def test_namedtuple(self):
"""TODO: this fails right now because namedtuples' __new__ is
overridden to accept arguments. remap's default_enter tries
to create an empty namedtuple and gets a TypeError.
Could make it so that immutable types actually don't create a
blank new parent and instead use the old_parent as a
placeholder, creating a new one at exit-time from the value's
__class__ (how default_exit works now). But even then it would
have to *args in the values, as namedtuple constructors don't
take an iterable.
"""
Point = namedtuple('Point', 'x y')
point_map = {'origin': [Point(0, 0)]}
with pytest.raises(TypeError):
remapped = remap(point_map)
assert isinstance(remapped['origin'][0], Point)
def test_namedtuple(self):
"""TODO: this fails right now because namedtuples' __new__ is
overridden to accept arguments. remap's default_enter tries
to create an empty namedtuple and gets a TypeError.
Could make it so that immutable types actually don't create a
blank new parent and instead use the old_parent as a
placeholder, creating a new one at exit-time from the value's
__class__ (how default_exit works now). But even then it would
have to *args in the values, as namedtuple constructors don't
take an iterable.
"""
Point = namedtuple('Point', 'x y')
point_map = {'origin': [Point(0, 0)]}
with pytest.raises(TypeError):
remapped = remap(point_map)
assert isinstance(remapped['origin'][0], Point)
# -*- coding: utf-8 -*-
try:
from cPickle import loads, dumps
except:
from pickle import loads, dumps
from boltons.namedutils import namedlist, namedtuple
Point = namedtuple('Point', 'x, y', rename=True)
MutablePoint = namedlist('MutablePoint', 'x, y', rename=True)
def test_namedlist():
p = MutablePoint(x=10, y=20)
assert p == [10, 20]
p[0] = 11
assert p == [11, 20]
p.x = 12
assert p == [12, 20]
def test_namedlist_pickle():
p = MutablePoint(x=10, y=20)
assert p == loads(dumps(p))
def test_namedtuple_pickle():
p = Point(x=10, y=20)
assert p == loads(dumps(p))