def test_addition(self):
     umapper = inspect(self.classes.User)
     amapper = inspect(self.classes.Address)
     p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
     p2 = PathRegistry.coerce((amapper, amapper.attrs.email_address))
     eq_(
         p1 + p2,
         PathRegistry.coerce((umapper, umapper.attrs.addresses,
                             amapper, amapper.attrs.email_address))
     )

    def test_expand(self):
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)
        path = PathRegistry.coerce((umapper,))

        eq_(
            path[umapper.attrs.addresses][amapper]
                [amapper.attrs.email_address],
            PathRegistry.coerce((umapper, umapper.attrs.addresses,
                                amapper, amapper.attrs.email_address))
        )

 def test_indexed_key(self):
     umapper = inspect(self.classes.User)
     amapper = inspect(self.classes.Address)
     path = PathRegistry.coerce((umapper, umapper.attrs.addresses,
                             amapper, amapper.attrs.email_address))
     eq_(path[1], umapper.attrs.addresses)
     eq_(path[3], amapper.attrs.email_address)

 def test_indexed_entity(self):
     umapper = inspect(self.classes.User)
     amapper = inspect(self.classes.Address)
     path = PathRegistry.coerce((umapper, umapper.attrs.addresses,
                             amapper, amapper.attrs.email_address))
     is_(path[0], umapper)
     is_(path[2], amapper)

    def test_path(self):
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)

        p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
        p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
        p3 = PathRegistry.coerce((amapper, amapper.attrs.email_address))

        eq_(
            p1.path, (umapper, umapper.attrs.addresses)
        )
        eq_(
            p2.path, (umapper, umapper.attrs.addresses, amapper)
        )
        eq_(
            p3.path, (amapper, amapper.attrs.email_address)
        )

    def test_eq(self):
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)
        u_alias = inspect(aliased(self.classes.User))
        p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
        p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
        p3 = PathRegistry.coerce((umapper, umapper.attrs.name))
        p4 = PathRegistry.coerce((u_alias, umapper.attrs.addresses))
        p5 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
        p6 = PathRegistry.coerce((amapper, amapper.attrs.user, umapper,
                                umapper.attrs.addresses))
        p7 = PathRegistry.coerce((amapper, amapper.attrs.user, umapper,
                                umapper.attrs.addresses,
                                amapper, amapper.attrs.email_address))

        is_(p1 == p2, True)
        is_(p1 == p3, False)
        is_(p1 == p4, False)
        is_(p1 == p5, False)
        is_(p6 == p7, False)
        is_(p6 == p7.parent.parent, True)

        is_(p1 != p2, False)
        is_(p1 != p3, True)
        is_(p1 != p4, True)
        is_(p1 != p5, True)

    def test_registry_contains(self):
        reg = self._registry()
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)

        p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
        p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
        p3 = PathRegistry.coerce((amapper, amapper.attrs.email_address))
        reg.update(
            {
                ('p1key', p1.path): 'p1value',
                ('p2key', p2.path): 'p2value',
                ('p3key', p3.path): 'p3value',
            }
        )
        assert p1.contains(reg, "p1key")
        assert not p1.contains(reg, "p2key")
        assert p3.contains(reg, "p3key")
        assert not p2.contains(reg, "fake")

    def test_length(self):
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)
        pneg1 = PathRegistry.coerce(())
        p0 = PathRegistry.coerce((umapper,))
        p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
        p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
        p3 = PathRegistry.coerce((umapper, umapper.attrs.addresses,
                                amapper, amapper.attrs.email_address))

        eq_(len(pneg1), 0)
        eq_(len(p0), 1)
        eq_(len(p1), 2)
        eq_(len(p2), 3)
        eq_(len(p3), 4)
        eq_(pneg1.length, 0)
        eq_(p0.length, 1)
        eq_(p1.length, 2)
        eq_(p2.length, 3)
        eq_(p3.length, 4)

    def test_registry_set(self):
        reg = self._registry()
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)

        p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
        p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
        p3 = PathRegistry.coerce((amapper, amapper.attrs.email_address))

        p1.set(reg, "p1key", "p1value")
        p2.set(reg, "p2key", "p2value")
        p3.set(reg, "p3key", "p3value")
        eq_(
            reg,
            {
                ('p1key', p1.path): 'p1value',
                ('p2key', p2.path): 'p2value',
                ('p3key', p3.path): 'p3value',
            }
        )

    def test_deseralize(self):
        User = self.classes.User
        Address = self.classes.Address
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)


        p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper,
                            amapper.attrs.email_address))
        p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
        p3 = PathRegistry.coerce((umapper, umapper.attrs.addresses))

        eq_(
            PathRegistry.deserialize([(User, "addresses"),
                        (Address, "email_address")]),
            p1
        )
        eq_(
            PathRegistry.deserialize([(User, "addresses"), (Address, None)]),
            p2
        )
        eq_(
            PathRegistry.deserialize([(User, "addresses")]),
            p3
        )

    def test_serialize(self):
        User = self.classes.User
        Address = self.classes.Address
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)

        p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper,
                            amapper.attrs.email_address))
        p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
        p3 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
        eq_(
            p1.serialize(),
            [(User, "addresses"), (Address, "email_address")]
        )
        eq_(
            p2.serialize(),
            [(User, "addresses"), (Address, None)]
        )
        eq_(
            p3.serialize(),
            [(User, "addresses")]
        )

    def test_plain(self):
        Person = _poly_fixtures.Person
        Engineer = _poly_fixtures.Engineer
        pmapper = inspect(Person)
        emapper = inspect(Engineer)

        p1 = PathRegistry.coerce((pmapper, emapper.attrs.machines))

