test_frombuffer.py 文件源码

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)