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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!
""" Tests for regular Python properties in a HasTraits subclass. """
import unittest
from traits.api import HasTraits
class Model(HasTraits):
def __init__(self):
super().__init__()
self._value = 0
@property
def read_only(self):
return 1729
@property
def value(self):
return self._value
@value.setter
def value(self, new):
self._value = new
class TestPythonProperty(unittest.TestCase):
def test_read_only_property(self):
model = Model()
self.assertEqual(model.read_only, 1729)
with self.assertRaises(AttributeError):
model.read_only = 2034
with self.assertRaises(AttributeError):
del model.read_only
def test_read_write_property(self):
model = Model()
self.assertEqual(model.value, 0)
model.value = 23
self.assertEqual(model.value, 23)
model.value = 77
self.assertEqual(model.value, 77)
with self.assertRaises(AttributeError):
del model.value
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