| # 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 with_statement |
| |
| 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 random |
| try: |
| import threading |
| except ImportError: |
| threading = None |
| |
| # Useful Test Constant |
| Signals = tuple(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() |
| DefaultContext.prec = 9 |
| DefaultContext.rounding = ROUND_HALF_EVEN |
| DefaultContext.traps = dict.fromkeys(Signals, 0) |
| setcontext(DefaultContext) |
| |
| 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 ( |
| len(v._int) > DEC_MAX_MATH or |
| 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() |
| for key in DefaultContext.traps.keys(): |
| DefaultContext.traps[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.traps.keys(): |
| DefaultContext.traps[key] = 0 |
| return |
| |
| def eval_file(self, file): |
| global skip_expected |
| if skip_expected: |
| raise TestSkipped |
| return |
| for line in open(file): |
| line = line.replace('\r\n', '').replace('\n', '') |
| #print line |
| try: |
| t = self.eval_line(line) |
| except DecimalException as 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 = (x.strip().lower() for x in 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, end=" ") |
| 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 as 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 as 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 as 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(key=repr) |
| theirexceptions.sort(key=repr) |
| |
| 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') |
| |
| 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') |
| |
| |
| 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__'), |
| ('/', '__truediv__', '__rtruediv__'), |
| ('%', '__mod__', '__rmod__'), |
| ('//', '__floordiv__', '__rfloordiv__'), |
| ('**', '__pow__', '__rpow__') |
| ] |
| |
| 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 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 |
| |
| |
| # 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.''' |
| |
| 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.assertEqual(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.assertEqual(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 = list(map(Decimal, range(100))) |
| b = a[:] |
| random.shuffle(a) |
| a.sort() |
| self.assertEqual(a, b) |
| |
| 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 |
| |
| 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(int(d1), 66) |
| self.assertEqual(int(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("__divmod__", True) |
| checkSameDec("__cmp__", True) |
| checkSameDec("__float__") |
| checkSameDec("__floordiv__", True) |
| checkSameDec("__hash__") |
| checkSameDec("__int__") |
| checkSameDec("__mod__", True) |
| checkSameDec("__mul__", True) |
| checkSameDec("__neg__") |
| checkSameDec("__bool__") |
| checkSameDec("__pos__") |
| checkSameDec("__pow__", True) |
| checkSameDec("__radd__", 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) |
| |
| |
| 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_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) |
| |
| 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(key=id) |
| |
| # flags we actually got |
| new_flags = [k for k,v in context.flags.items() if v] |
| new_flags.sort(key=id) |
| |
| 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, |
| 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) |