From 8805e66ec8c67a8ec2ce6e1e6e6802ce2252925b Mon Sep 17 00:00:00 2001
From: Tim Peters <tim.peters@gmail.com>
Date: Tue, 8 Apr 2003 19:44:13 +0000
Subject: New tests identical to boom and boom2, except using new-style
 classes. These never failed in 2.3, and the tests confirm it.  They still
 blow up in the 2.2 branch, despite that all the gc-vs-__del__ fixes from 2.3
 have been backported (and this is expected -- 2.2 needs more work than 2.3
 needed).

---
 Lib/test/test_gc.py | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/Lib/test/test_gc.py b/Lib/test/test_gc.py
index 0f99ef8..50df818 100644
--- a/Lib/test/test_gc.py
+++ b/Lib/test/test_gc.py
@@ -304,6 +304,48 @@ def test_boom2():
     expect(gc.collect(), 4, "boom2")
     expect(len(gc.garbage), garbagelen, "boom2")
 
+# boom__new and boom2_new are exactly like boom and boom2, except use
+# new-style classes.
+
+class Boom_New(object):
+    def __getattr__(self, someattribute):
+        del self.attr
+        raise AttributeError
+
+def test_boom_new():
+    a = Boom_New()
+    b = Boom_New()
+    a.attr = b
+    b.attr = a
+
+    gc.collect()
+    garbagelen = len(gc.garbage)
+    del a, b
+    expect(gc.collect(), 4, "boom_new")
+    expect(len(gc.garbage), garbagelen, "boom_new")
+
+class Boom2_New(object):
+    def __init__(self):
+        self.x = 0
+
+    def __getattr__(self, someattribute):
+        self.x += 1
+        if self.x > 1:
+            del self.attr
+        raise AttributeError
+
+def test_boom2_new():
+    a = Boom2_New()
+    b = Boom2_New()
+    a.attr = b
+    b.attr = a
+
+    gc.collect()
+    garbagelen = len(gc.garbage)
+    del a, b
+    expect(gc.collect(), 4, "boom2_new")
+    expect(len(gc.garbage), garbagelen, "boom2_new")
+
 def test_get_referents():
     alist = [1, 3, 5]
     got = gc.get_referents(alist)
@@ -347,6 +389,8 @@ def test_all():
     run_test("trashcan", test_trashcan)
     run_test("boom", test_boom)
     run_test("boom2", test_boom2)
+    run_test("boom_new", test_boom_new)
+    run_test("boom2_new", test_boom2_new)
     run_test("get_referents", test_get_referents)
 
 def test():
-- 
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