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import py
class AppTestGC(object):
def test_collect(self):
import gc
gc.collect() # mostly a "does not crash" kind of test
gc.collect(0) # mostly a "does not crash" kind of test
def test_disable_finalizers(self):
import gc
class X(object):
created = 0
deleted = 0
def __init__(self):
X.created += 1
def __del__(self):
X.deleted += 1
class OldX:
created = 0
deleted = 0
def __init__(self):
OldX.created += 1
def __del__(self):
OldX.deleted += 1
def runtest(should_be_enabled):
runtest1(should_be_enabled, X)
runtest1(should_be_enabled, OldX)
def runtest1(should_be_enabled, Cls):
gc.collect()
if should_be_enabled:
assert Cls.deleted == Cls.created
else:
old_deleted = Cls.deleted
Cls(); Cls(); Cls()
gc.collect()
if should_be_enabled:
assert Cls.deleted == Cls.created
else:
assert Cls.deleted == old_deleted
runtest(True)
gc.disable_finalizers()
runtest(False)
runtest(False)
gc.enable_finalizers()
runtest(True)
# test nesting
gc.disable_finalizers()
gc.disable_finalizers()
runtest(False)
gc.enable_finalizers()
runtest(False)
gc.enable_finalizers()
runtest(True)
raises(ValueError, gc.enable_finalizers)
runtest(True)
def test_enable(self):
import gc
assert gc.isenabled()
gc.disable()
assert not gc.isenabled()
gc.enable()
assert gc.isenabled()
gc.enable()
assert gc.isenabled()
def test_gc_collect_overrides_gc_disable(self):
import gc
deleted = []
class X(object):
def __del__(self):
deleted.append(1)
assert gc.isenabled()
gc.disable()
X()
gc.collect()
assert deleted == [1]
gc.enable()
class AppTestGcDumpHeap(object):
pytestmark = py.test.mark.xfail(run=False)
def setup_class(cls):
import py
from rpython.tool.udir import udir
from rpython.rlib import rgc
class X(object):
def __init__(self, count, size, links):
self.count = count
self.size = size
self.links = links
def fake_heap_stats():
return [X(1, 12, [0, 0]), X(2, 10, [10, 0])]
cls._heap_stats = rgc._heap_stats
rgc._heap_stats = fake_heap_stats
fname = udir.join('gcdump.log')
cls.w_fname = cls.space.wrap(str(fname))
cls._fname = fname
def teardown_class(cls):
import py
from rpython.rlib import rgc
rgc._heap_stats = cls._heap_stats
assert py.path.local(cls._fname).read() == '1 12 0,0\n2 10 10,0\n'
def test_gc_heap_stats(self):
import gc
gc.dump_heap_stats(self.fname)
class AppTestGcMethodCache(object):
def test_clear_method_cache(self):
import gc, weakref
rlist = []
def f():
class C(object):
def f(self):
pass
C().f() # Fill the method cache
rlist.append(weakref.ref(C))
for i in range(10):
f()
gc.collect() # the classes C should all go away here
# the last class won't go in mapdict, as long as the code object of f
# is around
rlist.pop()
for r in rlist:
assert r() is None
def test_clear_index_cache(self):
import gc, weakref
rlist = []
def f():
class C(object):
def f(self):
pass
c = C()
c.x = 1
getattr(c, "x") # fill the index cache without using the local cache
getattr(c, "x")
rlist.append(weakref.ref(C))
for i in range(5):
f()
gc.collect() # the classes C should all go away here
for r in rlist:
assert r() is None
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