/Lib/test/test_decimal.py
Python | 1558 lines | 1361 code | 111 blank | 86 comment | 30 complexity | 69c12013d43ba66bc20d09a64ce264cd MD5 | raw file
Possible License(s): 0BSD, BSD-3-Clause
- # 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.
- """
- import glob
- import math
- import os, sys
- import pickle, copy
- import unittest
- from decimal import *
- import numbers
- from test.test_support import (TestSkipped, run_unittest, run_doctest,
- is_resource_enabled)
- import random
- try:
- import threading
- except ImportError:
- threading = None
- # Useful Test Constant
- Signals = getcontext().flags.keys()
- # Tests are built around these assumed context defaults.
- # test_main() restores the original context.
- def init():
- global ORIGINAL_CONTEXT
- ORIGINAL_CONTEXT = getcontext().copy()
- DefaultTestContext = Context(
- prec = 9,
- rounding = ROUND_HALF_EVEN,
- traps = dict.fromkeys(Signals, 0)
- )
- setcontext(DefaultTestContext)
- TESTDATADIR = 'decimaltestdata'
- if __name__ == '__main__':
- file = sys.argv[0]
- else:
- file = __file__
- testdir = os.path.dirname(file) or os.curdir
- directory = testdir + os.sep + TESTDATADIR + os.sep
- skip_expected = not os.path.isdir(directory)
- # 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' : InvalidOperation,
- 'division_by_zero' : DivisionByZero,
- 'division_impossible' : InvalidOperation,
- 'division_undefined' : InvalidOperation,
- 'inexact' : Inexact,
- 'invalid_context' : InvalidOperation,
- '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,
- '05up' : ROUND_05UP}
- # Name adapter to be able to change the Decimal and Context
- # interface without changing the test files from Cowlishaw
- nameAdapter = {'and':'logical_and',
- 'apply':'_apply',
- 'class':'number_class',
- 'comparesig':'compare_signal',
- 'comparetotal':'compare_total',
- 'comparetotmag':'compare_total_mag',
- 'copy':'copy_decimal',
- 'copyabs':'copy_abs',
- 'copynegate':'copy_negate',
- 'copysign':'copy_sign',
- 'divideint':'divide_int',
- 'invert':'logical_invert',
- 'iscanonical':'is_canonical',
- 'isfinite':'is_finite',
- 'isinfinite':'is_infinite',
- 'isnan':'is_nan',
- 'isnormal':'is_normal',
- 'isqnan':'is_qnan',
- 'issigned':'is_signed',
- 'issnan':'is_snan',
- 'issubnormal':'is_subnormal',
- 'iszero':'is_zero',
- 'maxmag':'max_mag',
- 'minmag':'min_mag',
- 'nextminus':'next_minus',
- 'nextplus':'next_plus',
- 'nexttoward':'next_toward',
- 'or':'logical_or',
- 'reduce':'normalize',
- 'remaindernear':'remainder_near',
- 'samequantum':'same_quantum',
- 'squareroot':'sqrt',
- 'toeng':'to_eng_string',
- 'tointegral':'to_integral_value',
- 'tointegralx':'to_integral_exact',
- 'tosci':'to_sci_string',
- 'xor':'logical_xor',
- }
- # The following functions return True/False rather than a Decimal instance
- LOGICAL_FUNCTIONS = (
- 'is_canonical',
- 'is_finite',
- 'is_infinite',
- 'is_nan',
- 'is_normal',
- 'is_qnan',
- 'is_signed',
- 'is_snan',
- 'is_subnormal',
- 'is_zero',
- 'same_quantum',
- )
- # For some operations (currently exp, ln, log10, power), the decNumber
- # reference implementation imposes additional restrictions on the
- # context and operands. These restrictions are not part of the
- # specification; however, the effect of these restrictions does show
- # up in some of the testcases. We skip testcases that violate these
- # restrictions, since Decimal behaves differently from decNumber for
- # these testcases so these testcases would otherwise fail.
