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Issue #19145: Fix handling of negative values for a "times" keyword argument to itertools.repeat()>

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(Patch contributed by Vajrasky Kok.)
This commit is contained in:
Raymond Hettinger 2014-06-24 21:36:58 -07:00
parent ca5c7153de
commit 97d3555029
4 changed files with 23 additions and 2 deletions
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13
Lib/test/test_itertools.py
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@ -967,6 +967,12 @@ class TestBasicOps(unittest.TestCase):
self.assertEqual(take(2, copy.deepcopy(c)), list('a' * 2))
self.pickletest(repeat(object='a', times=10))
def test_repeat_with_negative_times(self):
self.assertEqual(repr(repeat('a', -1)), "repeat('a', 0)")
self.assertEqual(repr(repeat('a', -2)), "repeat('a', 0)")
self.assertEqual(repr(repeat('a', times=-1)), "repeat('a', 0)")
self.assertEqual(repr(repeat('a', times=-2)), "repeat('a', 0)")
def test_map(self):
self.assertEqual(list(map(operator.pow, range(3), range(1,7))),
[0**1, 1**2, 2**3])
@ -1741,8 +1747,15 @@ class LengthTransparency(unittest.TestCase):
def test_repeat(self):
self.assertEqual(operator.length_hint(repeat(None, 50)), 50)
self.assertEqual(operator.length_hint(repeat(None, 0)), 0)
self.assertEqual(operator.length_hint(repeat(None), 12), 12)
def test_repeat_with_negative_times(self):
self.assertEqual(operator.length_hint(repeat(None, -1)), 0)
self.assertEqual(operator.length_hint(repeat(None, -2)), 0)
self.assertEqual(operator.length_hint(repeat(None, times=-1)), 0)
self.assertEqual(operator.length_hint(repeat(None, times=-2)), 0)
class RegressionTests(unittest.TestCase):
def test_sf_793826(self):