-0.4'))
+
+ #with other type, left
+ c = d1 / 4
+ self.assertEqual(c, Decimal('-1.25'))
+ self.assertEqual(type(c), type(d1))
+
+ #with other type, right
+ c = 4 / d1
+ self.assertEqual(c, Decimal('-0.8'))
+ self.assertEqual(type(c), type(d1))
+
+ #inline with decimal
+ d1 /= d2
+ self.assertEqual(d1, Decimal('-2.5'))
+
+ #inline with other type
+ d1 /= 4
+ self.assertEqual(d1, Decimal('-0.625'))
+
+ def test_floor_division(self):
+ '''Test floor division in all its ways.'''
+
+ d1 = Decimal('5')
+ d2 = Decimal('2')
+
+ #two Decimals
+ self.assertEqual(d1//d2, Decimal('2'))
+ self.assertEqual(d2//d1, Decimal('0'))
+
+ #with other type, left
+ c = d1 // 4
+ self.assertEqual(c, Decimal('1'))
+ self.assertEqual(type(c), type(d1))
+
+ #with other type, right
+ c = 7 // d1
+ self.assertEqual(c, Decimal('1'))
+ self.assertEqual(type(c), type(d1))
+
+ #inline with decimal
+ d1 //= d2
+ self.assertEqual(d1, Decimal('2'))
+
+ #inline with other type
+ d1 //= 2
+ self.assertEqual(d1, Decimal('1'))
+
+ def test_powering(self):
+ '''Test powering in all its ways.'''
+
+ d1 = Decimal('5')
+ d2 = Decimal('2')
+
+ #two Decimals
+ self.assertEqual(d1**d2, Decimal('25'))
+ self.assertEqual(d2**d1, Decimal('32'))
+
+ #with other type, left
+ c = d1 ** 4
+ self.assertEqual(c, Decimal('625'))
+ self.assertEqual(type(c), type(d1))
+
+ #with other type, right
+ c = 7 ** d1
+ self.assertEqual(c, Decimal('16807'))
+ self.assertEqual(type(c), type(d1))
+
+ #inline with decimal
+ d1 **= d2
+ self.assertEqual(d1, Decimal('25'))
+
+ #inline with other type
+ d1 **= 4
+ self.assertEqual(d1, Decimal('390625'))
+
+ def test_module(self):
+
+ d1 = Decimal('5')
+ d2 = Decimal('2')
+
+ #two Decimals
+ self.assertEqual(d1%d2, Decimal('1'))
+ self.assertEqual(d2%d1, Decimal('2'))
+
+ #with other type, left
+ c = d1 % 4
+ self.assertEqual(c, Decimal('1'))
+ self.assertEqual(type(c), type(d1))
+
+ #with other type, right
+ c = 7 % d1
+ self.assertEqual(c, Decimal('2'))
+ self.assertEqual(type(c), type(d1))
+
+ #inline with decimal
+ d1 %= d2
+ self.assertEqual(d1, Decimal('1'))
+
+ #inline with other type
+ d1 %= 4
+ self.assertEqual(d1, Decimal('1'))
+
+ def test_floor_div_module(self):
+
+ d1 = Decimal('5')
+ d2 = Decimal('2')
+
+ #two Decimals
+ (p, q) = divmod(d1, d2)
+ self.assertEqual(p, Decimal('2'))
+ self.assertEqual(q, Decimal('1'))
+ self.assertEqual(type(p), type(d1))
+ self.assertEqual(type(q), type(d1))
+
+ #with other type, left
+ (p, q) = divmod(d1, 4)
+ self.assertEqual(p, Decimal('1'))
+ self.assertEqual(q, Decimal('1'))
+ self.assertEqual(type(p), type(d1))
+ self.assertEqual(type(q), type(d1))
+
+ #with other type, right
+ (p, q) = divmod(7, d1)