- decNumberRestricted = ('power', 'ln', 'log10', 'exp')
- DEC_MAX_MATH = 999999
- def outside_decNumber_bounds(v, context):
- if (context.prec > DEC_MAX_MATH or
- context.Emax > DEC_MAX_MATH or
- -context.Emin > DEC_MAX_MATH):
- return True
- if not v._is_special and v and (
- v.adjusted() > DEC_MAX_MATH or
- v.adjusted() < 1-2*DEC_MAX_MATH):
- return True
- return False
- class DecimalTest(unittest.TestCase):
- """Class which tests the Decimal class against the test cases.
- Changed for unittest.
- """
- def setUp(self):
- self.context = Context()
- 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 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', '')
- #print line
- try:
- t = self.eval_line(line)
- 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
- if not TEST_ALL and random.random() < 0.90:
- return
- try:
- Sides = s.split('->')
- L = Sides[0].strip().split()
- id = L[0]
- if DEBUG:
- print "Test ", id,
- funct = L[1].lower()
- valstemp = L[2:]
- L = Sides[1].strip().split()
- ans = L[0]
- exceptions = L[1:]
- except (TypeError, AttributeError, IndexError):
- raise InvalidOperation
- 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 Signals:
- self.context.traps[exception] = 1 #Catch these bugs...
- for exception in theirexceptions:
- self.context.traps[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.traps[error] = 1
- try:
- funct(self.context.create_decimal(v))
- except error:
- pass
- except Signals, 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.traps[error] = 0
- v = self.context.create_decimal(v)
- else:
- v = Decimal(v, self.context)
- vals.append(v)
- ans = FixQuotes(ans)
- # skip tests that are related to bounds imposed in the decNumber
- # reference implementation
- if fname in decNumberRestricted:
- if fname == 'power':
- if not (vals[1]._isinteger() and
- -1999999997 <= vals[1] <= 999999999):
- if outside_decNumber_bounds(vals[0], self.context) or \
- outside_decNumber_bounds(vals[1], self.context):
- #print "Skipping test %s" % s
- return
- else:
- if outside_decNumber_bounds(vals[0], self.context):
- #print "Skipping test %s" % s
- return
- if EXTENDEDERRORTEST and fname not in ('to_sci_string', 'to_eng_string'):
- for error in theirexceptions:
- self.context.traps[error] = 1
- try:
- funct(*vals)
- except error:
- pass
- except Signals, 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.traps[error] = 0
- if DEBUG:
- print "--", self.context
- try:
- result = str(funct(*vals))
- if fname in LOGICAL_FUNCTIONS:
- result = str(int(eval(result))) # 'True', 'False' -> '1', '0'
- except Signals, 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.context.clear_flags()
- 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):
- return [e for e in Signals if self.context.flags[e]]
- 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
- # 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):
- #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')
- #leading and trailing whitespace permitted
- self.assertEqual(str(Decimal('1.3E4 \n')), '1.3E+4')
- self.assertEqual(str(Decimal(' -7.89')), '-7.89')
- #unicode strings should be permitted
- self.assertEqual(str(Decimal(u'0E-017')), '0E-17')
- self.assertEqual(str(Decimal(u'45')), '45')
- self.assertEqual(str(Decimal(u'-Inf')), '-Infinity')
- self.assertEqual(str(Decimal(u'NaN123')), 'NaN123')
- 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) )
