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Issue 1242657: list(obj) can swallow KeyboardInterrupt.

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This commit is contained in:
Raymond Hettinger 2009-02-02 22:55:09 +00:00
parent 9f9892648f
commit e8364233ae
6 changed files with 55 additions and 15 deletions
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24
Lib/test/test_iterlen.py
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@ -195,6 +195,29 @@ class TestListReversed(TestInvariantWithoutMutations):
d.extend(range(20))
self.assertEqual(len(it), 0)
## -- Check to make sure exceptions are not suppressed by __length_hint__()
class BadLen(object):
def __iter__(self): return iter(range(10))
def __len__(self):
raise RuntimeError('hello')
class BadLengthHint(object):
def __iter__(self): return iter(range(10))
def __length_hint__(self):
raise RuntimeError('hello')
class TestLengthHintExceptions(unittest.TestCase):
def test_issue1242657(self):
self.assertRaises(RuntimeError, list, BadLen())
self.assertRaises(RuntimeError, list, BadLengthHint())
self.assertRaises(RuntimeError, [].extend, BadLen())
self.assertRaises(RuntimeError, [].extend, BadLengthHint())
b = bytearray(range(10))
self.assertRaises(RuntimeError, b.extend, BadLen())
self.assertRaises(RuntimeError, b.extend, BadLengthHint())
def test_main():
unittests = [
@ -210,6 +233,7 @@ def test_main():
TestSet,
TestList,
TestListReversed,
TestLengthHintExceptions,
]
support.run_unittest(*unittests)