# Copyright 2019 TerraPower, LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tests of the propereties class."""
import unittest
from armi.utils import properties
[docs]class ImmutableClass:
myNum = properties.createImmutableProperty(
"myNum", "You must invoke the initialize() method", "My random number"
)
[docs] def initialize(self, val):
properties.unlockImmutableProperties(self)
try:
self.myNum = val
finally:
properties.lockImmutableProperties(self)
[docs]class ImmutablePropertyTests(unittest.TestCase):
[docs] def test_retreivingUnassignedValueRaisesError(self):
ic = ImmutableClass()
with self.assertRaises(properties.ImmutablePropertyError):
print(ic.myNum)
[docs] def test_cannotAssignValueToImmutableProperty(self):
ic = ImmutableClass()
ic.myNum = 4.0
with self.assertRaises(properties.ImmutablePropertyError):
ic.myNum = 2.2
self.assertEqual(ic.myNum, 4.0)
[docs] def test_unlockDoesNotPermitsReassignmentOfAnImmutableProperty(self):
ic = ImmutableClass()
ic.myNum = 7.7
with self.assertRaises(properties.ImmutablePropertyError):
ic.initialize(3.4)
self.assertEqual(ic.myNum, 7.7)