- self.assertRaises(ValueError, Decimal, (0., (4, 3, 4, 9, 1), 2) )
- self.assertRaises(ValueError, Decimal, (Decimal(1), (4, 3, 4, 9, 1), 2))
- #bad exp
- self.assertRaises(ValueError, Decimal, (1, (4, 3, 4, 9, 1), 'wrong!') )
- self.assertRaises(ValueError, Decimal, (1, (4, 3, 4, 9, 1), 0.) )
- self.assertRaises(ValueError, Decimal, (1, (4, 3, 4, 9, 1), '1') )
- #bad coefficients
- self.assertRaises(ValueError, Decimal, (1, (4, 3, 4, None, 1), 2) )
- self.assertRaises(ValueError, Decimal, (1, (4, -3, 4, 9, 1), 2) )
- self.assertRaises(ValueError, Decimal, (1, (4, 10, 4, 9, 1), 2) )
- self.assertRaises(ValueError, Decimal, (1, (4, 3, 4, 'a', 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
- d = Decimal()
- self.assertEqual(str(d), '0')
- d = nc.create_decimal()
- self.assertEqual(str(d), '0')
- # 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')
- # leading and trailing whitespace should result in a NaN;
- # spaces are already checked in Cowlishaw's test-suite, so
- # here we just check that a trailing newline results in a NaN
- self.assertEqual(str(nc.create_decimal('3.14\n')), 'NaN')
- # 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')
- def test_unicode_digits(self):
- test_values = {
- u'\uff11': '1',
- u'\u0660.\u0660\u0663\u0667\u0662e-\u0663' : '0.0000372',
- u'-nan\u0c68\u0c6a\u0c66\u0c66' : '-NaN2400',
- }
- for input, expected in test_values.items():
- self.assertEqual(str(Decimal(input)), expected)
- 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))
- def test_rop(self):
- # Allow other classes to be trained to interact with Decimals
- class E:
- def __divmod__(self, other):
- return 'divmod ' + str(other)
- def __rdivmod__(self, other):
- return str(other) + ' rdivmod'
- def __lt__(self, other):
- return 'lt ' + str(other)
- def __gt__(self, other):
- return 'gt ' + str(other)
- def __le__(self, other):
- return 'le ' + str(other)
- def __ge__(self, other):
- return 'ge ' + str(other)
- def __eq__(self, other):
- return 'eq ' + str(other)
- def __ne__(self, other):
- return 'ne ' + str(other)
- self.assertEqual(divmod(E(), Decimal(10)), 'divmod 10')
- self.assertEqual(divmod(Decimal(10), E()), '10 rdivmod')
- self.assertEqual(eval('Decimal(10) < E()'), 'gt 10')
- self.assertEqual(eval('Decimal(10) > E()'), 'lt 10')
- self.assertEqual(eval('Decimal(10) <= E()'), 'ge 10')
- self.assertEqual(eval('Decimal(10) >= E()'), 'le 10')
- self.assertEqual(eval('Decimal(10) == E()'), 'eq 10')
- self.assertEqual(eval('Decimal(10) != E()'), 'ne 10')
- # insert operator methods and then exercise them
- oplist = [
- ('+', '__add__', '__radd__'),
- ('-', '__sub__', '__rsub__'),
- ('*', '__mul__', '__rmul__'),
- ('%', '__mod__', '__rmod__'),
- ('//', '__floordiv__', '__rfloordiv__'),
- ('**', '__pow__', '__rpow__')
- ]
- if 1/2 == 0:
- # testing with classic division, so add __div__
- oplist.append(('/', '__div__', '__rdiv__'))
- else:
- # testing with -Qnew, so add __truediv__
- oplist.append(('/', '__truediv__', '__rtruediv__'))
- for sym, lop, rop in oplist:
- setattr(E, lop, lambda self, other: 'str' + lop + str(other))
- setattr(E, rop, lambda self, other: str(other) + rop + 'str')
- self.assertEqual(eval('E()' + sym + 'Decimal(10)'),
- 'str' + lop + '10')
- self.assertEqual(eval('Decimal(10)' + sym + 'E()'),
- '10' + rop + 'str')
- class DecimalFormatTest(unittest.TestCase):
- '''Unit tests for the format function.'''
