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# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
""" Test the Adapter class. """
import unittest
from traits.api import on_trait_change
from traits.adaptation.api import Adapter
class TestAdapter(unittest.TestCase):
""" Test the Adapter class. """
#### Tests ################################################################
def test_initializing_adaptee(self):
# Regression test: The `adaptee` trait used to be initialized after
# all other traits, which caused "post_init" listeners to be
# incorrectly triggered.
class FooAdapter(Adapter):
# True if a trait change notification for `adaptee` is fired.
adaptee_notifier_called = False
# True if a post-init trait change notification for `adaptee`
# is fired.
post_init_notifier_called = False
@on_trait_change("adaptee", post_init=True)
def check_that_adaptee_start_can_be_accessed(self):
self.post_init_notifier_called = True
@on_trait_change("adaptee")
def check_that_adaptee_change_is_notified(self):
self.adaptee_notifier_called = True
foo_adapter = FooAdapter(adaptee="1234")
self.assertEqual(foo_adapter.adaptee_notifier_called, True)
self.assertEqual(foo_adapter.post_init_notifier_called, False)
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