python · JelleZijlstra · Oct 6, 2022 · Sep 6, 2022 · Oct 6, 2022
diff --git a/Lib/test/test_long.py b/Lib/test/test_long.py
@@ -1518,6 +1518,22 @@ def __init__(self, value):
        self.assertEqual(i, 1)
        self.assertEqual(getattr(i, 'foo', 'none'), 'bar')

+        class ValidBytes:
+            def __bytes__(self):
+                return b'\x01'
+        class InvalidBytes:
+            def __bytes__(self):
+                return 'abc'
+        class MissingBytes: ...
+        class RaisingBytes:
+            def __bytes__(self):
+                1 / 0
+
+        self.assertEqual(int.from_bytes(ValidBytes()), 1)
+        self.assertRaises(TypeError, int.from_bytes, InvalidBytes())
+        self.assertRaises(TypeError, int.from_bytes, MissingBytes())
+        self.assertRaises(ZeroDivisionError, int.from_bytes, RaisingBytes())
+
    @support.cpython_only
    def test_from_bytes_small(self):
        # bpo-46361