[Python-checkins] python/dist/src/Lib/test test_types.py,1.41,1.42

2002年12月03日 23:32:28 -0800

Update of /cvsroot/python/python/dist/src/Lib/test
In directory sc8-pr-cvs1:/tmp/cvs-serv25529/Lib/test
Modified Files:
	test_types.py 
Log Message:
Replace BadInternalCall with TypeError. Add a test case. Fix whitespace.
Just van Rossum showed a weird, but clever way for pure python code to 
trigger the BadInternalCall. The C code had assumed that calling a class
constructor would return an instance of that class; however, classes that
abuse __new__ can invalidate that assumption.
Index: test_types.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_types.py,v
retrieving revision 1.41
retrieving revision 1.42
diff -C2 -d -r1.41 -r1.42
*** test_types.py	27 Nov 2002 07:29:33 -0000	1.41
--- test_types.py	4 Dec 2002 07:32:25 -0000	1.42
***************
*** 559,562 ****
--- 559,569 ----
 if type(dictlike().fromkeys('a')) is not dictlike:
 raise TestFailed, 'dictsubclass.fromkeys created wrong type'
+ from UserDict import UserDict
+ class mydict(dict):
+ def __new__(cls, *args, **kwargs):
+ return UserDict(*args, **kwargs)
+ try: mydict.fromkeys('a b c'.split())
+ except TypeError: pass
+ else: raise TestFailed, 'dict.fromkeys() failed to detect non-dict class.'
 # dict.copy()
 d = {1:1, 2:2, 3:3}