+ self.assertEqual(p, Decimal('1'))
+ self.assertEqual(q, Decimal('2'))
+ self.assertEqual(type(p), type(d1))
+ self.assertEqual(type(q), type(d1))
+
+ def test_unary_operators(self):
+ self.assertEqual(+Decimal(45), Decimal(+45)) # +
+ self.assertEqual(-Decimal(45), Decimal(-45)) # -
+ self.assertEqual(abs(Decimal(45)), abs(Decimal(-45))) # abs
+
+
+# The following are two functions used to test threading in the next class
+
+def thfunc1(cls):
+ d1 = Decimal(1)
+ d3 = Decimal(3)
+ cls.assertEqual(d1/d3, Decimal('0.333333333'))
+ cls.synchro.wait()
+ cls.assertEqual(d1/d3, Decimal('0.333333333'))
+ cls.finish1.set()
+ return
+
+def thfunc2(cls):
+ d1 = Decimal(1)
+ d3 = Decimal(3)
+ cls.assertEqual(d1/d3, Decimal('0.333333333'))
+ thiscontext = getcontext()
+ thiscontext.prec = 18
+ cls.assertEqual(d1/d3, Decimal('0.333333333333333333'))
+ cls.synchro.set()
+ cls.finish2.set()
+ return
+
+
+class DecimalUseOfContextTest(unittest.TestCase):
+ '''Unit tests for Use of Context cases in Decimal.'''
+
+ import threading
+ # Take care executing this test from IDLE, there's an issue in threading
+ # that hangs IDLE and I couldn't find it
+
+ def test_threading(self):
+ #Test the "threading isolation" of a Context.
+
+ self.synchro = threading.Event()
+ self.finish1 = threading.Event()
+ self.finish2 = threading.Event()
+
+ th1 = threading.Thread(target=thfunc1, args=(self,))
+ th2 = threading.Thread(target=thfunc2, args=(self,))
+
+ th1.start()
+ th2.start()
+
+ self.finish1.wait()
+ self.finish1.wait()
+ return
+
+
+class DecimalUsabilityTest(unittest.TestCase):
+ '''Unit tests for Usability cases of Decimal.'''
+
+ def test_comparison_operators(self):
+ '''Testing ==, !=, <, >, <=, >=, cmp.'''
+
+ da = Decimal('23.42')
+ db = Decimal('23.42')
+ dc = Decimal('45')
+
+ #two Decimals
+ self.failUnless(dc > da)
+ self.failUnless(dc >= da)
+ self.failUnless(da < dc)
+ self.failUnless(da <= dc)
+ self.failUnless(da == db)
+ self.failUnless(da != dc)
+ self.failUnless(da <= db)
+ self.failUnless(da >= db)
+ self.assertEqual(cmp(dc,da), 1)
+ self.assertEqual(cmp(da,dc), -1)
+ self.assertEqual(cmp(da,db), 0)
+
+ #a Decimal and an int
+ self.failUnless(dc > 23)
+ self.failUnless(23 < dc)
+ self.failUnless(dc == 45)
+ self.assertEqual(cmp(dc,23), 1)
+ self.assertEqual(cmp(23,dc), -1)
+ self.assertEqual(cmp(dc,45), 0)
+
+ #a Decimal and uncomparable
+ try: da == 'ugly'
+ except TypeError: pass
+ else: self.fail('Did not raised an error!')
+
+ try: da == '32.7'
+ except TypeError: pass
+ else: self.fail('Did not raised an error!')
+
+ try: da == object
+ except TypeError: pass
+ else: self.fail('Did not raised an error!')
