[Zope-Checkins] SVN: Zope/trunk/lib/python/ExtensionClass/tests.py Added basic cyclic GC test. Note that this test would fail in

[Jim Fulton]

Log message for revision 30246:
  Added basic cyclic GC test.  Note that this test would fail in
  Zope 2.7 and earlier.
  

Changed:
  U   Zope/trunk/lib/python/ExtensionClass/tests.py

-=-
Modified: Zope/trunk/lib/python/ExtensionClass/tests.py
===================================================================
--- Zope/trunk/lib/python/ExtensionClass/tests.py	2005-05-05 09:50:09 UTC (rev 30245)
+++ Zope/trunk/lib/python/ExtensionClass/tests.py	2005-05-05 10:09:20 UTC (rev 30246)
@@ -807,6 +807,34 @@
 
     """
 
+def test_Basic_gc():
+    """Test to make sure that EC instances participate in GC
+
+    >>> from ExtensionClass import Base
+    >>> import gc
+    >>> class C1(Base):
+    ...     pass
+    ... 
+    >>> class C2(Base):
+    ...     def __del__(self):
+    ...         print 'removed'
+    ... 
+    >>> a=C1()
+    >>> a.b = C1()
+    >>> a.b.a = a
+    >>> a.b.c = C2()
+    >>> thresholds = gc.get_threshold()
+    >>> gc.set_threshold(0)
+    >>> ignore = gc.collect()
+    >>> del a
+    >>> ignored = gc.collect()
+    removed
+    >>> ignored > 0
+    True
+    >>> gc.set_threshold(*thresholds)
+
+"""
+
 from zope.testing.doctest import DocTestSuite
 import unittest