commit 9d4e40985a36e439acea0722dbab1a5666d794de
Author: Kirill Samoylenkov <geekiot+github@proton.me>
Date:   Wed Oct 29 03:46:30 2025 +0000

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fb78f5b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,135 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+.vscode
+
+.deployment
+
+.idea
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..32ea255
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+# the_snake
+
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..9e7bfe4
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,7 @@
+[pytest]
+norecursedirs = env/*
+filterwarnings =
+    ignore::DeprecationWarning
+addopts = --tb=short -vv -p no:cacheprovider
+testpaths = tests/
+python_files = test_*.py
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..ad96991
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,7 @@
+flake8==5.0.4
+flake8-docstrings==1.7.0
+pep8-naming==0.13.3
+pycodestyle==2.9.1
+pygame==2.5.2
+pytest==7.1.3
+pytest-timeout==2.1.0
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..b509030
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,14 @@
+[flake8]
+max-line-lenght = 79
+max-complexity = 10
+ignore =
+    W503,
+    F811,
+    D100, D107,
+    D203, D205, D213,
+    D400, D401,
+    N806, N818
+exclude =
+    tests/
+    venv/
+    env/
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..3eb98fc
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,140 @@
+import os
+import sys
+from multiprocessing import Process
+from pathlib import Path
+from typing import Any
+
+from pygame.time import Clock
+import pytest
+import pytest_timeout
+
+BASE_DIR = Path(__file__).resolve(strict=True).parent.parent
+sys.path.append(str(BASE_DIR))
+
+# Hide the pygame screen
+os.environ['SDL_VIDEODRIVER'] = 'dummy'
+
+TIMEOUT_ASSERT_MSG = (
+    'Проект работает некорректно, проверка прервана.\n'
+    'Вероятные причины ошибки:\n'
+    '1. Исполняемый код (например, вызов функции `main()`) оказался в '
+    'глобальной зоне видимости. Как исправить: вызов функции `main` поместите '
+    'внутрь конструкции `if __name__ == "__main__":`.\n'
+    '2. В цикле `while True` внутри функции `main` отсутствует вызов метода '
+    '`tick` объекта `clock`. Не изменяйте прекод в этой части.'
+)
+
+
+def import_the_snake():
+    import the_snake  # noqa
+
+
+@pytest.fixture(scope='session')
+def snake_import_test():
+    check_import_process = Process(target=import_the_snake)
+    check_import_process.start()
+    pid = check_import_process.pid
+    check_import_process.join(timeout=1)
+    if check_import_process.is_alive():
+        os.kill(pid, 9)
+        raise AssertionError(TIMEOUT_ASSERT_MSG)
+
+
+@pytest.fixture(scope='session')
+def _the_snake(snake_import_test):
+    try:
+        import the_snake
+    except ImportError as error:
+        raise AssertionError(
+            'При импорте модуль `the_snake` произошла ошибка:\n'
+            f'{type(error).__name__}: {error}'
+        )
+    for class_name in ('GameObject', 'Snake', 'Apple'):
+        assert hasattr(the_snake, class_name), (
+            f'Убедитесь, что в модуле `the_snake` определен класс `{class_name}`.'
+        )
+    return the_snake
+
+
+def write_timeout_reasons(text, stream=None):
+    """Write possible reasons of tests timeout to stream.
+
+    The function to replace pytest_timeout traceback output with possible
+    reasons of tests timeout.
+    Appears only when `thread` method is used.
