| import gc |
| |
| def test_list(): |
| l = [] |
| l.append(l) |
| gc.collect() |
| del l |
| assert gc.collect() == 1 |
| |
| def test_dict(): |
| d = {} |
| d[1] = d |
| gc.collect() |
| del d |
| assert gc.collect() == 1 |
| |
| def test_tuple(): |
| l = [] |
| t = (l,) |
| l.append(t) |
| gc.collect() |
| del t |
| del l |
| assert gc.collect() == 2 |
| |
| def test_class(): |
| class A: |
| pass |
| A.a = A |
| gc.collect() |
| del A |
| assert gc.collect() > 0 |
| |
| def test_instance(): |
| class A: |
| pass |
| a = A() |
| a.a = a |
| gc.collect() |
| del a |
| assert gc.collect() > 0 |
| |
| def test_method(): |
| class A: |
| def __init__(self): |
| self.init = self.__init__ |
| a = A() |
| gc.collect() |
| del a |
| assert gc.collect() > 0 |
| |
| def test_finalizer(): |
| class A: |
| def __del__(self): pass |
| class B: |
| pass |
| a = A() |
| a.a = a |
| id_a = id(a) |
| b = B() |
| b.b = b |
| gc.collect() |
| gc.garbage[:] = [] |
| del a |
| del b |
| assert gc.collect() > 0 |
| assert id(gc.garbage[0]) == id_a |
| |
| def test_function(): |
| d = {} |
| exec("def f(): pass\n") in d |
| gc.collect() |
| del d |
| assert gc.collect() == 2 |
| |
| |
| def test_all(): |
| |
| enabled = gc.isenabled() |
| gc.disable() |
| assert not gc.isenabled() |
| |
| test_list() |
| test_dict() |
| test_tuple() |
| test_class() |
| test_instance() |
| test_method() |
| test_finalizer() |
| test_function() |
| |
| # test gc.enable() even if GC is disabled by default |
| gc.enable() |
| assert gc.isenabled() |
| if not enabled: |
| gc.disable() |
| |
| |
| test_all() |