Test finalizers and GC from inside __del__ for new classes.
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@ -124,6 +124,30 @@ def test_finalizer():
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raise TestFailed, "didn't find obj in garbage (finalizer)"
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gc.garbage.remove(obj)
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def test_finalizer_newclass():
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# A() is uncollectable if it is part of a cycle, make sure it shows up
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# in gc.garbage.
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class A(object):
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def __del__(self): pass
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class B(object):
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pass
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a = A()
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a.a = a
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id_a = id(a)
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b = B()
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b.b = b
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gc.collect()
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del a
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del b
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expect_nonzero(gc.collect(), "finalizer")
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for obj in gc.garbage:
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if id(obj) == id_a:
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del obj.a
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break
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else:
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raise TestFailed, "didn't find obj in garbage (finalizer)"
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gc.garbage.remove(obj)
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def test_function():
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# Tricky: f -> d -> f, code should call d.clear() after the exec to
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# break the cycle.
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@ -177,6 +201,21 @@ def test_del():
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gc.disable()
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apply(gc.set_threshold, thresholds)
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def test_del_newclass():
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# __del__ methods can trigger collection, make this to happen
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thresholds = gc.get_threshold()
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gc.enable()
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gc.set_threshold(1)
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class A(object):
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def __del__(self):
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dir(self)
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a = A()
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del a
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gc.disable()
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apply(gc.set_threshold, thresholds)
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class Ouch:
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n = 0
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def __del__(self):
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@ -225,7 +264,9 @@ def test_all():
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run_test("functions", test_function)
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run_test("frames", test_frame)
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run_test("finalizers", test_finalizer)
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run_test("finalizers (new class)", test_finalizer_newclass)
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run_test("__del__", test_del)
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run_test("__del__ (new class)", test_del_newclass)
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run_test("saveall", test_saveall)
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run_test("trashcan", test_trashcan)
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