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Code Issues Projects Releases Packages Wiki Activity Actions 9

Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because

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it's useful outside of rational numbers.

This is my first C code that had to do anything significant. Please be more
careful when looking over it.
This commit is contained in:
Jeffrey Yasskin 2008-01-27 23:08:46 +00:00
parent 56eadd9d0d
commit 3ea7b41b58
3 changed files with 180 additions and 56 deletions
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21
Lib/test/test_builtin.py
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@ -5,7 +5,7 @@ from test.test_support import fcmp, have_unicode, TESTFN, unlink, \
run_unittest, run_with_locale
from operator import neg
import sys, warnings, cStringIO, random, UserDict
import sys, warnings, cStringIO, random, rational, UserDict
warnings.filterwarnings("ignore", "hex../oct.. of negative int",
FutureWarning, __name__)
warnings.filterwarnings("ignore", "integer argument expected",
@ -688,6 +688,25 @@ class BuiltinTest(unittest.TestCase):
self.assertAlmostEqual(float(Foo3(21)), 42.)
self.assertRaises(TypeError, float, Foo4(42))
def test_floatasratio(self):
R = rational.Rational
self.assertEqual(R(0, 1),
R(*float(0.0).as_integer_ratio()))
self.assertEqual(R(5, 2),
R(*float(2.5).as_integer_ratio()))
self.assertEqual(R(1, 2),
R(*float(0.5).as_integer_ratio()))
self.assertEqual(R(4728779608739021, 2251799813685248),
R(*float(2.1).as_integer_ratio()))
self.assertEqual(R(-4728779608739021, 2251799813685248),
R(*float(-2.1).as_integer_ratio()))
self.assertEqual(R(-2100, 1),
R(*float(-2100.0).as_integer_ratio()))
self.assertRaises(OverflowError, float('inf').as_integer_ratio)
self.assertRaises(OverflowError, float('-inf').as_integer_ratio)
self.assertRaises(ValueError, float('nan').as_integer_ratio)
def test_getattr(self):
import sys
self.assert_(getattr(sys, 'stdout') is sys.stdout)