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# ------------------------------------------------------------------------------
# Copyright (c) 2020-2024, Nucleic Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE, distributed with this software.
# ------------------------------------------------------------------------------
import gc
from weakref import ref
import pytest
from enaml.callableref import CallableRef
from enaml.weakmethod import WeakMethod
class CObj:
def __init__(self):
self.counter = 0
self.last_args = None
self.last_kwargs = None
def __call__(self, *args, **kwargs):
self.counter += 1
self.last_args = args
self.last_kwargs = kwargs
return 1
def test_callableref_lifetime():
"""Test creating a callable ref and calling it before and after the object death.
"""
obj = CObj()
cr = CallableRef(obj)
assert cr(1, 2, a=1, b=2) == 1
assert obj.counter == 1
assert obj.last_args == (1, 2)
assert obj.last_kwargs == dict(a=1, b=2)
del obj
gc.collect()
assert cr() is None
def test_callableref_call():
"""Test calling a callable ref with different args/kwargs.
"""
obj = CObj()
cr = CallableRef(obj)
cr()
assert obj.counter == 1
assert obj.last_args == ()
assert obj.last_kwargs == {}
cr(1, 2)
assert obj.counter == 2
assert obj.last_args == (1, 2)
assert obj.last_kwargs == {}
cr(a=1, b=2)
assert obj.counter == 3
assert obj.last_args == ()
assert obj.last_kwargs == dict(a=1, b=2)
def test_callableref_call_weakmethod():
"""Test calling a callable ref with different args/kwargs.
"""
obj = CObj()
cr = CallableRef(WeakMethod(obj.__call__))
cr()
assert obj.counter == 1
assert obj.last_args == ()
assert obj.last_kwargs == {}
cr(1, 2)
assert obj.counter == 2
assert obj.last_args == (1, 2)
assert obj.last_kwargs == {}
cr(a=1, b=2)
assert obj.counter == 3
assert obj.last_args == ()
assert obj.last_kwargs == dict(a=1, b=2)
def test_callableref_callback():
"""Test that callback are properly sets.
"""
obj = CObj()
cb = CObj()
cr = CallableRef(obj, cb)
del obj
gc.collect()
assert cr() is None
assert cb.counter == 1
def test_callableref_comparison():
"""Test comparison of CallableRef.
"""
obj1 = CObj()
obj2 = CObj()
cr1 = CallableRef(obj1)
cr1_2 = CallableRef(obj1)
cr2 = CallableRef(obj2)
assert cr1 == cr1_2
assert cr1 != cr2
assert cr1 == ref(obj1)
assert cr1 != ref(obj2)
assert cr1 != None
with pytest.raises(TypeError):
cr1 > cr2
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