def testPersistent(self):
o = Persistent()
o.id = 1
p = P(o)
self.assertEquals(p.id,1)
self.assert_(p.ref is o)
self.assert_(getP(o) is p)
self.assert_(deref(p) is o)
self.assert_(p() is o)
self.assert_(p.deref() is o)
self.assertEquals(id(deref(p)),id(o))
self.assertEquals(getP(o),p)
self.assertEquals(len(P.instances),1)
self.assert_(p)
self.assertEquals(p,P(o))
self.assert_(getP(o) is not p)
self.assertEquals(p.__getstate__(),dict(id=1))
def testNull(self):
p = P()
self.assertEquals(p.id,None)
self.assertEquals(p.ref,None)
self.assertEquals(str(p),'PNone')
self.assertFalse(p)
self.assertTrue(p==P())
self.assertTrue(p==P.null)
self.assertEquals(p(),None)
self.assertEquals(p.deref(),None)
self.assertEquals(deref(p),None)
self.assertTrue(p==getP(None))
self.assertEquals(p.__getstate__(),dict(id=None))