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# ==================================================================================================================== #
# _____ _ _ __ __ _ ____ _ #
# _ __ _ |_ _|__ ___ | (_)_ __ __ _ | \/ | ___| |_ __ _ / ___| | __ _ ___ ___ ___ ___ #
# | '_ \| | | || |/ _ \ / _ \| | | '_ \ / _` | | |\/| |/ _ \ __/ _` | | | |/ _` / __/ __|/ _ \/ __| #
# | |_) | |_| || | (_) | (_) | | | | | | (_| |_| | | | __/ || (_| | |___| | (_| \__ \__ \ __/\__ \ #
# | .__/ \__, ||_|\___/ \___/|_|_|_| |_|\__, (_)_| |_|\___|\__\__,_|\____|_|\__,_|___/___/\___||___/ #
# |_| |___/ |___/ #
# ==================================================================================================================== #
# Authors: #
# Patrick Lehmann #
# #
# License: #
# ==================================================================================================================== #
# Copyright 2017-2026 Patrick Lehmann - Bötzingen, Germany #
# #
# 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. #
# #
# SPDX-License-Identifier: Apache-2.0 #
# ==================================================================================================================== #
#
"""
Unit tests for class :class:`pyTooling.MetaClasses.ExtendedType`.
"""
from typing import ClassVar
from unittest import TestCase
from pyTooling.MetaClasses import ExtendedType, ExtendedTypeError
if __name__ == "__main__": # pragma: no cover
print("ERROR: you called a testcase declaration file as an executable module.")
print("Use: 'python -m unittest <testcase module>'")
exit(1)
class WithoutSlots(TestCase):
def test_NoInitValue_NoDunderInit_ClassCheck(self) -> None:
class Base(metaclass=ExtendedType):
_data0: ClassVar[int]
with self.assertRaises(AttributeError, msg="Class field '_data0' shouldn't be initialized on class 'Base'."):
_ = Base._data0
def test_NoInitValue_NoDunderInit_InstCheck(self) -> None:
class Base(metaclass=ExtendedType):
_data0: ClassVar[int]
inst = Base()
with self.assertRaises(AttributeError, msg="Field '_data0' should not exist on instance."):
_ = inst._data0
def test_InitValue_NoDunderInit_ClassCheck(self) -> None:
class Base(metaclass=ExtendedType):
_data0: ClassVar[int] = 1
self.assertEqual(1, Base._data0)
def test_InitValue_DunderInit_ClassCheck(self) -> None:
class Base(metaclass=ExtendedType):
_data0: ClassVar[int] = 1
def __init__(self) -> None:
pass
self.assertEqual(1, Base._data0)
class WithSlots(TestCase):
def test_InitValue_NoDunderInit_ClassCheck(self) -> None:
class Base(metaclass=ExtendedType, slots=True):
_data0: ClassVar[int] = 1
self.assertEqual(1, Base._data0)
def test_InitValue_DunderInit_ClassCheck(self) -> None:
class Base(metaclass=ExtendedType, slots=True):
_data0: ClassVar[int] = 1
def __init__(self) -> None:
pass
self.assertEqual(1, Base._data0)
def test_InitValue_InitOverwrite_InstantiationCheck(self) -> None:
class Base(metaclass=ExtendedType, slots=True):
_data0: ClassVar[int] = 1
def __init__(self) -> None:
self._data0 = 5
with self.assertRaises(AttributeError, msg="Class field '_data0' should not be accessible from within instance."):
_ = Base()
def test_InitValue_InitReadValue_InstantiationCheck(self) -> None:
class Base(metaclass=ExtendedType, slots=True):
_data0: ClassVar[int] = 1
_data1: int
def __init__(self) -> None:
self._data1 = self._data0 + 5
self.assertEqual(1, Base._data0)
inst = Base()
self.assertEqual(6, inst._data1)
class Inheritance_WithSlots(TestCase):
def test_BaseAssigned(self) -> None:
class Base(metaclass=ExtendedType, slots=True):
_data0: ClassVar[int] = 1
class Parent(Base):
pass
self.assertEqual(1, Base._data0)
self.assertEqual(1, Parent._data0)
base = Base()
self.assertEqual(1, base._data0)
parent = Parent()
self.assertEqual(1, parent._data0)
def test_BaseAssigned_ParentAssigned(self) -> None:
class Base(metaclass=ExtendedType, slots=True):
_data0: ClassVar[int] = 1
class Parent(Base):
_data0: ClassVar[int] = 2
self.assertEqual(1, Base._data0)
self.assertEqual(2, Parent._data0)
base = Base()
self.assertEqual(1, base._data0)
parent = Parent()
self.assertEqual(2, parent._data0)
|