+
+ def test_copy_and_deepcopy_methods(self):
+ d = Decimal('43.24')
+ c = copy.copy(d)
+ self.assertEqual(id(c), id(d))
+ dc = copy.deepcopy(d)
+ self.assertEqual(id(dc), id(d))
+
+ def test_hash_method(self):
+ #just that it's hashable
+ hash(Decimal(23))
+ #the same hash that to an int
+ self.assertEqual(hash(Decimal(23)), hash(23))
+
+ def test_min_and_max_methods(self):
+
+ d1 = Decimal('15.32')
+ d2 = Decimal('28.5')
+ l1 = 15
+ l2 = 28
+
+ #between Decimals
+ self.failUnless(min(d1,d2) is d1)
+ self.failUnless(min(d2,d1) is d1)
+ self.failUnless(max(d1,d2) is d2)
+ self.failUnless(max(d2,d1) is d2)
+
+ #between Decimal and long
+ self.failUnless(min(d1,l2) is d1)
+ self.failUnless(min(l2,d1) is d1)
+ self.failUnless(max(l1,d2) is d2)
+ self.failUnless(max(d2,l1) is d2)
+
+ def test_as_nonzero(self):
+ #as false
+ self.failIf(Decimal(0))
+ #as true
+ self.failUnless(Decimal('0.372'))
+
+ def test_tostring_methods(self):
+ #Test str and repr methods.
+
+ d = Decimal('15.32')
+ self.assertEqual(str(d), '15.32') # str
+ self.assertEqual(repr(d), 'Decimal("15.32")') # repr
+
+ def test_tonum_methods(self):
+ #Test float, int and long methods.
+
+ d1 = Decimal('66')
+ d2 = Decimal('15.32')
+
+ #int
+ self.assertEqual(int(d1), 66)
+ self.assertEqual(int(d2), 15)
+
+ #long
+ self.assertEqual(long(d1), 66)
+ self.assertEqual(long(d2), 15)
+
+ #float
+ self.assertEqual(float(d1), 66)
+ self.assertEqual(float(d2), 15.32)
+
+ def test_eval_round_trip(self):
+
+ #with zero
+ d = Decimal( (0, (0,), 0) )
+ self.assertEqual(d, eval(repr(d)))
+
+ #int
+ d = Decimal( (1, (4, 5), 0) )
+ self.assertEqual(d, eval(repr(d)))
+
+ #float
+ d = Decimal( (0, (4, 5, 3, 4), -2) )
+ self.assertEqual(d, eval(repr(d)))
+
+ #weird
+ d = Decimal( (1, (4, 3, 4, 9, 1, 3, 5, 3, 4), -25) )
+ self.assertEqual(d, eval(repr(d)))
+
+ def test_as_tuple(self):
+
+ #with zero
+ d = Decimal(0)
+ self.assertEqual(d.as_tuple(), (0, (0,), 0) )
+
+ #int
+ d = Decimal(-45)
+ self.assertEqual(d.as_tuple(), (1, (4, 5), 0) )
+
+ #complicated string
+ d = Decimal("-4.34913534E-17")
+ self.assertEqual(d.as_tuple(), (1, (4, 3, 4, 9, 1, 3, 5, 3, 4), -25) )
+
+ #inf
+ d = Decimal("Infinity")
+ self.assertEqual(d.as_tuple(), (0, (0,), 'F') )
+
+ def test_immutability_onpurpose(self):
+ #Try to change internal objects and see if immutable.
+
+ d = Decimal(42)
+
+ #you can get the attributes...
+ d.exp
+ d.int
+ d.sign
+
+ #...but not change them!
+ try:
+ d.exp = 20
+ d.int = 3
+ d.sign = 1
+ except AttributeError:
+ pass
+ else:
+ self.fail('Did not raised an error!')
+
+ #some new attribute
+ try:
+ d.newone = None
+ except AttributeError:
+ pass
+ else:
+ self.fail('Did not raised an error!')
+
+ def test_immutability_operations(self):
+ # Do operations and check that it didn't change change internal objects.
