def check_oid_reuse(self):
# Requires ShelfStorage oid reuse pack semantics
s1 = ClientStorage(address=self.address)
s1.oid_pool_size = 1
c1 = Connection(s1)
r1 = c1.get_root()
s2 = ClientStorage(address=self.address)
s2.oid_pool_size = 1
c2 = Connection(s2)
r2 = c2.get_root()
r1['a'] = PersistentDict()
r1['b'] = PersistentDict()
c1.commit()
c2.abort()
a_oid = r1['a']._p_oid
assert 'a' in r1 and 'b' in r1 and len(r1['b']) == 0
assert 'a' in r2 and 'b' in r2 and len(r2['b']) == 0
del r2['a'] # remove only reference to a
c2.commit()
c2.pack() # force relinquished oid back into availability
sleep(0.5) # Give time for pack to complete
c2.abort()
assert c2.get(a_oid) is None
c1.abort()
assert c1.get(a_oid)._p_is_ghost()
r2['b']['new'] = Persistent()
r2['b']['new'].bogus = 1
c2.commit()
assert c2.get(a_oid) is r2['b']['new']
c1.abort()
assert c1.get(a_oid).__class__ == PersistentDict
r1['b']['new'].bogus
assert c1.get(a_oid).__class__ == Persistent
s1.close()