- def test_formatting(self):
- # triples giving a format, a Decimal, and the expected result
- test_values = [
- ('e', '0E-15', '0e-15'),
- ('e', '2.3E-15', '2.3e-15'),
- ('e', '2.30E+2', '2.30e+2'), # preserve significant zeros
- ('e', '2.30000E-15', '2.30000e-15'),
- ('e', '1.23456789123456789e40', '1.23456789123456789e+40'),
- ('e', '1.5', '1.5e+0'),
- ('e', '0.15', '1.5e-1'),
- ('e', '0.015', '1.5e-2'),
- ('e', '0.0000000000015', '1.5e-12'),
- ('e', '15.0', '1.50e+1'),
- ('e', '-15', '-1.5e+1'),
- ('e', '0', '0e+0'),
- ('e', '0E1', '0e+1'),
- ('e', '0.0', '0e-1'),
- ('e', '0.00', '0e-2'),
- ('.6e', '0E-15', '0.000000e-9'),
- ('.6e', '0', '0.000000e+6'),
- ('.6e', '9.999999', '9.999999e+0'),
- ('.6e', '9.9999999', '1.000000e+1'),
- ('.6e', '-1.23e5', '-1.230000e+5'),
- ('.6e', '1.23456789e-3', '1.234568e-3'),
- ('f', '0', '0'),
- ('f', '0.0', '0.0'),
- ('f', '0E-2', '0.00'),
- ('f', '0.00E-8', '0.0000000000'),
- ('f', '0E1', '0'), # loses exponent information
- ('f', '3.2E1', '32'),
- ('f', '3.2E2', '320'),
- ('f', '3.20E2', '320'),
- ('f', '3.200E2', '320.0'),
- ('f', '3.2E-6', '0.0000032'),
- ('.6f', '0E-15', '0.000000'), # all zeros treated equally
- ('.6f', '0E1', '0.000000'),
- ('.6f', '0', '0.000000'),
- ('.0f', '0', '0'), # no decimal point
- ('.0f', '0e-2', '0'),
- ('.0f', '3.14159265', '3'),
- ('.1f', '3.14159265', '3.1'),
- ('.4f', '3.14159265', '3.1416'),
- ('.6f', '3.14159265', '3.141593'),
- ('.7f', '3.14159265', '3.1415926'), # round-half-even!
- ('.8f', '3.14159265', '3.14159265'),
- ('.9f', '3.14159265', '3.141592650'),
- ('g', '0', '0'),
- ('g', '0.0', '0.0'),
- ('g', '0E1', '0e+1'),
- ('G', '0E1', '0E+1'),
- ('g', '0E-5', '0.00000'),
- ('g', '0E-6', '0.000000'),
- ('g', '0E-7', '0e-7'),
- ('g', '-0E2', '-0e+2'),
- ('.0g', '3.14159265', '3'), # 0 sig fig -> 1 sig fig
- ('.1g', '3.14159265', '3'),
- ('.2g', '3.14159265', '3.1'),
- ('.5g', '3.14159265', '3.1416'),
- ('.7g', '3.14159265', '3.141593'),
- ('.8g', '3.14159265', '3.1415926'), # round-half-even!
