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# --------------------------------------------------------------------------------------
# Copyright (c) 2013-2025, Nucleic Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE, distributed with this software.
# --------------------------------------------------------------------------------------
"""Test post_validate/get/set behaviors
All of them have the following handlers:
no_op_handler: Do nothing
delegate_handler: not tested here (see test_delegate.py)
object_method_old_new_handler: method defined on the Atom object
object_method_name_old_new_handler: method defined on the Atom object
taking the member name as first arg
member_method_object_old_new_handler: Method defined on a Member subclass
"""
import pytest
from atom.api import Int, PostGetAttr, PostSetAttr, PostValidate
GET_MEMBER_METHOD_SRC = """
from atom.api import Atom
class TrackedInt(Int):
def __init__(self):
super(TrackedInt, self).__init__()
mode = PostGetAttr.{mode}
self.set_post_getattr_mode(mode, 'post_getattr')
def post_getattr(self, obj, value):
obj.counter += 1
class PostAtom(Atom):
mi = TrackedInt()
counter = Int()
"""
GET_OBJECT_METHOD_SRC = """
from atom.api import Atom
class PostAtom(Atom):
mi = Int()
counter = Int()
def _post_getattr_mi(self, value):
self.counter += 1
"""
GET_OBJECT_METHOD_NAME_SRC = """
from atom.api import Atom
class PostAtom(Atom):
mi = Int()
mi.set_post_getattr_mode(getattr(PostGetAttr, 'ObjectMethod_NameValue'),
'post_getattr_mi')
counter = Int()
def post_getattr_mi(self, name, value):
self.counter += 1
"""
@pytest.mark.parametrize(
"mode",
(
"NoOp",
"ObjectMethod_Value",
"ObjectMethod_NameValue",
"MemberMethod_ObjectValue",
),
)
def test_post_getattr(mode):
"""Test the post_getattr_behaviors."""
namespace = {}
namespace.update(globals())
src = (
GET_MEMBER_METHOD_SRC
if mode in ("MemberMethod_ObjectValue", "NoOp")
else GET_OBJECT_METHOD_SRC
if mode == "ObjectMethod_Value"
else GET_OBJECT_METHOD_NAME_SRC
)
src = src.format(mode=mode)
print(src)
exec(src, namespace)
PostAtom = namespace["PostAtom"]
# Test subclassed member
pot = PostAtom()
mi = pot.get_member("mi")
assert mi.post_getattr_mode[0] == getattr(PostGetAttr, mode)
pot.mi
assert pot.counter == (1 if mode != "NoOp" else 0)
# Test do_post_*** method
func = getattr(mi, "do_post_getattr")
func(pot, 2)
assert pot.counter == (2 if mode != "NoOp" else 0)
MEMBER_METHOD_SRC = """
from atom.api import Atom
class TrackedInt(Int):
def __init__(self):
super(TrackedInt, self).__init__()
mode = enum.{mode}
self.set_post_{operation}_mode(mode, 'post_{operation}')
def post_{operation}(self, obj, old, new):
obj.counter += 1
class PostAtom(Atom):
mi = TrackedInt()
counter = Int()
"""
OBJECT_METHOD_SRC = """
from atom.api import Atom
class PostAtom(Atom):
mi = Int()
counter = Int()
def _post_{operation}_mi(self, old, new):
self.counter += 1
"""
OBJECT_METHOD_NAME_SRC = """
from atom.api import Atom
class PostAtom(Atom):
mi = Int()
mi.set_post_{operation}_mode(getattr(enum, 'ObjectMethod_NameOldNew'),
'post_{operation}_mi')
counter = Int()
def post_{operation}_mi(self, name, old, new):
self.counter += 1
"""
@pytest.mark.parametrize(
"operation, enum", [("setattr", PostSetAttr), ("validate", PostValidate)]
)
@pytest.mark.parametrize(
"mode",
(
"NoOp",
"ObjectMethod_OldNew",
"ObjectMethod_NameOldNew",
"MemberMethod_ObjectOldNew",
),
)
def test_post_setattr_validate(operation, enum, mode):
"""Test the post_setattr/validate behaviors."""
namespace = {"enum": enum}
namespace.update(globals())
src = (
MEMBER_METHOD_SRC
if mode in ("MemberMethod_ObjectOldNew", "NoOp")
else OBJECT_METHOD_SRC
if mode == "ObjectMethod_OldNew"
else OBJECT_METHOD_NAME_SRC
)
src = src.format(operation=operation, mode=mode)
print(src)
exec(src, namespace)
PostAtom = namespace["PostAtom"]
# Test subclassed member
pot = PostAtom()
mi = pot.get_member("mi")
assert getattr(mi, "post_{}_mode".format(operation))[0] == getattr(enum, mode)
pot.mi = 2
assert pot.counter == (1 if mode != "NoOp" else 0)
# Test do_post_*** method
func = getattr(mi, "do_post_{}".format(operation))
func(pot, 2, 3)
assert pot.counter == (2 if mode != "NoOp" else 0)
@pytest.mark.parametrize(
"operation, mode, msg",
[
("getattr", PostGetAttr.ObjectMethod_Value, "str"),
("getattr", PostGetAttr.ObjectMethod_NameValue, "str"),
("getattr", PostGetAttr.MemberMethod_ObjectValue, "str"),
("setattr", PostSetAttr.ObjectMethod_OldNew, "str"),
("setattr", PostSetAttr.ObjectMethod_NameOldNew, "str"),
("setattr", PostSetAttr.MemberMethod_ObjectOldNew, "str"),
("validate", PostValidate.ObjectMethod_OldNew, "str"),
("validate", PostValidate.ObjectMethod_NameOldNew, "str"),
("validate", PostValidate.MemberMethod_ObjectOldNew, "str"),
],
)
def test_wrong_argument_in_mode_setting(operation, mode, msg):
"""Test handling wrong argument types when setting mode."""
m = Int()
with pytest.raises(TypeError) as excinfo:
getattr(m, "set_post_{}_mode".format(operation))(mode, 1)
assert msg in excinfo.exconly()
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