How to use the kotti.security.principals_with_local_roles function in Kotti

session = DBSession()
        root = get_root()
        child = root[u'child'] = Node()
        session.flush()

        self.assertEqual(principals_with_local_roles(root), [])
        self.assertEqual(principals_with_local_roles(child), [])
        self.assertEqual(map_principals_with_local_roles(root), [])
        self.assertEqual(map_principals_with_local_roles(child), [])

        set_groups('group:bobsgroup', child, ['role:editor'])
        set_groups('bob', root, ['group:bobsgroup'])
        set_groups('group:franksgroup', root, ['role:editor'])

        self.assertEqual(
            set(principals_with_local_roles(child)),
            set(['bob', 'group:bobsgroup', 'group:franksgroup'])
            )
        self.assertEqual(
            set(principals_with_local_roles(child, inherit=False)),
            set(['group:bobsgroup'])
            )
        self.assertEqual(
            set(principals_with_local_roles(root)),
            set(['bob', 'group:franksgroup'])
            )

)

        # We make a copy of 'child', and we expect the local roles to
        # be copied over:
        child2 = root['child2'] = child.copy()
        DBSession.flush()
        self.assertEqual(
            set(principals_with_local_roles(child2)),
            set(['bob', 'group:bobsgroup', 'group:franksgroup'])
            )
        self.assertEqual(len(principals_with_local_roles(child)), 3)

        # When we now change the local roles of 'child', the copy is
        # unaffected:
        set_groups('group:bobsgroup', child, [])
        self.assertEqual(len(principals_with_local_roles(child)), 2)
        self.assertEqual(len(principals_with_local_roles(child2)), 3)

self.assertEqual(map_principals_with_local_roles(child), [])

        set_groups('group:bobsgroup', child, ['role:editor'])
        set_groups('bob', root, ['group:bobsgroup'])
        set_groups('group:franksgroup', root, ['role:editor'])

        self.assertEqual(
            set(principals_with_local_roles(child)),
            set(['bob', 'group:bobsgroup', 'group:franksgroup'])
            )
        self.assertEqual(
            set(principals_with_local_roles(child, inherit=False)),
            set(['group:bobsgroup'])
            )
        self.assertEqual(
            set(principals_with_local_roles(root)),
            set(['bob', 'group:franksgroup'])
            )

def test_principals_with_local_roles(self):
        session = DBSession()
        root = get_root()
        child = root[u'child'] = Node()
        session.flush()

        self.assertEqual(principals_with_local_roles(root), [])
        self.assertEqual(principals_with_local_roles(child), [])
        self.assertEqual(map_principals_with_local_roles(root), [])
        self.assertEqual(map_principals_with_local_roles(child), [])

        set_groups('group:bobsgroup', child, ['role:editor'])
        set_groups('bob', root, ['group:bobsgroup'])
        set_groups('group:franksgroup', root, ['role:editor'])

        self.assertEqual(
            set(principals_with_local_roles(child)),
            set(['bob', 'group:bobsgroup', 'group:franksgroup'])
            )
        self.assertEqual(
            set(principals_with_local_roles(child, inherit=False)),
            set(['group:bobsgroup'])
            )

self.assertEqual(principals_with_local_roles(root), [])
        self.assertEqual(principals_with_local_roles(child), [])
        self.assertEqual(map_principals_with_local_roles(root), [])
        self.assertEqual(map_principals_with_local_roles(child), [])

        set_groups('group:bobsgroup', child, ['role:editor'])
        set_groups('bob', root, ['group:bobsgroup'])
        set_groups('group:franksgroup', root, ['role:editor'])

        self.assertEqual(
            set(principals_with_local_roles(child)),
            set(['bob', 'group:bobsgroup', 'group:franksgroup'])
            )
        self.assertEqual(
            set(principals_with_local_roles(child, inherit=False)),
            set(['group:bobsgroup'])
            )
        self.assertEqual(
            set(principals_with_local_roles(root)),
            set(['bob', 'group:franksgroup'])
            )

def test_copy_local_groups(self):
        self.test_principals_with_local_roles()
        root = get_root()
        child = root[u'child']
        self.assertEqual(
            set(principals_with_local_roles(child)),
            set(['bob', 'group:bobsgroup', 'group:franksgroup'])
            )

        # We make a copy of 'child', and we expect the local roles to
        # be copied over:
        child2 = root['child2'] = child.copy()
        DBSession.flush()
        self.assertEqual(
            set(principals_with_local_roles(child2)),
            set(['bob', 'group:bobsgroup', 'group:franksgroup'])
            )
        self.assertEqual(len(principals_with_local_roles(child)), 3)

        # When we now change the local roles of 'child', the copy is
        # unaffected:
        set_groups('group:bobsgroup', child, [])