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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 the get behaviors
no_op_handler: : tested here
slot_handler: standard one tested through other tests (post_get, ...)
event_handler: not tested here (see test_observe.py and
test_event_binder.py)
signal_handler: not tested here (see test_observe.py)
delegate_handler: not tested here (see test_delegate.py)
property_handler: not tested here (see test_property.py)
cached_property_handler: not tested here (see test_property.py)
call_object_object_handler: tested here
call_object_object_name_handler: tested here
object_method_handler: tested here
object_method_name_handler: tested here
member_method_object_handler: method defined on a Member subclass
"""
import pytest
from atom.api import Atom, GetAttr, Int, Value
def test_using_no_op_handler():
"""Test using the no_op handler."""
v = Value()
v.set_getattr_mode(GetAttr.NoOp, None)
class CustomGetAtom(Atom):
val = v
a = CustomGetAtom()
assert a.val is None
a.val = 1
assert a.val is None
def test_using_call_object_object_mode():
"""Test using call_object_object mode."""
def getter(object):
object.count += 1
return object.count
m = Int()
m.set_getattr_mode(GetAttr.CallObject_Object, getter)
class CustomGetAtom(Atom):
val = m
count = Int()
a = CustomGetAtom()
assert a.val == 1
assert a.val == 2
with pytest.raises(TypeError):
m.set_getattr_mode(GetAttr.CallObject_Object, 1)
def test_using_call_object_object_name_mode():
"""Test using call_object_object_name mode."""
def getter(object, name):
object.count += 1
return object.count, name
m = Value()
m.set_getattr_mode(GetAttr.CallObject_ObjectName, getter)
class CustomGetAtom(Atom):
val = m
count = Int()
a = CustomGetAtom()
assert a.val == (1, "val")
assert a.val == (2, "val")
with pytest.raises(TypeError):
m.set_getattr_mode(GetAttr.CallObject_ObjectName, 1)
def test_using_object_method_mode():
"""Test using object_method mode."""
m = Int()
m.set_getattr_mode(GetAttr.ObjectMethod, "getter")
class CustomGetAtom(Atom):
val = m
count = Int()
def getter(self):
self.count += 1
return self.count
a = CustomGetAtom()
assert a.val == 1
assert a.val == 2
with pytest.raises(TypeError):
m.set_getattr_mode(GetAttr.ObjectMethod, 1)
def test_using_object_method_name_mode():
"""Test using object_method mode."""
m = Value()
m.set_getattr_mode(GetAttr.ObjectMethod_Name, "getter")
class CustomGetAtom(Atom):
val = m
count = Int()
def getter(self, name):
self.count += 1
return (self.count, name)
a = CustomGetAtom()
assert a.val == (1, "val")
assert a.val == (2, "val")
with pytest.raises(TypeError):
m.set_getattr_mode(GetAttr.ObjectMethod_Name, 1)
def test_subclassing_member():
"""Test defining get in a Member subclass"""
class ModuloInt(Int):
def __init__(self):
super(ModuloInt, self).__init__()
mode = GetAttr.MemberMethod_Object
self.set_getattr_mode(mode, "get")
def get(self, obj):
return self.get_slot(obj) % 2
class GetTest(Atom):
mi = ModuloInt()
pvt = GetTest()
mi = pvt.get_member("mi")
assert mi.getattr_mode[0] == GetAttr.MemberMethod_Object
pvt.mi = 2
assert pvt.mi == 0
pvt.mi = 3
assert pvt.mi == 1
pvt.mi = 2
assert mi.do_getattr(pvt) == 0
pvt.mi = 3
assert mi.do_getattr(pvt) == 1
with pytest.raises(TypeError):
Int().set_getattr_mode(GetAttr.MemberMethod_Object, 1)
def test_handling_wrong_index():
"""Test handling a wrong index in the slot handler."""
class SlotAtom(Atom):
v = Value()
sa = SlotAtom()
assert SlotAtom.v.do_getattr(sa) is None
SlotAtom.v.set_index(SlotAtom.v.index + 1)
with pytest.raises(AttributeError):
SlotAtom.v.do_getattr(sa)
def test_using_invalid_args():
"""Test using the invalid arguments."""
v = Value()
with pytest.raises(TypeError):
v.set_getattr_mode(None)
with pytest.raises(TypeError):
v.set_getattr_mode(7, None)
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