- ('.9g', '3.14159265', '3.14159265'),
- ('.10g', '3.14159265', '3.14159265'), # don't pad
- ('%', '0E1', '0%'),
- ('%', '0E0', '0%'),
- ('%', '0E-1', '0%'),
- ('%', '0E-2', '0%'),
- ('%', '0E-3', '0.0%'),
- ('%', '0E-4', '0.00%'),
- ('.3%', '0', '0.000%'), # all zeros treated equally
- ('.3%', '0E10', '0.000%'),
- ('.3%', '0E-10', '0.000%'),
- ('.3%', '2.34', '234.000%'),
- ('.3%', '1.234567', '123.457%'),
- ('.0%', '1.23', '123%'),
- ('e', 'NaN', 'NaN'),
- ('f', '-NaN123', '-NaN123'),
- ('+g', 'NaN456', '+NaN456'),
- ('.3e', 'Inf', 'Infinity'),
- ('.16f', '-Inf', '-Infinity'),
- ('.0g', '-sNaN', '-sNaN'),
- ('', '1.00', '1.00'),
- # check alignment
- ('<6', '123', '123 '),
- ('>6', '123', ' 123'),
- ('^6', '123', ' 123 '),
- ('=+6', '123', '+ 123'),
- # issue 6850
- ('a=-7.0', '0.12345', 'aaaa0.1'),
- ]
- for fmt, d, result in test_values:
- self.assertEqual(format(Decimal(d), fmt), result)
- 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):
- 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):
- 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
- def test_nan_comparisons(self):
- n = Decimal('NaN')
- s = Decimal('sNaN')
- i = Decimal('Inf')
- f = Decimal('2')
- for x, y in [(n, n), (n, i), (i, n), (n, f), (f, n),
- (s, n), (n, s), (s, i), (i, s), (s, f), (f, s), (s, s)]:
- self.assert_(x != y)
- self.assert_(not (x == y))
- self.assert_(not (x < y))
- self.assert_(not (x <= y))
- self.assert_(not (x > y))
- self.assert_(not (x >= y))
- # The following are two functions used to test threading in the next class
- def thfunc1(cls):
- d1 = Decimal(1)
- d3 = Decimal(3)
- test1 = d1/d3
- cls.synchro.wait()
- test2 = d1/d3
- cls.finish1.set()
- cls.assertEqual(test1, Decimal('0.3333333333333333333333333333'))
- cls.assertEqual(test2, Decimal('0.3333333333333333333333333333'))
- return
- def thfunc2(cls):
- d1 = Decimal(1)
- d3 = Decimal(3)
- test1 = d1/d3
- thiscontext = getcontext()
- thiscontext.prec = 18
- test2 = d1/d3
- cls.synchro.set()
- cls.finish2.set()
- cls.assertEqual(test1, Decimal('0.3333333333333333333333333333'))
- cls.assertEqual(test2, Decimal('0.333333333333333333'))
- return
- class DecimalUseOfContextTest(unittest.TestCase):
- '''Unit tests for Use of Context cases in Decimal.'''
- try:
- import threading
- except ImportError:
- threading = None
- # 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.finish2.wait()
- return
- if threading is None:
- del test_threading
- class DecimalUsabilityTest(unittest.TestCase):
- '''Unit tests for Usability cases of Decimal.'''
- def test_comparison_operators(self):
- 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
- self.assertNotEqual(da, 'ugly')
- self.assertNotEqual(da, 32.7)
- self.assertNotEqual(da, object())
- self.assertNotEqual(da, object)
- # sortable
- a = map(Decimal, xrange(100))
- b = a[:]
- random.shuffle(a)
- a.sort()
- self.assertEqual(a, b)
- # with None
- self.assertFalse(Decimal(1) < None)
- self.assertTrue(Decimal(1) > None)
- 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))
- test_values = [Decimal(sign*(2**m + n))
- for m in [0, 14, 15, 16, 17, 30, 31,
- 32, 33, 62, 63, 64, 65, 66]
- for n in range(-10, 10)
- for sign in [-1, 1]]
- test_values.extend([
- Decimal("-0"), # zeros
- Decimal("0.00"),
- Decimal("-0.000"),
- Decimal("0E10"),
- Decimal("-0E12"),
- Decimal("10.0"), # negative exponent
- Decimal("-23.00000"),
- Decimal("1230E100"), # positive exponent
