Issue #25659: Change assert to TypeError in from_buffer/_copy()

Based on suggestion by Eryk Sun.

1 files changed, 8 insertions, 0 deletions

diff --git a/Lib/ctypes/test/test_frombuffer.py b/Lib/ctypes/test/test_frombuffer.py
index 29c5a19328..7ab38f1b03 100644
--- a/Lib/ctypes/test/test_frombuffer.py
+++ b/Lib/ctypes/test/test_frombuffer.py
@@ -120,5 +120,13 @@ class Test(unittest.TestCase):
         with self.assertRaises(ValueError):
             (c_int * 1).from_buffer_copy(a, 16 * sizeof(c_int))
 
+    def test_abstract(self):
+        self.assertRaises(TypeError, Array.from_buffer, bytearray(10))
+        self.assertRaises(TypeError, Structure.from_buffer, bytearray(10))
+        self.assertRaises(TypeError, Union.from_buffer, bytearray(10))
+        self.assertRaises(TypeError, Array.from_buffer_copy, b"123")
+        self.assertRaises(TypeError, Structure.from_buffer_copy, b"123")
+        self.assertRaises(TypeError, Union.from_buffer_copy, b"123")
+
 if __name__ == '__main__':
     unittest.main()