feat: Set up comprehensive Python testing infrastructure with Poetry

.gitignore

@@ -21,3 +21,92 @@ $RECYCLE.BIN/
 # =========================
 # Operating System Files
 # =========================
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.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
+
+# Virtual environments
+venv/
+ENV/
+env/
+.venv/
+.env
+
+# Testing
+.pytest_cache/
+.coverage
+.coverage.*
+htmlcov/
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.tox/
+nosetests.xml
+coverage/
+*.log
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+.project
+.pydevproject
+.settings/
+
+# Claude
+.claude/*
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# OS
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes

pyproject.toml

@@ -0,0 +1,104 @@
+[tool.poetry]
+name = "python-trading-algorithms"
+version = "0.1.0"
+description = "Python trading algorithms and financial analysis examples"
+authors = ["Your Name <you@example.com>"]
+readme = "README.md"
+packages = [{include = "Chapter7"}, {include = "Chapter8"}]
+
+[tool.poetry.extras]
+fix = ["quickfix"]
+
+[tool.poetry.dependencies]
+python = "^3.8.1"
+pandas = "^2.0.0"
+numpy = "^1.24.0"
+matplotlib = "^3.7.0"
+pandas-datareader = "^0.10.0"
+scikit-learn = "^1.3.0"
+quickfix = {version = "^1.15.1", optional = true}
+twisted = "^23.10.0"
+pyyaml = "^6.0"
+
+[tool.poetry.group.dev.dependencies]
+pytest = "^7.4.0"
+pytest-cov = "^4.1.0"
+pytest-mock = "^3.12.0"
+black = "^23.0.0"
+flake8 = "^6.0.0"
+
+[tool.poetry.scripts]
+test = "pytest:main"
+tests = "pytest:main"
+
+[tool.pytest.ini_options]
+minversion = "7.0"
+testpaths = ["tests"]
+python_files = ["test_*.py", "*_test.py", "*_tests.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+addopts = [
+    "--strict-markers",
+    "--strict-config",
+    "--verbose",
+    "--tb=short",
+    "--cov=.",
+    "--cov-branch",
+    "--cov-report=term-missing:skip-covered",
+    "--cov-report=html:htmlcov",
+    "--cov-report=xml:coverage.xml",
+    "--cov-fail-under=80",
+]
+markers = [
+    "unit: Unit tests",
+    "integration: Integration tests",
+    "slow: Slow running tests",
+]
+filterwarnings = [
+    "error",
+    "ignore::UserWarning",
+    "ignore::DeprecationWarning",
+]
+
+[tool.coverage.run]
+source = ["."]
+omit = [
+    "*/tests/*",
+    "*/test_*",
+    "*/__pycache__/*",
+    "*/venv/*",
+    "*/.venv/*",
+    "*/site-packages/*",
+    "setup.py",
+    "*/migrations/*",
+    "*/__init__.py",
+]
+
+[tool.coverage.report]
+precision = 2
+show_missing = true
+skip_covered = false
+skip_empty = true
+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>=1.0.0"]
+build-backend = "poetry.core.masonry.api"

tests/__init__.py

@@ -0,0 +1 @@
+# Tests package initialization

tests/conftest.py

@@ -0,0 +1,112 @@
+"""
+Shared pytest fixtures and configuration for all tests.
+"""
+import pytest
+import tempfile
+import shutil
+from pathlib import Path
+from unittest.mock import Mock, MagicMock
+import pandas as pd
+import numpy as np
+
+
+@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 mock_config():
+    """Provide a mock configuration object."""
+    config = Mock()
+    config.debug = False
+    config.log_level = "INFO"
+    config.data_dir = "/tmp/test_data"
+    return config
+
+
+@pytest.fixture
+def sample_dataframe():
+    """Create a sample pandas DataFrame for testing."""
+    dates = pd.date_range(start='2023-01-01', end='2023-01-10', freq='D')
+    data = {
+        'Open': np.random.uniform(100, 110, len(dates)),
+        'High': np.random.uniform(110, 120, len(dates)),
+        'Low': np.random.uniform(90, 100, len(dates)),
+        'Close': np.random.uniform(95, 115, len(dates)),
+        'Volume': np.random.randint(1000000, 5000000, len(dates))
+    }
+    df = pd.DataFrame(data, index=dates)
+    return df
+
+
+@pytest.fixture
+def mock_market_data():
+    """Mock market data provider."""
+    mock = MagicMock()
+    mock.get_historical_data.return_value = pd.DataFrame({
+        'Close': [100, 101, 99, 102, 103],
+        'Volume': [1000000, 1100000, 900000, 1200000, 1050000]
+    })
+    return mock
+
+
+@pytest.fixture
+def mock_order():
+    """Create a mock order object."""
+    order = Mock()
+    order.symbol = "AAPL"
+    order.quantity = 100
+    order.price = 150.0
+    order.side = "BUY"
+    order.order_type = "LIMIT"
+    order.status = "PENDING"
+    return order
+
+
+@pytest.fixture
+def mock_portfolio():
+    """Create a mock portfolio object."""
+    portfolio = Mock()
+    portfolio.cash = 100000.0
+    portfolio.positions = {}
+    portfolio.get_total_value = Mock(return_value=100000.0)
+    portfolio.get_position = Mock(return_value=0)
+    return portfolio
+
+
+@pytest.fixture(autouse=True)
+def reset_random_seed():
+    """Reset random seeds for reproducible tests."""
+    np.random.seed(42)
+    import random
+    random.seed(42)
+
+
+@pytest.fixture
+def captured_logs(caplog):
+    """Fixture to capture log messages."""
+    with caplog.at_level("DEBUG"):
+        yield caplog
+
+
+@pytest.fixture
+def mock_file_system(mocker):
+    """Mock file system operations."""
+    mock_open = mocker.mock_open(read_data="test data")
+    mocker.patch("builtins.open", mock_open)
+    return mock_open
+
+
+@pytest.fixture
+def clean_imports(monkeypatch):
+    """Clean module imports between tests."""
+    import sys
+    modules_backup = sys.modules.copy()
+    yield
+    # Restore original modules
+    sys.modules.clear()
+    sys.modules.update(modules_backup)

tests/integration/__init__.py

@@ -0,0 +1 @@
+# Integration tests package