Update of /cvsroot/python/python/dist/src/Lib/test In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv19812/Lib/test Modified Files: test_funcattrs.py Log Message: Wrote down the invariants of some common objects whose structure is exposed in header files. Fixed a few comments in these headers. As we might have expected, writing down invariants systematically exposed a (minor) bug. In this case, function objects have a writeable func_code attribute, which could be set to code objects with the wrong number of free variables. Calling the resulting function segfaulted the interpreter. Added a corresponding test. Index: test_funcattrs.py =================================================================== RCS file: /cvsroot/python/python/dist/src/Lib/test/test_funcattrs.py,v retrieving revision 1.15 retrieving revision 1.16 diff -u -d -r1.15 -r1.16 --- test_funcattrs.py 13 Aug 2004 03:57:22 -0000 1.15 +++ test_funcattrs.py 28 Oct 2004 16:31:59 -0000 1.16 @@ -218,11 +218,11 @@ # Test all predefined function attributes systematically -def cantset(obj, name, value): +def cantset(obj, name, value, exception=(AttributeError, TypeError)): verify(hasattr(obj, name)) # Otherwise it's probably a typo try: setattr(obj, name, value) - except (AttributeError, TypeError): + except exception: pass else: raise TestFailed, "shouldn't be able to set %s to %r" % (name, value) @@ -279,11 +279,20 @@ def test_func_code(): + a = b = 24 def f(): pass def g(): print 12 + def f1(): print a + def g1(): print b + def f2(): print a, b verify(type(f.func_code) is types.CodeType) f.func_code = g.func_code cantset(f, "func_code", None) + # can't change the number of free vars + cantset(f, "func_code", f1.func_code, exception=ValueError) + cantset(f1, "func_code", f.func_code, exception=ValueError) + cantset(f1, "func_code", f2.func_code, exception=ValueError) + f1.func_code = g1.func_code def test_func_defaults(): def f(a, b): return (a, b)