+
+ d1 = Decimal('-25e55')
+ b1 = Decimal('-25e55')
+ d2 = Decimal('33e-33')
+ b2 = Decimal('33e-33')
+
+ def checkSameDec(operation, useOther=False):
+ if useOther:
+ eval("d1." + operation + "(d2)")
+ self.assertEqual(d1._sign, b1._sign)
+ self.assertEqual(d1._int, b1._int)
+ self.assertEqual(d1._exp, b1._exp)
+ self.assertEqual(d2._sign, b2._sign)
+ self.assertEqual(d2._int, b2._int)
+ self.assertEqual(d2._exp, b2._exp)
+ else:
+ eval("d1." + operation + "()")
+ self.assertEqual(d1._sign, b1._sign)
+ self.assertEqual(d1._int, b1._int)
+ self.assertEqual(d1._exp, b1._exp)
+ return
+
+ Decimal(d1)
+ self.assertEqual(d1._sign, b1._sign)
+ self.assertEqual(d1._int, b1._int)
+ self.assertEqual(d1._exp, b1._exp)
+
+ checkSameDec("__abs__")
+ checkSameDec("__add__", True)
+ checkSameDec("__div__", True)
+ checkSameDec("__divmod__", True)
+ checkSameDec("__cmp__", True)
+ checkSameDec("__float__")
+ checkSameDec("__floordiv__", True)
+ checkSameDec("__hash__")
+ checkSameDec("__int__")
+ checkSameDec("__long__")
+ checkSameDec("__mod__", True)
+ checkSameDec("__mul__", True)
+ checkSameDec("__neg__")
+ checkSameDec("__nonzero__")
+ checkSameDec("__pos__")
+ checkSameDec("__pow__", True)
+ checkSameDec("__radd__", True)
+ checkSameDec("__rdiv__", True)
+ checkSameDec("__rdivmod__", True)
+ checkSameDec("__repr__")
+ checkSameDec("__rfloordiv__", True)
+ checkSameDec("__rmod__", True)
+ checkSameDec("__rmul__", True)
+ checkSameDec("__rpow__", True)
+ checkSameDec("__rsub__", True)
+ checkSameDec("__str__")
+ checkSameDec("__sub__", True)
+ checkSameDec("__truediv__", True)
+ checkSameDec("adjusted")
+ checkSameDec("as_tuple")
+ checkSameDec("compare", True)
+ checkSameDec("max", True)
+ checkSameDec("min", True)
+ checkSameDec("normalize")
+ checkSameDec("quantize", True)
+ checkSameDec("remainder_near", True)
+ checkSameDec("same_quantum", True)
+ checkSameDec("sqrt")
+ checkSameDec("to_eng_string")
+ checkSameDec("to_integral")
+
+class DecimalPythonAPItests(unittest.TestCase):
+
+ def test_pickle(self):
+ d = Decimal('-3.141590000')
+ p = pickle.dumps(d)
+ e = pickle.loads(p)
+ self.assertEqual(d, e)
+
+def test_main(arith=False, verbose=None):
+ """ Execute the tests.
+
+ Runs arithmetic tests if arith is True or if the "decimal" resource
+ is enables in regrtest.py
+ """
+ test_classes = [
+ DecimalExplicitConstructionTest,
+ DecimalImplicitConstructionTest,
+ DecimalArithmeticOperatorsTest,
+ DecimalUseOfContextTest,
+ DecimalUsabilityTest,
+ DecimalPythonAPItests,
+ ]
+
+ if arith or is_resource_enabled('decimal'):
+ test_classes.extend([DecimalTest])
+
+ run_unittest(*test_classes)
+ import decimal as DecimalModule
+ run_doctest(DecimalModule, verbose)
+ return
+
+
+if __name__ == '__main__':
+ # Calling with no arguments runs all tests.
+ # Calling with "Skip" will skipover the arithmetic tests.
+ if len(sys.argv) == 1:
+ test_main(arith=True, verbose=True)
+ elif len(sys.argv) == 2:
+ arith = sys.argv[1].lower() != 'skip'
+ test_main(arith=arith, verbose=True)
+ else:
+ raise ValueError("test called with wrong arguments, use test_Decimal [Skip]")