- Decimal("-4.5678E50"),
- # a value for which hash(n) != hash(n % (2**64-1))
- # in Python pre-2.6
- Decimal(2**64 + 2**32 - 1),
- # selection of values which fail with the old (before
- # version 2.6) long.__hash__
- Decimal("1.634E100"),
- Decimal("90.697E100"),
- Decimal("188.83E100"),
- Decimal("1652.9E100"),
- Decimal("56531E100"),
- ])
- # check that hash(d) == hash(int(d)) for integral values
- for value in test_values:
- self.assertEqual(hash(value), hash(int(value)))
- #the same hash that to an int
- self.assertEqual(hash(Decimal(23)), hash(23))
- self.assertRaises(TypeError, hash, Decimal('NaN'))
- self.assert_(hash(Decimal('Inf')))
- self.assert_(hash(Decimal('-Inf')))
- # check that the value of the hash doesn't depend on the
- # current context (issue #1757)
- c = getcontext()
- old_precision = c.prec
- x = Decimal("123456789.1")
- c.prec = 6
- h1 = hash(x)
- c.prec = 10
- h2 = hash(x)
- c.prec = 16
- h3 = hash(x)
- self.assertEqual(h1, h2)
- self.assertEqual(h1, h3)
- c.prec = old_precision
- 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
- # result type of string methods should be str, not unicode
- unicode_inputs = [u'123.4', u'0.5E2', u'Infinity', u'sNaN',
- u'-0.0E100', u'-NaN001', u'-Inf']
- for u in unicode_inputs:
- d = Decimal(u)
- self.assertEqual(type(str(d)), str)
- self.assertEqual(type(repr(d)), str)
- self.assertEqual(type(d.to_eng_string()), str)
- 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') )
- #leading zeros in coefficient should be stripped
- d = Decimal( (0, (0, 0, 4, 0, 5, 3, 4), -2) )
- self.assertEqual(d.as_tuple(), (0, (4, 0, 5, 3, 4), -2) )
- d = Decimal( (1, (0, 0, 0), 37) )
- self.assertEqual(d.as_tuple(), (1, (0,), 37))
- d = Decimal( (1, (), 37) )
- self.assertEqual(d.as_tuple(), (1, (0,), 37))
- #leading zeros in NaN diagnostic info should be stripped
- d = Decimal( (0, (0, 0, 4, 0, 5, 3, 4), 'n') )
- self.assertEqual(d.as_tuple(), (0, (4, 0, 5, 3, 4), 'n') )
- d = Decimal( (1, (0, 0, 0), 'N') )
- self.assertEqual(d.as_tuple(), (1, (), 'N') )
- d = Decimal( (1, (), 'n') )
- self.assertEqual(d.as_tuple(), (1, (), 'n') )
- #coefficient in infinity should be ignored
- d = Decimal( (0, (4, 5, 3, 4), 'F') )
- self.assertEqual(d.as_tuple(), (0, (0,), 'F'))
- d = Decimal( (1, (0, 2, 7, 1), 'F') )
- self.assertEqual(d.as_tuple(), (1, (0,), 'F'))
- 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("__eq__", True)
- checkSameDec("__ne__", True)
- checkSameDec("__le__", True)
- checkSameDec("__lt__", True)
- checkSameDec("__ge__", True)
- checkSameDec("__gt__", True)
- checkSameDec("__float__")
- checkSameDec("__floordiv__", True)
- checkSameDec("__hash__")
- checkSameDec("__int__")
- checkSameDec("__trunc__")
- 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")
- def test_subclassing(self):
- # Different behaviours when subclassing Decimal
- class MyDecimal(Decimal):
- pass
- d1 = MyDecimal(1)
- d2 = MyDecimal(2)
- d = d1 + d2
- self.assertTrue(type(d) is Decimal)
- d = d1.max(d2)
- self.assertTrue(type(d) is Decimal)
- def test_implicit_context(self):
- # Check results when context given implicitly. (Issue 2478)
- c = getcontext()
- self.assertEqual(str(Decimal(0).sqrt()),
- str(c.sqrt(Decimal(0))))
- class DecimalPythonAPItests(unittest.TestCase):
- def test_abc(self):
- self.assert_(issubclass(Decimal, numbers.Number))
- self.assert_(not issubclass(Decimal, numbers.Real))
