diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_descr.py | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py index 5bd837e..766c399 100644 --- a/Lib/test/test_descr.py +++ b/Lib/test/test_descr.py @@ -2005,6 +2005,33 @@ def descrdoc(): check(file.closed, "flag set if the file is closed") # getset descriptor check(file.name, "file name") # member descriptor +def setclass(): + if verbose: print "Testing __class__ assignment..." + class C(object): pass + class D(object): pass + class E(object): pass + class F(D, E): pass + for cls in C, D, E, F: + for cls2 in C, D, E, F: + x = cls() + x.__class__ = cls2 + verify(x.__class__ is cls2) + x.__class__ = cls + verify(x.__class__ is cls) + def cant(x, C): + try: + x.__class__ = C + except TypeError: + pass + else: + raise TestFailed, "shouldn't allow %r.__class__ = %r" % (x, C) + cant(C(), list) + cant(list(), C) + cant(C(), 1) + cant(C(), object) + cant(object(), list) + cant(list(), object) + def test_main(): lists() @@ -2047,6 +2074,7 @@ def test_main(): rich_comparisons() coercions() descrdoc() + setclass() if verbose: print "All OK" if __name__ == "__main__": |