def test_split(self):
"""Test splitting into subgraphs.
"""
foo = Foo()
bar = Bar()
idfoo = id(foo)
idbar = id(bar)
idfd = id(foo.__dict__)
idbd = id(bar.__dict__)
foo.next = bar
bar.prev = foo
l = []
l.append(l)
idl = id(l)
del foo
del bar
del l
gb = GarbageGraph()
subs = list(gb.split())
self.assertEqual(len(subs), 2)
fbg = [x for x in subs if x.count == 4][0]
lig = [x for x in subs if x.count == 1][0]
self.assert_(isinstance(fbg, GarbageGraph))
self.assert_(isinstance(lig, GarbageGraph))
self.assertEqual(len(fbg.edges), 4, fbg.edges)
self.assertEqual(len(lig.edges), 1, lig.edges)
self.assert_(_Edge(idl, idl, '') in lig.edges, lig.edges)
self.assert_(_Edge(idfoo, idfd, '__dict__') in fbg.edges, fbg.edges)
self.assert_(_Edge(idfd, idbar, 'next') in fbg.edges, fbg.edges)
self.assert_(_Edge(idbar, idbd, '__dict__') in fbg.edges, fbg.edges)
self.assert_(_Edge(idbd, idfoo, 'prev') in fbg.edges, fbg.edges)
def test_edges_new(self):
"""Test referent identification for new-style classes.
"""
foo = FooNew()
bar = BarNew()
idfoo = id(foo)
idfd = id(foo.__dict__)
idbar = id(bar)
idbd = id(bar.__dict__)
foo.next = bar
bar.prev = foo
del foo
del bar
gb = GarbageGraph()
self.assert_(_Edge(idfoo, idfd, '__dict__') in gb.edges, gb.edges)
self.assert_(_Edge(idfd, idbar, 'next') in gb.edges, gb.edges)
self.assert_(_Edge(idbar, idbd, '__dict__') in gb.edges, gb.edges)
self.assert_(_Edge(idbd, idfoo, 'prev') in gb.edges, gb.edges)