def test_fom_buffer(self):
a = array.array("i", range(16))
x = (c_int * 16).from_buffer(a)
y = X.from_buffer(a)
self.assertEqual(y.c_int, a[0])
self.assertFalse(y.init_called)
self.assertEqual(x[:], a.tolist())
a[0], a[-1] = 200, -200
self.assertEqual(x[:], a.tolist())
self.assertIn(a, x._objects.values())
self.assertRaises(ValueError,
c_int.from_buffer, a, -1)
expected = x[:]
del a; gc.collect(); gc.collect(); gc.collect()
self.assertEqual(x[:], expected)
self.assertRaises(TypeError,
(c_char * 16).from_buffer, "a" * 16)
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