+    """
+    if stream is None:
+        stream = sys.stderr
+    text = TIMEOUT_ASSERT_MSG
+    stream.write(text)
+
+
+pytest_timeout.write = write_timeout_reasons
+
+
+def _create_game_object(class_name, module):
+    try:
+        return getattr(module, class_name)()
+    except TypeError as error:
+        raise AssertionError(
+            f'При создании объекта класса `{class_name}` произошла ошибка:\n'
+            f'`{type(error).__name__}: {error}`\n'
+            f'Если в конструктор класса `{class_name}` помимо параметра '
+            '`self` передаются какие-то ещё параметры - убедитесь, что для '
+            'них установлены значения по умолчанию. Например:\n'
+            '`def __init__(self, <параметр>=<значение_по_умолчанию>):`'
+        )
+
+
+@pytest.fixture
+def game_object(_the_snake):
+    return _create_game_object('GameObject', _the_snake)
+
+
+@pytest.fixture
+def snake(_the_snake):
+    return _create_game_object('Snake', _the_snake)
+
+
+@pytest.fixture
+def apple(_the_snake):
+    return _create_game_object('Apple', _the_snake)
+
+
+class StopInfiniteLoop(Exception):
+    pass
+
+
+def loop_breaker_decorator(func):
+    call_counter = 0
+
+    def wrapper(*args, **kwargs):
+        result = func(*args, **kwargs)
+        nonlocal call_counter
+        call_counter += 1
+        if call_counter > 1:
+            raise StopInfiniteLoop
+        return result
+    return wrapper
+
+
+@pytest.fixture
+def modified_clock(_the_snake):
+    class _Clock:
+        def __init__(self, clock_obj: Clock) -> None:
+            self.clock = clock_obj
+
+        @loop_breaker_decorator
+        def tick(self, *args, **kwargs):
+            return self.clock.tick(*args, **kwargs)
+
+        def __getattribute__(self, name: str) -> Any:
+            if name in ['tick', 'clock']:
+                return super().__getattribute__(name)
+            return self.clock.__getattribute__(name)
+
+    original_clock = _the_snake.clock
+    modified_clock_obj = _Clock(original_clock)
+    _the_snake.clock = modified_clock_obj
+    yield
+    _the_snake.clock = original_clock
diff --git a/tests/test_code_structure.py b/tests/test_code_structure.py
new file mode 100644
index 0000000..a23dee3
--- /dev/null
+++ b/tests/test_code_structure.py
@@ -0,0 +1,132 @@
+import pygame
+import pytest
+
+
+EXPECTED_GAME_OBJECT_ATTRS = (
+    ('атрибут', 'position'),
+    ('атрибут', 'body_color'),
+    ('метод', 'draw'),
+)
+
+
+@pytest.mark.parametrize(
+    'attr_type, attr_name',
+    EXPECTED_GAME_OBJECT_ATTRS,
+    ids=[elem[1] for elem in EXPECTED_GAME_OBJECT_ATTRS]
+)
+def test_game_object_attributes(game_object, attr_type, attr_name):
+    assert hasattr(game_object, attr_name), (
+        f'Убедитесь, что у объектов класса `GameObject` определен {attr_type} '
+        f'`{attr_name}`.'
+    )
+
+
+EXPECTED_APPLE_ATTRS = (
+    ('атрибут', 'position'),
+    ('атрибут', 'body_color'),
+    ('метод', 'draw'),
+    ('метод', 'randomize_position'),
+)
+
+
+def test_apple_inherits_from_game_object(_the_snake):
+    assert issubclass(_the_snake.Apple, _the_snake.GameObject), (
+        'Класс `Apple` должен наследоваться от класса `GameObject`.'
+    )
+
+
+@pytest.mark.parametrize(
+    'attr_type, attr_name',
+    EXPECTED_APPLE_ATTRS,
+    ids=[elem[1] for elem in EXPECTED_APPLE_ATTRS]
+)
+def test_apple_attributes(apple, attr_type, attr_name):
+    assert hasattr(apple, attr_name), (
+        f'Убедитесь, что у объектов класса `Apple` определен {attr_type} '
+        f'`{attr_name}`.'
