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Issue #13201: equality for range objects is now based on equality of the underlying sequences. Thanks Sven Marnach for the patch.

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This commit is contained in:
Mark Dickinson 2011-10-23 19:53:01 +01:00
parent a2a2e480f3
commit 36645681c8
7 changed files with 209 additions and 4 deletions
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52
Lib/test/test_range.py
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@ -507,6 +507,58 @@ class RangeTest(unittest.TestCase):
for k in values - {0}:
r[i:j:k]
def test_comparison(self):
test_ranges = [range(0), range(0, -1), range(1, 1, 3),
range(1), range(5, 6), range(5, 6, 2),
range(5, 7, 2), range(2), range(0, 4, 2),
range(0, 5, 2), range(0, 6, 2)]
test_tuples = list(map(tuple, test_ranges))
# Check that equality of ranges matches equality of the corresponding
# tuples for each pair from the test lists above.
ranges_eq = [a == b for a in test_ranges for b in test_ranges]
tuples_eq = [a == b for a in test_tuples for b in test_tuples]
self.assertEqual(ranges_eq, tuples_eq)
# Check that != correctly gives the logical negation of ==
ranges_ne = [a != b for a in test_ranges for b in test_ranges]
self.assertEqual(ranges_ne, [not x for x in ranges_eq])
# Equal ranges should have equal hashes.
for a in test_ranges:
for b in test_ranges:
if a == b:
self.assertEqual(hash(a), hash(b))
# Ranges are unequal to other types (even sequence types)
self.assertIs(range(0) == (), False)
self.assertIs(() == range(0), False)
self.assertIs(range(2) == [0, 1], False)
# Huge integers aren't a problem.
self.assertEqual(range(0, 2**100 - 1, 2),
range(0, 2**100, 2))
self.assertEqual(hash(range(0, 2**100 - 1, 2)),
hash(range(0, 2**100, 2)))
self.assertNotEqual(range(0, 2**100, 2),
range(0, 2**100 + 1, 2))
self.assertEqual(range(2**200, 2**201 - 2**99, 2**100),
range(2**200, 2**201, 2**100))
self.assertEqual(hash(range(2**200, 2**201 - 2**99, 2**100)),
hash(range(2**200, 2**201, 2**100)))
self.assertNotEqual(range(2**200, 2**201, 2**100),
range(2**200, 2**201 + 1, 2**100))
# Order comparisons are not implemented for ranges.
with self.assertRaises(TypeError):
range(0) < range(0)
with self.assertRaises(TypeError):
range(0) > range(0)
with self.assertRaises(TypeError):
range(0) <= range(0)
with self.assertRaises(TypeError):
range(0) >= range(0)
def test_main():
test.support.run_unittest(RangeTest)