- self.assert_(isinstance(Decimal(0), numbers.Number))
- self.assert_(not isinstance(Decimal(0), numbers.Real))
- def test_pickle(self):
- d = Decimal('-3.141590000')
- p = pickle.dumps(d)
- e = pickle.loads(p)
- self.assertEqual(d, e)
- def test_int(self):
- for x in range(-250, 250):
- s = '%0.2f' % (x / 100.0)
- # should work the same as for floats
- self.assertEqual(int(Decimal(s)), int(float(s)))
- # should work the same as to_integral in the ROUND_DOWN mode
- d = Decimal(s)
- r = d.to_integral(ROUND_DOWN)
- self.assertEqual(Decimal(int(d)), r)
- self.assertRaises(ValueError, int, Decimal('-nan'))
- self.assertRaises(ValueError, int, Decimal('snan'))
- self.assertRaises(OverflowError, int, Decimal('inf'))
- self.assertRaises(OverflowError, int, Decimal('-inf'))
- self.assertRaises(ValueError, long, Decimal('-nan'))
- self.assertRaises(ValueError, long, Decimal('snan'))
- self.assertRaises(OverflowError, long, Decimal('inf'))
- self.assertRaises(OverflowError, long, Decimal('-inf'))
- def test_trunc(self):
- for x in range(-250, 250):
- s = '%0.2f' % (x / 100.0)
- # should work the same as for floats
- self.assertEqual(int(Decimal(s)), int(float(s)))
- # should work the same as to_integral in the ROUND_DOWN mode
- d = Decimal(s)
- r = d.to_integral(ROUND_DOWN)
- self.assertEqual(Decimal(math.trunc(d)), r)
- class ContextAPItests(unittest.TestCase):
- def test_pickle(self):
- c = Context()
- e = pickle.loads(pickle.dumps(c))
- for k in vars(c):
- v1 = vars(c)[k]
- v2 = vars(e)[k]
- self.assertEqual(v1, v2)
- def test_equality_with_other_types(self):
- self.assert_(Decimal(10) in ['a', 1.0, Decimal(10), (1,2), {}])
- self.assert_(Decimal(10) not in ['a', 1.0, (1,2), {}])
- def test_copy(self):
- # All copies should be deep
- c = Context()
- d = c.copy()
- self.assertNotEqual(id(c), id(d))
- self.assertNotEqual(id(c.flags), id(d.flags))
- self.assertNotEqual(id(c.traps), id(d.traps))
- class WithStatementTest(unittest.TestCase):
- # Can't do these as docstrings until Python 2.6
- # as doctest can't handle __future__ statements
- def test_localcontext(self):
- # Use a copy of the current context in the block
- orig_ctx = getcontext()
- with localcontext() as enter_ctx:
- set_ctx = getcontext()
- final_ctx = getcontext()
- self.assert_(orig_ctx is final_ctx, 'did not restore context correctly')
- self.assert_(orig_ctx is not set_ctx, 'did not copy the context')
- self.assert_(set_ctx is enter_ctx, '__enter__ returned wrong context')
- def test_localcontextarg(self):
- # Use a copy of the supplied context in the block
- orig_ctx = getcontext()
- new_ctx = Context(prec=42)
- with localcontext(new_ctx) as enter_ctx:
- set_ctx = getcontext()
- final_ctx = getcontext()
- self.assert_(orig_ctx is final_ctx, 'did not restore context correctly')
- self.assert_(set_ctx.prec == new_ctx.prec, 'did not set correct context')
- self.assert_(new_ctx is not set_ctx, 'did not copy the context')
- self.assert_(set_ctx is enter_ctx, '__enter__ returned wrong context')
- class ContextFlags(unittest.TestCase):
- def test_flags_irrelevant(self):
- # check that the result (numeric result + flags raised) of an
- # arithmetic operation doesn't depend on the current flags
- context = Context(prec=9, Emin = -999999999, Emax = 999999999,
- rounding=ROUND_HALF_EVEN, traps=[], flags=[])
- # operations that raise various flags, in the form (function, arglist)
- operations = [