+    )
+
+
+EXPECTED_SNAKE_ATTRS = (
+    ('атрибут', 'position'),
+    ('атрибут', 'body_color'),
+    ('атрибут', 'positions'),
+    ('атрибут', 'direction'),
+    ('метод', 'draw'),
+    ('метод', 'get_head_position'),
+    ('метод', 'move'),
+    ('метод', 'reset'),
+    ('метод', 'update_direction'),
+)
+
+
+def test_snake_inherits_from_game_object(_the_snake):
+    assert issubclass(_the_snake.Snake, _the_snake.GameObject), (
+        'Класс `Snake` должен наследоваться от класса `GameObject`.'
+    )
+
+
+@pytest.mark.parametrize(
+    'attr_type, attr_name',
+    EXPECTED_SNAKE_ATTRS,
+    ids=[elem[1] for elem in EXPECTED_SNAKE_ATTRS]
+)
+def test_snake_attributes(snake, attr_type, attr_name):
+    assert hasattr(snake, attr_name), (
+        f'Убедитесь, что у объектов класса `Snake` определен {attr_type} '
+        f'`{attr_name}`.'
+    )
+
+
+EXPECTED_MODULE_ELEMENTS = (
+    ('константа', 'SCREEN_WIDTH'),
+    ('константа', 'SCREEN_HEIGHT'),
+    ('константа', 'GRID_SIZE'),
+    ('константа', 'GRID_WIDTH'),
+    ('константа', 'GRID_HEIGHT'),
+    ('константа', 'BOARD_BACKGROUND_COLOR'),
+    ('константа', 'UP'),
+    ('константа', 'DOWN'),
+    ('константа', 'LEFT'),
+    ('константа', 'RIGHT'),
+    ('переменная', 'screen'),
+    ('переменная', 'clock'),
+    ('функция', 'main'),
+    ('функция', 'handle_keys'),
+)
+
+
+@pytest.mark.parametrize(
+    'element_type, element_name',
+    EXPECTED_MODULE_ELEMENTS,
+    ids=[elem[1] for elem in EXPECTED_MODULE_ELEMENTS]
+)
+def test_elements_exist(element_type, element_name, _the_snake):
+    assert hasattr(_the_snake, element_name), (
+        f'Убедитесь, что в модуле `the_snake` определена {element_type} '
+        f'`{element_name}`.'
+    )
+
+
+@pytest.mark.parametrize(
+    'expected_type, var_name',
+    (
+        (pygame.Surface, 'screen'),
+        (pygame.time.Clock, 'clock'),
+    ),
+)
+def test_vars_type(expected_type, var_name, _the_snake):
+    assert isinstance(getattr(_the_snake, var_name, None), expected_type), (
+        'Убедитесь, что в модуле `the_snake` есть переменная '
+        f'`{var_name}` типа `{expected_type.__name__}`.'
+    )
+
+
+@pytest.mark.parametrize(
+    'func_name',
+    ('handle_keys', 'main'),
+)
+def test_vars_are_functions(func_name, _the_snake):
+    assert callable(getattr(_the_snake, func_name, None)), (
+        f'Убедитесь, что переменная `{func_name}` - это функция.'
+    )
diff --git a/tests/test_main.py b/tests/test_main.py
new file mode 100644
index 0000000..69f0436
--- /dev/null
+++ b/tests/test_main.py
@@ -0,0 +1,18 @@
+import pytest
+
+from conftest import StopInfiniteLoop
+
+
+@pytest.mark.timeout(1, method='thread')
+@pytest.mark.usefixtures('modified_clock')
+def test_main_run_without_exceptions(_the_snake):
+    try:
+        _the_snake.main()
+    except StopInfiniteLoop:
+        pass
+    except Exception as error:
+        raise AssertionError(
+            'При запуске функции `main` возникло исключение: '
+            f'`{type(error).__name__}: {error}`\n\n'
+            'Убедитесь, что функция работает корректно.'
