def test_find_leak_boundary_ids(self):
class Referrer:
pass
l = []
state = MemoryState()
state.capture_state()
# Have a foo before in memory just to make things intersting
leaf = Referrer()
l.append(leaf)
leaks = state.find_leak_boundary_ids(leaf)
raise nose.SkipTest
# FIXME:
# This assertion fails on Linux under Python 2.4, probably
# similar issue as below.
self.assertEqual(len(leaks), 1)
leaked_ids = leaks[id(l)]
self.assertEqual(leaked_ids[0], id(leaf))
def _find_leak_boundary_for_class_helper(self, referrer_class):
# Construct the root object before we capture the 'peramanent' memory
# state (or existing memory state...)
root=referrer_class()
root.name = 'root'
print
print 'id:', id(root)
# Snapshot all the object ids in the process.
state = MemoryState()
state.capture_state()
# Now build a simple dependency graph: root->intermediate->leaf
intermediate = referrer_class()
root.child = intermediate
leaf = referrer_class()
intermediate.child = leaf
# We are pretending that we know 'leaf' is leaked here, and we
# want to find any objects prior to our capture_state call that
# refer directly or indirectly to leaf.
leaks = state.find_leak_boundary_objects(leaf)
referrer_ids = get_all_referrers(leaf)
self.assertTrue(id(root) in referrer_ids)
import gc
referrers = gc.get_referrers(intermediate)
print [type(item) for item in referrers]
def test_find_new_objects_matching_class(self):
class Foo:
pass
# Have a foo before in memory just to make things intersting
pre_foo = Foo()
state = MemoryState()
state.capture_state()
foo = Foo()
new_foos = state.find_new_objects_matching_class(Foo)
self.assertEqual(len(new_foos), 1)
self.assertEqual(id(new_foos[0]), id(foo))
def _find_leak_boundary_for_class_helper(self, referrer_class):
# Construct the root object before we capture the 'peramanent' memory
# state (or existing memory state...)
root=referrer_class()
root.name = 'root'
print
print 'id:', id(root)
# Snapshot all the object ids in the process.
state = MemoryState()
state.capture_state()
# Now build a simple dependency graph: root->intermediate->leaf
intermediate = referrer_class()
root.child = intermediate
leaf = referrer_class()
intermediate.child = leaf
# We are pretending that we know 'leaf' is leaked here, and we
# want to find any objects prior to our capture_state call that
# refer directly or indirectly to leaf.
leaks = state.find_leak_boundary_objects(leaf)
referrer_ids = get_all_referrers(leaf)
self.assertTrue(id(root) in referrer_ids)
import gc
referrers = gc.get_referrers(intermediate)
print [type(item) for item in referrers]
print root.__dict__ in referrers
raise nose.SkipTest
# FIXME:
# this assertion succeeds on OS X 10.4 but fails
# on Linux and Windows. It is unclear why.
self.assertEqual(len(leaks), 1)
leak_holder, leaked_objects = leaks[0]
#print leaked_objects[0].name
# FIXME:
# These two assertions don't work properly with nosetests
self.assertEqual(root, leak_holder)
self.assertEqual(intermediate, leaked_objects[0])
def test_capture_state(self):
state = MemoryState()
state.capture_state()
# really weak test...
self.assertTrue(len(state.captured_ids)>0)