- (context._apply, [Decimal("100E-1000000009")]),
- (context.sqrt, [Decimal(2)]),
- (context.add, [Decimal("1.23456789"), Decimal("9.87654321")]),
- (context.multiply, [Decimal("1.23456789"), Decimal("9.87654321")]),
- (context.subtract, [Decimal("1.23456789"), Decimal("9.87654321")]),
- ]
- # try various flags individually, then a whole lot at once
- flagsets = [[Inexact], [Rounded], [Underflow], [Clamped], [Subnormal],
- [Inexact, Rounded, Underflow, Clamped, Subnormal]]
- for fn, args in operations:
- # find answer and flags raised using a clean context
- context.clear_flags()
- ans = fn(*args)
- flags = [k for k, v in context.flags.items() if v]
- for extra_flags in flagsets:
- # set flags, before calling operation
- context.clear_flags()
- for flag in extra_flags:
- context._raise_error(flag)
- new_ans = fn(*args)
- # flags that we expect to be set after the operation
- expected_flags = list(flags)
- for flag in extra_flags:
- if flag not in expected_flags:
- expected_flags.append(flag)
- expected_flags.sort()
- # flags we actually got
- new_flags = [k for k,v in context.flags.items() if v]
- new_flags.sort()
- self.assertEqual(ans, new_ans,
- "operation produces different answers depending on flags set: " +
- "expected %s, got %s." % (ans, new_ans))
- self.assertEqual(new_flags, expected_flags,
- "operation raises different flags depending on flags set: " +
- "expected %s, got %s" % (expected_flags, new_flags))
- def test_main(arith=False, verbose=None, todo_tests=None, debug=None):
- """ Execute the tests.
- Runs all arithmetic tests if arith is True or if the "decimal" resource
- is enabled in regrtest.py
- """
- init()
- global TEST_ALL, DEBUG
- TEST_ALL = arith or is_resource_enabled('decimal')
- DEBUG = debug
- if todo_tests is None:
- test_classes = [
- DecimalExplicitConstructionTest,
- DecimalImplicitConstructionTest,
- DecimalArithmeticOperatorsTest,
- DecimalFormatTest,
- DecimalUseOfContextTest,
- DecimalUsabilityTest,
- DecimalPythonAPItests,
- ContextAPItests,
- DecimalTest,
- WithStatementTest,
- ContextFlags
- ]
- else:
- test_classes = [DecimalTest]
- # Dynamically build custom test definition for each file in the test
- # directory and add the definitions to the DecimalTest class. This
- # procedure insures that new files do not get skipped.
- for filename in os.listdir(directory):
- if '.decTest' not in filename or filename.startswith("."):
- continue
- head, tail = filename.split('.')
- if todo_tests is not None and head not in todo_tests:
- continue
- tester = lambda self, f=filename: self.eval_file(directory + f)
- setattr(DecimalTest, 'test_' + head, tester)
- del filename, head, tail, tester
- try:
- run_unittest(*test_classes)
- if todo_tests is None:
- import decimal as DecimalModule
- run_doctest(DecimalModule, verbose)
- finally:
- setcontext(ORIGINAL_CONTEXT)
- if __name__ == '__main__':
- import optparse
- p = optparse.OptionParser("test_decimal.py [--debug] [{--skip | test1 [test2 [...]]}]")
- p.add_option('--debug', '-d', action='store_true', help='shows the test number and context before each test')
- p.add_option('--skip', '-s', action='store_true', help='skip over 90% of the arithmetic tests')
- (opt, args) = p.parse_args()
- if opt.skip:
- test_main(arith=False, verbose=True)
- elif args:
- test_main(arith=True, verbose=True, todo_tests=args, debug=opt.debug)
- else:
- test_main(arith=True, verbose=True)