diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_coercion.py | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/Lib/test/test_coercion.py b/Lib/test/test_coercion.py index 4356817302..d704e4b734 100644 --- a/Lib/test/test_coercion.py +++ b/Lib/test/test_coercion.py @@ -2,7 +2,7 @@ import copy import sys import warnings import unittest -from test.test_support import run_unittest +from test.test_support import run_unittest, TestFailed # Fake a number that implements numeric methods through __coerce__ class CoerceNumber: @@ -318,6 +318,24 @@ class CoercionTest(unittest.TestCase): return 0 self.assertEquals(cmp(ClassicWackyComparer(), evil_coercer), 0) + def test_infinite_rec_classic_classes(self): + # if __coerce__() returns its arguments reversed it causes an infinite + # recursion for classic classes. + class Tester: + def __coerce__(self, other): + return other, self + + exc = TestFailed("__coerce__() returning its arguments reverse " + "should raise RuntimeError") + try: + Tester() + 1 + except (RuntimeError, TypeError): + return + except: + raise exc + else: + raise exc + def test_main(): warnings.filterwarnings("ignore", r'complex divmod\(\), // and % are deprecated', |