feat: Set up comprehensive Python testing infrastructure with Poetry

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+Pipfile.lock
+
+# poetry
+# Note: Do NOT ignore poetry.lock - it should be committed
+dist/
+
+# PEP 582
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# IDEs
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Claude settings
+.claude/*
+
+# Testing specific
+test-results/
+.benchmarks/
+
+# Temporary files
+*.tmp
+*.temp
+*.bak
+
+# OS specific
+Thumbs.db
+ehthumbs.db
+Desktop.ini
+$RECYCLE.BIN/
+*.lnk

CLAUDE.md

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+# Project Context
+
+This file contains important context and notes for Claude Code.
+
+## Testing Commands
+- Run tests: `poetry run test` or `poetry run tests`
+- Run specific test: `poetry run pytest tests/path/to/test.py`
+- Run with coverage: `poetry run pytest --cov`
+- Run unit tests only: `poetry run pytest -m unit`
+- Run integration tests only: `poetry run pytest -m integration`
+- Run without slow tests: `poetry run pytest -m "not slow"`
+
+## Linting Commands
+- To be determined after setup
+
+## Project Structure
+- Tests are located in `tests/` directory
+- Unit tests in `tests/unit/`
+- Integration tests in `tests/integration/`
+- Test configuration in `pyproject.toml`
+- Shared fixtures in `tests/conftest.py`
+
+## Package Management
+- Using Poetry for dependency management
+- Install dependencies: `poetry install`
+- Add new dependency: `poetry add <package>`
+- Add dev dependency: `poetry add --group dev <package>`

pyproject.toml

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+[tool.poetry]
+name = "web-thinker"
+version = "0.1.0"
+description = "A project for web search and thinking capabilities"
+authors = ["Your Name <you@example.com>"]
+readme = "README.md"
+packages = [{include = "scripts"}, {include = "demo"}]
+
+[tool.poetry.dependencies]
+python = "^3.9"
+torch = "^2.5.0"
+transformers = "^4.46.0"
+sentencepiece = "^0.2.0"
+# vllm = "0.6.4"  # Commented out due to system dependencies
+tqdm = "^4.67.0"
+nltk = "^3.9.0"
+
+[tool.poetry.group.dev.dependencies]
+pytest = "^8.0.0"
+pytest-cov = "^5.0.0"
+pytest-mock = "^3.14.0"
+
+[tool.poetry.scripts]
+test = "pytest:main"
+tests = "pytest:main"
+
+[tool.pytest.ini_options]
+minversion = "8.0"
+testpaths = ["tests"]
+python_files = ["test_*.py", "*_test.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+addopts = [
+    "--strict-markers",
+    "--verbose",
+    "--cov=scripts",
+    "--cov=demo",
+    "--cov-report=html",
+    "--cov-report=xml",
+    "--cov-report=term-missing",
+    # "--cov-fail-under=80",  # Uncomment when actual tests are written
+]
+markers = [
+    "unit: Unit tests",
+    "integration: Integration tests",
+    "slow: Slow running tests",
+]
+filterwarnings = [
+    "ignore::DeprecationWarning",
+    "ignore::PendingDeprecationWarning",
+]
+
+[tool.coverage.run]
+source = ["scripts", "demo"]
+omit = [
+    "*/tests/*",
+    "*/__pycache__/*",
+    "*/test_*.py",
+    "*/*_test.py",
+    "*/conftest.py",
+    "*/setup.py",
+]
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "if self.debug:",
+    "if __name__ == .__main__.:",
+    "raise AssertionError",
+    "raise NotImplementedError",
+    "if TYPE_CHECKING:",
+]
+precision = 2
+show_missing = true
+skip_covered = false
+
+[tool.coverage.html]
+directory = "htmlcov"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

tests/__init__.py

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+# Tests package initialization