diff options
Diffstat (limited to 'Lib/test/test_builtin.py')
| -rw-r--r-- | Lib/test/test_builtin.py | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py index e6ded81..92c1d00 100644 --- a/Lib/test/test_builtin.py +++ b/Lib/test/test_builtin.py @@ -5,7 +5,7 @@ from test.test_support import fcmp, TESTFN, unlink, run_unittest, \ run_with_locale from operator import neg -import sys, warnings, random, UserDict, io +import sys, warnings, random, UserDict, io, rational warnings.filterwarnings("ignore", "hex../oct.. of negative int", FutureWarning, __name__) warnings.filterwarnings("ignore", "integer argument expected", @@ -592,6 +592,25 @@ class BuiltinTest(unittest.TestCase): # make sure we can take a subclass of str as a format spec self.assertEqual(format(0, C('10')), ' 0') + 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) |