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Issue #22486: Added the math.gcd() function. The fractions.gcd() function now is

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deprecated.  Based on patch by Mark Dickinson.
This commit is contained in:
Serhiy Storchaka 2015-05-13 00:19:51 +03:00
parent f0eeedf0d8
commit 48e47aaa28
9 changed files with 342 additions and 13 deletions
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33
Lib/test/test_fractions.py
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@ -8,6 +8,7 @@ import operator
import fractions
import sys
import unittest
import warnings
from copy import copy, deepcopy
from pickle import dumps, loads
F = fractions.Fraction
@ -49,7 +50,7 @@ class DummyRational(object):
"""Test comparison of Fraction with a naive rational implementation."""
def __init__(self, num, den):
g = gcd(num, den)
g = math.gcd(num, den)
self.num = num // g
self.den = den // g
@ -83,16 +84,26 @@ class DummyFraction(fractions.Fraction):
class GcdTest(unittest.TestCase):
def testMisc(self):
self.assertEqual(0, gcd(0, 0))
self.assertEqual(1, gcd(1, 0))
self.assertEqual(-1, gcd(-1, 0))
self.assertEqual(1, gcd(0, 1))
self.assertEqual(-1, gcd(0, -1))
self.assertEqual(1, gcd(7, 1))
self.assertEqual(-1, gcd(7, -1))
self.assertEqual(1, gcd(-23, 15))
self.assertEqual(12, gcd(120, 84))
self.assertEqual(-12, gcd(84, -120))
# fractions.gcd() is deprecated
with self.assertWarnsRegex(DeprecationWarning, r'fractions\.gcd'):
gcd(1, 1)
with warnings.catch_warnings():
warnings.filterwarnings('ignore', r'fractions\.gcd',
DeprecationWarning)
self.assertEqual(0, gcd(0, 0))
self.assertEqual(1, gcd(1, 0))
self.assertEqual(-1, gcd(-1, 0))
self.assertEqual(1, gcd(0, 1))
self.assertEqual(-1, gcd(0, -1))
self.assertEqual(1, gcd(7, 1))
self.assertEqual(-1, gcd(7, -1))
self.assertEqual(1, gcd(-23, 15))
self.assertEqual(12, gcd(120, 84))
self.assertEqual(-12, gcd(84, -120))
self.assertEqual(gcd(120.0, 84), 12.0)
self.assertEqual(gcd(120, 84.0), 12.0)
self.assertEqual(gcd(F(120), F(84)), F(12))
self.assertEqual(gcd(F(120, 77), F(84, 55)), F(12, 385))
def _components(r):