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#14089: merge with 3.2.

This commit is contained in:
Ezio Melotti 2012-02-29 14:06:56 +02:00
parent 6ea00ef25a 682d37423d
commit aba0b13f0a
1 changed files with 22 additions and 0 deletions
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22
Lib/test/test_fractions.py
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@ -6,6 +6,7 @@ import math
import numbers import numbers
import operator import operator
import fractions import fractions
import sys
import unittest import unittest
from copy import copy, deepcopy from copy import copy, deepcopy
from pickle import dumps, loads from pickle import dumps, loads
@ -76,6 +77,9 @@ class DummyRational(object):
def __float__(self): def __float__(self):
assert False, "__float__ should not be invoked" assert False, "__float__ should not be invoked"
class DummyFraction(fractions.Fraction):
"""Dummy Fraction subclass for copy and deepcopy testing."""
class GcdTest(unittest.TestCase): class GcdTest(unittest.TestCase):
def testMisc(self): def testMisc(self):
@ -286,9 +290,14 @@ class FractionTest(unittest.TestCase):
self.assertEqual(F(201, 200).limit_denominator(100), F(1)) self.assertEqual(F(201, 200).limit_denominator(100), F(1))
self.assertEqual(F(201, 200).limit_denominator(101), F(102, 101)) self.assertEqual(F(201, 200).limit_denominator(101), F(102, 101))
self.assertEqual(F(0).limit_denominator(10000), F(0)) self.assertEqual(F(0).limit_denominator(10000), F(0))
for i in (0, -1):
self.assertRaisesMessage(
ValueError, "max_denominator should be at least 1",
F(1).limit_denominator, i)
def testConversions(self): def testConversions(self):
self.assertTypedEquals(-1, math.trunc(F(-11, 10))) self.assertTypedEquals(-1, math.trunc(F(-11, 10)))
self.assertTypedEquals(1, math.trunc(F(11, 10)))
self.assertTypedEquals(-2, math.floor(F(-11, 10))) self.assertTypedEquals(-2, math.floor(F(-11, 10)))
self.assertTypedEquals(-1, math.ceil(F(-11, 10))) self.assertTypedEquals(-1, math.ceil(F(-11, 10)))
self.assertTypedEquals(-1, math.ceil(F(-10, 10))) self.assertTypedEquals(-1, math.ceil(F(-10, 10)))
@ -329,6 +338,7 @@ class FractionTest(unittest.TestCase):
self.assertEqual(F(8, 27), F(2, 3) ** F(3)) self.assertEqual(F(8, 27), F(2, 3) ** F(3))
self.assertEqual(F(27, 8), F(2, 3) ** F(-3)) self.assertEqual(F(27, 8), F(2, 3) ** F(-3))
self.assertTypedEquals(2.0, F(4) ** F(1, 2)) self.assertTypedEquals(2.0, F(4) ** F(1, 2))
self.assertEqual(F(1, 1), +F(1, 1))
z = pow(F(-1), F(1, 2)) z = pow(F(-1), F(1, 2))
self.assertAlmostEqual(z.real, 0) self.assertAlmostEqual(z.real, 0)
self.assertEqual(z.imag, 1) self.assertEqual(z.imag, 1)
@ -395,6 +405,10 @@ class FractionTest(unittest.TestCase):
TypeError, TypeError,
"unsupported operand type(s) for +: 'Fraction' and 'Decimal'", "unsupported operand type(s) for +: 'Fraction' and 'Decimal'",
operator.add, F(3,11), Decimal('3.1415926')) operator.add, F(3,11), Decimal('3.1415926'))
self.assertRaisesMessage(
TypeError,
"unsupported operand type(s) for +: 'Decimal' and 'Fraction'",
operator.add, Decimal('3.1415926'), F(3,11))
def testComparisons(self): def testComparisons(self):
self.assertTrue(F(1, 2) < F(2, 3)) self.assertTrue(F(1, 2) < F(2, 3))
@ -538,9 +552,12 @@ class FractionTest(unittest.TestCase):
self.assertEqual("7", str(F(7, 1))) self.assertEqual("7", str(F(7, 1)))
def testHash(self): def testHash(self):
hmod = sys.hash_info.modulus
hinf = sys.hash_info.inf
self.assertEqual(hash(2.5), hash(F(5, 2))) self.assertEqual(hash(2.5), hash(F(5, 2)))
self.assertEqual(hash(10**50), hash(F(10**50))) self.assertEqual(hash(10**50), hash(F(10**50)))
self.assertNotEqual(hash(float(10**23)), hash(F(10**23))) self.assertNotEqual(hash(float(10**23)), hash(F(10**23)))
self.assertEqual(hinf, hash(F(1, hmod)))
# Check that __hash__ produces the same value as hash(), for # Check that __hash__ produces the same value as hash(), for
# consistency with int and Decimal. (See issue #10356.) # consistency with int and Decimal. (See issue #10356.)
self.assertEqual(hash(F(-1)), F(-1).__hash__()) self.assertEqual(hash(F(-1)), F(-1).__hash__())
@ -574,9 +591,14 @@ class FractionTest(unittest.TestCase):
def test_copy_deepcopy_pickle(self): def test_copy_deepcopy_pickle(self):
r = F(13, 7) r = F(13, 7)
dr = DummyFraction(13, 7)
self.assertEqual(r, loads(dumps(r))) self.assertEqual(r, loads(dumps(r)))
self.assertEqual(id(r), id(copy(r))) self.assertEqual(id(r), id(copy(r)))
self.assertEqual(id(r), id(deepcopy(r))) self.assertEqual(id(r), id(deepcopy(r)))
self.assertNotEqual(id(dr), id(copy(dr)))
self.assertNotEqual(id(dr), id(deepcopy(dr)))
self.assertTypedEquals(dr, copy(dr))
self.assertTypedEquals(dr, deepcopy(dr))
def test_slots(self): def test_slots(self):
# Issue 4998 # Issue 4998