Issue #14181: Test creating memoryviews from a static exporter with both
view.obj==NULL and view.obj==base.
diff --git a/Lib/test/test_buffer.py b/Lib/test/test_buffer.py
index 8a8d55d..533338e 100644
--- a/Lib/test/test_buffer.py
+++ b/Lib/test/test_buffer.py
@@ -3515,6 +3515,100 @@
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)