        # given a mapper and an attribute on a subclass,
        # the path converts what you get to be against that subclass
        eq_(
            p1.path,
            (emapper, emapper.attrs.machines)
        )

    def test_registry_setdefault(self):
        reg = self._registry()
        umapper = inspect(self.classes.User)
        amapper = inspect(self.classes.Address)

        p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
        p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
        reg.update(
            {
                ('p1key', p1.path): 'p1value',
            }
        )

        p1.setdefault(reg, "p1key", "p1newvalue_a")
        p1.setdefault(reg, "p1key_new", "p1newvalue_b")
        p2.setdefault(reg, "p2key", "p2newvalue")
        eq_(
            reg,
            {
                ('p1key', p1.path): 'p1value',
                ('p1key_new', p1.path): 'p1newvalue_b',
                ('p2key', p2.path): 'p2newvalue',
            }
        )

    def test_plain_aliased(self):
        Person = _poly_fixtures.Person
        Engineer = _poly_fixtures.Engineer
        emapper = inspect(Engineer)

        p_alias = aliased(Person)
        p_alias = inspect(p_alias)

        p1 = PathRegistry.coerce((p_alias, emapper.attrs.machines))
        # plain AliasedClass - the path keeps that AliasedClass directly
        # as is in the path
        eq_(
            p1.path,
            (p_alias, emapper.attrs.machines)
        )

    def test_with_poly_use_mapper(self):
        Person = _poly_fixtures.Person
        Engineer = _poly_fixtures.Engineer
        emapper = inspect(Engineer)

        p_poly = with_polymorphic(Person, [Engineer], _use_mapper_path=True)
        p_poly = inspect(p_poly)

        p1 = PathRegistry.coerce((p_poly, emapper.attrs.machines))

        # polymorphic AliasedClass with the "use_mapper_path" flag -
        # the AliasedClass acts just like the base mapper
        eq_(
            p1.path,
            (emapper, emapper.attrs.machines)
        )

    def test_plain_compound(self):
        Company = _poly_fixtures.Company
        Person = _poly_fixtures.Person
        Engineer = _poly_fixtures.Engineer
        cmapper = inspect(Company)
        pmapper = inspect(Person)
        emapper = inspect(Engineer)

        p1 = PathRegistry.coerce((cmapper, cmapper.attrs.employees,
                        pmapper, emapper.attrs.machines))

        # given a mapper and an attribute on a subclass,
        # the path converts what you get to be against that subclass
        eq_(
            p1.path,
            (cmapper, cmapper.attrs.employees, emapper, emapper.attrs.machines)
        )

    def test_with_poly_sub(self):
        Person = _poly_fixtures.Person
        Engineer = _poly_fixtures.Engineer
        emapper = inspect(Engineer)

        p_poly = with_polymorphic(Person, [Engineer])
        e_poly = inspect(p_poly.Engineer)
        p_poly = inspect(p_poly)

        p1 = PathRegistry.coerce((p_poly, emapper.attrs.machines))

        # polymorphic AliasedClass - the path uses _entity_for_mapper()
        # to get the most specific sub-entity
        eq_(
            p1.path,
            (e_poly, emapper.attrs.machines)
        )

    def test_with_poly_base(self):
        Person = _poly_fixtures.Person
        Engineer = _poly_fixtures.Engineer
        pmapper = inspect(Person)
        emapper = inspect(Engineer)

        p_poly = with_polymorphic(Person, [Engineer])
        p_poly = inspect(p_poly)

        # "name" is actually on Person, not Engineer
        p1 = PathRegistry.coerce((p_poly, emapper.attrs.name))

        # polymorphic AliasedClass - because "name" is on Person,
        # we get Person, not Engineer
        eq_(
            p1.path,
            (p_poly, pmapper.attrs.name)
        )

    def test_plain_aliased_compound(self):
        Company = _poly_fixtures.Company
        Person = _poly_fixtures.Person
        Engineer = _poly_fixtures.Engineer
        cmapper = inspect(Company)
        emapper = inspect(Engineer)

        c_alias = aliased(Company)
        p_alias = aliased(Person)

        c_alias = inspect(c_alias)
        p_alias = inspect(p_alias)

        p1 = PathRegistry.coerce((c_alias, cmapper.attrs.employees,
                    p_alias, emapper.attrs.machines))
        # plain AliasedClass - the path keeps that AliasedClass directly
        # as is in the path
        eq_(
            p1.path,
            (c_alias, cmapper.attrs.employees, p_alias, emapper.attrs.machines)
        )

 def test_aliased_class(self):
     User = self.classes.User
     ua = aliased(User)
     ua_insp = inspect(ua)
     path = PathRegistry.coerce((ua_insp, ua_insp.mapper.attrs.addresses))
     assert path.parent.is_aliased_class