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

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 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 cPickle import dumps, loads from cPickle import dumps, loads
@ -88,6 +89,9 @@ class DummyRational(object):
__hash__ = None __hash__ = None
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):
@ -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(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, int(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(False, bool(F(0, 1)))
self.assertEqual(True, bool(F(3, 2))) self.assertEqual(True, bool(F(3, 2)))
self.assertTypedEquals(0.1, float(F(1, 10))) 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(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))
# Will return 1j in 3.0: # Will return 1j in 3.0:
self.assertRaises(ValueError, pow, F(-1), F(1, 2)) self.assertRaises(ValueError, pow, F(-1), F(1, 2))
@ -394,6 +403,10 @@ 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))
self.assertNotEqual(F(5, 2), Decimal('2.5')) self.assertNotEqual(F(5, 2), Decimal('2.5'))
def testComparisons(self): def testComparisons(self):
@ -571,9 +584,14 @@ 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