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#14089: increase coverage of the fractions module. Patch by Oleg Plakhotnyuk.

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This commit is contained in:
Ezio Melotti 2012-02-29 14:04:02 +02:00
parent d9de93eb67
commit ca666245e7
1 changed files with 19 additions and 1 deletions
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20
Lib/test/test_fractions.py
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@ -6,6 +6,7 @@ import math
import numbers
import operator
import fractions
import sys
import unittest
from copy import copy, deepcopy
from cPickle import dumps, loads
@ -88,6 +89,9 @@ class DummyRational(object):
__hash__ = None
class DummyFraction(fractions.Fraction):
"""Dummy Fraction subclass for copy and deepcopy testing."""
class GcdTest(unittest.TestCase):
def testMisc(self):
@ -301,11 +305,15 @@ class FractionTest(unittest.TestCase):
self.assertEqual(F(201, 200).limit_denominator(100), F(1))
self.assertEqual(F(201, 200).limit_denominator(101), F(102, 101))
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):
self.assertTypedEquals(-1, math.trunc(F(-11, 10)))
self.assertTypedEquals(-1, int(F(-11, 10)))
self.assertTypedEquals(1, math.trunc(F(11, 10)))
self.assertEqual(False, bool(F(0, 1)))
self.assertEqual(True, bool(F(3, 2)))
self.assertTypedEquals(0.1, float(F(1, 10)))
@ -330,6 +338,7 @@ class FractionTest(unittest.TestCase):
self.assertEqual(F(8, 27), 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.assertEqual(F(1, 1), +F(1, 1))
# Will return 1j in 3.0:
self.assertRaises(ValueError, pow, F(-1), F(1, 2))
@ -394,6 +403,10 @@ class FractionTest(unittest.TestCase):
TypeError,
"unsupported operand type(s) for +: 'Fraction' and 'Decimal'",
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))
self.assertNotEqual(F(5, 2), Decimal('2.5'))
def testComparisons(self):
@ -571,9 +584,14 @@ class FractionTest(unittest.TestCase):
def test_copy_deepcopy_pickle(self):
r = F(13, 7)
dr = DummyFraction(13, 7)
self.assertEqual(r, loads(dumps(r)))
self.assertEqual(id(r), id(copy(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):
# Issue 4998