[Python-checkins] CVS: python/dist/src/Lib/test test_descr.py,1.109,1.110

[Guido van Rossum]

Update of /cvsroot/python/python/dist/src/Lib/test
In directory usw-pr-cvs1:/tmp/cvs-serv5060/Lib/test

Modified Files:
	test_descr.py 
Log Message:
Fix SF bug #489581: __slots__ leak.

It was easier than I thought, assuming that no other things contribute
to the instance size besides slots -- a pretty good bet.  With a test
suite, no less!



Index: test_descr.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_descr.py,v
retrieving revision 1.109
retrieving revision 1.110
diff -C2 -d -r1.109 -r1.110
*** test_descr.py	2001/12/05 19:46:42	1.109
--- test_descr.py	2001/12/05 22:45:48	1.110
***************
*** 1001,1004 ****
--- 1001,1038 ----
      vereq(x.c, 3)
  
+     # Test leaks
+     class Counted(object):
+         counter = 0    # counts the number of instances alive
+         def __init__(self):
+             Counted.counter += 1
+         def __del__(self):
+             Counted.counter -= 1
+     class C(object):
+         __slots__ = ['a', 'b', 'c']
+     x = C()
+     x.a = Counted()
+     x.b = Counted()
+     x.c = Counted()
+     vereq(Counted.counter, 3)
+     del x
+     vereq(Counted.counter, 0)
+     class D(C):
+         pass
+     x = D()
+     x.a = Counted()
+     x.z = Counted()
+     vereq(Counted.counter, 2)
+     del x
+     vereq(Counted.counter, 0)
+     class E(D):
+         __slots__ = ['e']
+     x = E()
+     x.a = Counted()
+     x.z = Counted()
+     x.e = Counted()
+     vereq(Counted.counter, 3)
+     del x
+     vereq(Counted.counter, 0)
+ 
  def dynamics():
      if verbose: print "Testing class attribute propagation..."