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Issue #14181: Test creating memoryviews from a static exporter with both

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view.obj==NULL and view.obj==base.
This commit is contained in:
Stefan Krah 2012-03-05 14:37:34 +01:00
parent 8d217c6a71
commit bf6c7eca43
2 changed files with 219 additions and 1 deletions
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94
Lib/test/test_buffer.py
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@ -3515,6 +3515,100 @@ class TestBufferProtocol(unittest.TestCase):
del y, z
self.assertEqual(m[1:3], x[1:3])
def test_memoryview_from_static_exporter(self):
fmt = 'B'
lst = [0,1,2,3,4,5,6,7,8,9,10,11]
# exceptions
self.assertRaises(TypeError, staticarray, 1, 2, 3)
# view.obj==x
x = staticarray()
y = memoryview(x)
self.verify(y, obj=x,
itemsize=1, fmt=fmt, readonly=1,
ndim=1, shape=[12], strides=[1],
lst=lst)
for i in range(12):
self.assertEqual(y[i], i)
del x
del y
x = staticarray()
y = memoryview(x)
del y
del x
x = staticarray()
y = ndarray(x, getbuf=PyBUF_FULL_RO)
z = ndarray(y, getbuf=PyBUF_FULL_RO)
m = memoryview(z)
self.assertIs(y.obj, x)
self.assertIs(m.obj, z)
self.verify(m, obj=z,
itemsize=1, fmt=fmt, readonly=1,
ndim=1, shape=[12], strides=[1],
lst=lst)
del x, y, z, m
x = staticarray()
y = ndarray(x, getbuf=PyBUF_FULL_RO, flags=ND_REDIRECT)
z = ndarray(y, getbuf=PyBUF_FULL_RO, flags=ND_REDIRECT)
m = memoryview(z)
self.assertIs(y.obj, x)
self.assertIs(z.obj, x)
self.assertIs(m.obj, x)
self.verify(m, obj=x,
itemsize=1, fmt=fmt, readonly=1,
ndim=1, shape=[12], strides=[1],
lst=lst)
del x, y, z, m
# view.obj==NULL
x = staticarray(legacy_mode=True)
y = memoryview(x)
self.verify(y, obj=None,
itemsize=1, fmt=fmt, readonly=1,
ndim=1, shape=[12], strides=[1],
lst=lst)
for i in range(12):
self.assertEqual(y[i], i)
del x
del y
x = staticarray(legacy_mode=True)
y = memoryview(x)
del y
del x
x = staticarray(legacy_mode=True)
y = ndarray(x, getbuf=PyBUF_FULL_RO)
z = ndarray(y, getbuf=PyBUF_FULL_RO)
m = memoryview(z)
self.assertIs(y.obj, None)
self.assertIs(m.obj, z)
self.verify(m, obj=z,
itemsize=1, fmt=fmt, readonly=1,
ndim=1, shape=[12], strides=[1],
lst=lst)
del x, y, z, m
x = staticarray(legacy_mode=True)
y = ndarray(x, getbuf=PyBUF_FULL_RO, flags=ND_REDIRECT)
z = ndarray(y, getbuf=PyBUF_FULL_RO, flags=ND_REDIRECT)
m = memoryview(z)
# Clearly setting view.obj==NULL is inferior, since it
# messes up the redirection chain:
self.assertIs(y.obj, None)
self.assertIs(z.obj, y)
self.assertIs(m.obj, y)
self.verify(m, obj=y,
itemsize=1, fmt=fmt, readonly=1,
ndim=1, shape=[12], strides=[1],
lst=lst)
del x, y, z, m
def test_issue_7385(self):
x = ndarray([1,2,3], shape=[3], flags=ND_GETBUF_FAIL)
self.assertRaises(BufferError, memoryview, x)