diff options
Diffstat (limited to 'Lib/test/test_fractions.py')
| -rw-r--r-- | Lib/test/test_fractions.py | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Lib/test/test_fractions.py b/Lib/test/test_fractions.py index 26e132f..084ae0c 100644 --- a/Lib/test/test_fractions.py +++ b/Lib/test/test_fractions.py @@ -6,6 +6,7 @@ import math import numbers import operator import fractions +import sys import unittest from copy import copy, deepcopy from pickle import dumps, loads @@ -76,6 +77,9 @@ class DummyRational(object): def __float__(self): assert False, "__float__ should not be invoked" +class DummyFraction(fractions.Fraction): + """Dummy Fraction subclass for copy and deepcopy testing.""" + class GcdTest(unittest.TestCase): def testMisc(self): @@ -286,9 +290,14 @@ 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, math.trunc(F(11, 10))) self.assertTypedEquals(-2, math.floor(F(-11, 10))) self.assertTypedEquals(-1, math.ceil(F(-11, 10))) self.assertTypedEquals(-1, math.ceil(F(-10, 10))) @@ -329,6 +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)) z = pow(F(-1), F(1, 2)) self.assertAlmostEqual(z.real, 0) self.assertEqual(z.imag, 1) @@ -395,6 +405,10 @@ 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)) def testComparisons(self): self.assertTrue(F(1, 2) < F(2, 3)) @@ -538,9 +552,12 @@ class FractionTest(unittest.TestCase): self.assertEqual("7", str(F(7, 1))) def testHash(self): + hmod = sys.hash_info.modulus + hinf = sys.hash_info.inf self.assertEqual(hash(2.5), hash(F(5, 2))) self.assertEqual(hash(10**50), hash(F(10**50))) self.assertNotEqual(hash(float(10**23)), hash(F(10**23))) + self.assertEqual(hinf, hash(F(1, hmod))) # Check that __hash__ produces the same value as hash(), for # consistency with int and Decimal. (See issue #10356.) self.assertEqual(hash(F(-1)), F(-1).__hash__()) @@ -574,9 +591,14 @@ 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 |