diff options
Diffstat (limited to 'Lib/test/test_descr.py')
| -rw-r--r-- | Lib/test/test_descr.py | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py index 09eef8c..e37a984 100644 --- a/Lib/test/test_descr.py +++ b/Lib/test/test_descr.py @@ -1614,10 +1614,14 @@ order (MRO) for bases """ with self.assertRaises(TypeError) as cm: spam_cm(list) - self.assertEqual( - str(cm.exception), + expected_errmsg = ( "descriptor 'classmeth' requires a subtype of 'xxsubtype.spamlist' " "but received 'list'") + self.assertEqual(str(cm.exception), expected_errmsg) + + with self.assertRaises(TypeError) as cm: + spam_cm.__get__(None, list) + self.assertEqual(str(cm.exception), expected_errmsg) def test_staticmethods(self): # Testing static methods... @@ -1952,6 +1956,29 @@ order (MRO) for bases """ self.assertEqual(E().foo.__func__, C.foo) # i.e., unbound self.assertTrue(repr(C.foo.__get__(C(1))).startswith("<bound method ")) + @support.impl_detail("testing error message from implementation") + def test_methods_in_c(self): + # This test checks error messages in builtin method descriptor. + # It is allowed that other Python implementations use + # different error messages. + set_add = set.add + + expected_errmsg = "descriptor 'add' of 'set' object needs an argument" + + with self.assertRaises(TypeError) as cm: + set_add() + self.assertEqual(cm.exception.args[0], expected_errmsg) + + expected_errmsg = "descriptor 'add' for 'set' objects doesn't apply to a 'int' object" + + with self.assertRaises(TypeError) as cm: + set_add(0) + self.assertEqual(cm.exception.args[0], expected_errmsg) + + with self.assertRaises(TypeError) as cm: + set_add.__get__(0) + self.assertEqual(cm.exception.args[0], expected_errmsg) + def test_special_method_lookup(self): # The lookup of special methods bypasses __getattr__ and # __getattribute__, but they still can be descriptors. |