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Issue 4509: Do not modify an array if we know the change would result

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in a failure due to exported buffers.
This commit is contained in:
Alexandre Vassalotti 2009-07-05 05:38:18 +00:00
parent 200cfd00ab
commit 7e4f3215db
2 changed files with 24 additions and 0 deletions
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16
Lib/test/test_array.py
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@ -749,9 +749,25 @@ class BaseTest(unittest.TestCase):
ArraySubclassWithKwargs('b', newarg=1)
def test_create_from_bytes(self):
# XXX This test probably needs to be moved in a subclass or
# generalized to use self.typecode.
a = array.array('H', b"1234")
self.assertEqual(len(a) * a.itemsize, 4)
def test_memoryview_no_resize(self):
# Test for issue 4509.
a = array.array(self.typecode, self.example)
m = memoryview(a)
expected = m.tobytes()
self.assertRaises(BufferError, a.pop, 0)
self.assertEqual(m.tobytes(), expected)
self.assertRaises(BufferError, a.remove, a[0])
self.assertEqual(m.tobytes(), expected)
self.assertRaises(BufferError, a.__setitem__, slice(0, 0), a)
self.assertEqual(m.tobytes(), expected)
self.assertRaises(BufferError, a.__delitem__, slice(0, len(a)))
self.assertEqual(m.tobytes(), expected)
class StringTest(BaseTest):