feat: Set up comprehensive Python testing infrastructure with Poetry and pytest

.gitignore

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+# 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/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Testing
+.pytest_cache/
+.coverage
+.coverage.*
+htmlcov/
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.tox/
+.nox/
+coverage/
+.cache
+nosetests.xml
+test-results/
+junit/
+*.log
+
+# Claude settings
+.claude/*
+
+# Virtual environments
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+.venv/
+virtualenv/
+
+# IDEs and editors
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+.project
+.pydevproject
+.settings/
+.DS_Store
+*.sublime-project
+*.sublime-workspace
+
+# Jupyter Notebook
+.ipynb_checkpoints
+*.ipynb_checkpoints/
+
+# pyenv
+.python-version
+
+# pipenv
+Pipfile.lock
+
+# Poetry
+# Note: poetry.lock should be committed for applications
+# but can be ignored for libraries
+# poetry.lock
+
+# PEP 582
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.env.*
+*.env
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# Local development
+local/
+scratch/
+tmp/
+temp/
+
+# OS files
+Thumbs.db
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db

pyproject.toml

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+[tool.poetry]
+name = "ml-projects"
+version = "0.1.0"
+description = "Machine Learning and Reinforcement Learning Projects"
+authors = ["Your Name <you@example.com>"]
+readme = "README.md"
+packages = [{include = "*.py"}]
+
+[tool.poetry.dependencies]
+python = "^3.8"
+
+[tool.poetry.group.dev.dependencies]
+pytest = "^7.4.3"
+pytest-cov = "^4.1.0"
+pytest-mock = "^3.12.0"
+
+[tool.poetry.scripts]
+test = "pytest:main"
+tests = "pytest:main"
+
+[tool.pytest.ini_options]
+minversion = "7.0"
+testpaths = ["tests"]
+python_files = ["test_*.py", "*_test.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+addopts = [
+    "-ra",
+    "--strict-markers",
+    "-vv",
+    "--tb=short",
+    "--maxfail=1",
+]
+markers = [
+    "unit: Unit tests",
+    "integration: Integration tests",
+    "slow: Slow tests",
+]
+# To run with coverage, use: poetry run pytest --cov=. --cov-report=html --cov-report=term-missing
+filterwarnings = [
+    "error",
+    "ignore::UserWarning",
+    "ignore::DeprecationWarning",
+]
+
+[tool.coverage.run]
+source = ["."]
+omit = [
+    "*/tests/*",
+    "*/test_*",
+    "*/__pycache__/*",
+    "*/venv/*",
+    "*/env/*",
+    "*.pyc",
+    "*/site-packages/*",
+    "setup.py",
+    "*/migrations/*",
+    "*/.tox/*",
+    "*/.coverage/*",
+    "*/htmlcov/*",
+    "*/.pytest_cache/*",
+]
+
+[tool.coverage.report]
+precision = 2
+show_missing = true
+skip_covered = false
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "if self.debug:",
+    "if settings.DEBUG",
+    "raise AssertionError",
+    "raise NotImplementedError",
+    "if 0:",
+    "if __name__ == .__main__.:",
+    "if TYPE_CHECKING:",
+    "class .*\\bProtocol\\):",
+    "@(abc\\.)?abstractmethod",
+]
+
+[tool.coverage.html]
+directory = "htmlcov"
+
+[tool.coverage.xml]
+output = "coverage.xml"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