+        )
diff --git a/the_snake.py b/the_snake.py
new file mode 100644
index 0000000..6d93e4c
--- /dev/null
+++ b/the_snake.py
@@ -0,0 +1,106 @@
+from random import choice, randint
+
+import pygame
+
+# Константы для размеров поля и сетки:
+SCREEN_WIDTH, SCREEN_HEIGHT = 640, 480
+GRID_SIZE = 20
+GRID_WIDTH = SCREEN_WIDTH // GRID_SIZE
+GRID_HEIGHT = SCREEN_HEIGHT // GRID_SIZE
+
+# Направления движения:
+UP = (0, -1)
+DOWN = (0, 1)
+LEFT = (-1, 0)
+RIGHT = (1, 0)
+
+# Цвет фона - черный:
+BOARD_BACKGROUND_COLOR = (0, 0, 0)
+
+# Цвет границы ячейки
+BORDER_COLOR = (93, 216, 228)
+
+# Цвет яблока
+APPLE_COLOR = (255, 0, 0)
+
+# Цвет змейки
+SNAKE_COLOR = (0, 255, 0)
+
+# Скорость движения змейки:
+SPEED = 20
+
+# Настройка игрового окна:
+screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT), 0, 32)
+
+# Заголовок окна игрового поля:
+pygame.display.set_caption('Змейка')
+
+# Настройка времени:
+clock = pygame.time.Clock()
+
+
+# Тут опишите все классы игры.
+...
+
+
+def main():
+    # Инициализация PyGame:
+    pygame.init()
+    # Тут нужно создать экземпляры классов.
+    ...
+
+    # while True:
+    #     clock.tick(SPEED)
+
+        # Тут опишите основную логику игры.
+        # ...
+
+
+if __name__ == '__main__':
+    main()
+
+
+# Метод draw класса Apple
+# def draw(self):
+#     rect = pygame.Rect(self.position, (GRID_SIZE, GRID_SIZE))
+#     pygame.draw.rect(screen, self.body_color, rect)
+#     pygame.draw.rect(screen, BORDER_COLOR, rect, 1)
+
+# # Метод draw класса Snake
+# def draw(self):
+#     for position in self.positions[:-1]:
+#         rect = (pygame.Rect(position, (GRID_SIZE, GRID_SIZE)))
+#         pygame.draw.rect(screen, self.body_color, rect)
+#         pygame.draw.rect(screen, BORDER_COLOR, rect, 1)
+
+#     # Отрисовка головы змейки
+#     head_rect = pygame.Rect(self.positions[0], (GRID_SIZE, GRID_SIZE))
+#     pygame.draw.rect(screen, self.body_color, head_rect)
+#     pygame.draw.rect(screen, BORDER_COLOR, head_rect, 1)
+
+#     # Затирание последнего сегмента
+#     if self.last:
+#         last_rect = pygame.Rect(self.last, (GRID_SIZE, GRID_SIZE))
+#         pygame.draw.rect(screen, BOARD_BACKGROUND_COLOR, last_rect)
+
+# Функция обработки действий пользователя
+# def handle_keys(game_object):
+#     for event in pygame.event.get():
+#         if event.type == pygame.QUIT:
+#             pygame.quit()
+#             raise SystemExit
+#         elif event.type == pygame.KEYDOWN:
+#             if event.key == pygame.K_UP and game_object.direction != DOWN:
+#                 game_object.next_direction = UP
+#             elif event.key == pygame.K_DOWN and game_object.direction != UP:
+#                 game_object.next_direction = DOWN
+#             elif event.key == pygame.K_LEFT and game_object.direction != RIGHT:
+#                 game_object.next_direction = LEFT
+#             elif event.key == pygame.K_RIGHT and game_object.direction != LEFT:
+#                 game_object.next_direction = RIGHT
+
+# Метод обновления направления после нажатия на кнопку
+# def update_direction(self):
+#     if self.next_direction:
+#         self.direction = self.next_direction
+#         self.next_direction = None