tests/conftest.py

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+import pytest
+import tempfile
+import shutil
+import os
+from pathlib import Path
+from unittest.mock import Mock, MagicMock
+
+
+@pytest.fixture
+def temp_dir():
+    """Create a temporary directory for test files."""
+    temp_path = tempfile.mkdtemp()
+    yield Path(temp_path)
+    shutil.rmtree(temp_path)
+
+
+@pytest.fixture
+def temp_file(temp_dir):
+    """Create a temporary file in the temporary directory."""
+    def _temp_file(filename="test_file.txt", content=""):
+        file_path = temp_dir / filename
+        file_path.write_text(content)
+        return file_path
+    return _temp_file
+
+
+@pytest.fixture
+def mock_config():
+    """Provide a mock configuration object."""
+    config = MagicMock()
+    config.debug = False
+    config.verbose = True
+    config.timeout = 30
+    config.max_retries = 3
+    return config
+
+
+@pytest.fixture
+def mock_logger():
+    """Provide a mock logger for testing."""
+    logger = Mock()
+    logger.debug = Mock()
+    logger.info = Mock()
+    logger.warning = Mock()
+    logger.error = Mock()
+    logger.critical = Mock()
+    return logger
+
+
+@pytest.fixture
+def sample_data():
+    """Provide sample data for testing."""
+    return {
+        "integers": [1, 2, 3, 4, 5],
+        "floats": [1.0, 2.5, 3.7, 4.2, 5.9],
+        "strings": ["alpha", "beta", "gamma", "delta", "epsilon"],
+        "mixed": [1, "two", 3.0, True, None],
+        "nested": {
+            "level1": {
+                "level2": {
+                    "data": "deep_value"
+                }
+            }
+        }
+    }
+
+
+@pytest.fixture
+def env_vars():
+    """Temporarily set environment variables."""
+    original_env = os.environ.copy()
+
+    def _set_env(**kwargs):
+        for key, value in kwargs.items():
+            os.environ[key] = str(value)
+        return os.environ
+
+    yield _set_env
+
+    # Restore original environment
+    os.environ.clear()
+    os.environ.update(original_env)
+
+
+@pytest.fixture
+def mock_file_system(monkeypatch):
+    """Mock file system operations."""
+    mock_open_func = Mock()
+    mock_exists = Mock(return_value=True)
+    mock_isfile = Mock(return_value=True)
+    mock_isdir = Mock(return_value=False)
+
+    monkeypatch.setattr("builtins.open", mock_open_func)
+    monkeypatch.setattr("os.path.exists", mock_exists)
+    monkeypatch.setattr("os.path.isfile", mock_isfile)
+    monkeypatch.setattr("os.path.isdir", mock_isdir)
+
+    return {
+        "open": mock_open_func,
+        "exists": mock_exists,
+        "isfile": mock_isfile,
+        "isdir": mock_isdir
+    }
+
+
+@pytest.fixture(autouse=True)
+def reset_imports():
+    """Reset imports between tests to ensure clean state."""
+    import sys
+    modules_before = set(sys.modules.keys())
+    yield
+    modules_after = set(sys.modules.keys())
+    for module in modules_after - modules_before:
+        if module.startswith("test_"):
+            del sys.modules[module]
+
+
+@pytest.fixture
+def capture_stdout(monkeypatch):
+    """Capture stdout for testing print statements."""
+    import io
+    import sys
+
+    captured = io.StringIO()
+    monkeypatch.setattr(sys, "stdout", captured)
+
+    def get_output():
+        return captured.getvalue()
+
+    return get_output
+
+
+@pytest.fixture(scope="session")
+def test_resources_dir():
+    """Provide path to test resources directory."""
+    resources_path = Path(__file__).parent / "resources"
+    resources_path.mkdir(exist_ok=True)
+    return resources_path
+
+
+@pytest.fixture
+def mock_requests(monkeypatch):
+    """Mock requests library for HTTP testing."""
+    mock_response = Mock()
+    mock_response.status_code = 200
+    mock_response.json.return_value = {"status": "success"}
+    mock_response.text = "Mock response text"
+
+    mock_get = Mock(return_value=mock_response)
+    mock_post = Mock(return_value=mock_response)
+
+    mock_requests = Mock()
+    mock_requests.get = mock_get
+    mock_requests.post = mock_post
+    mock_requests.Response = Mock
+
+    monkeypatch.setattr("requests.get", mock_get)
+    monkeypatch.setattr("requests.post", mock_post)
+
+    return mock_requests