Add automated test suite for Python tools (parse_contract.py, add_review_comments.py, compare_versions.py)

[cschanhniem]

Problem

The toolkit relies on three Python tools — , , and — that perform file I/O and text processing on legal documents. These tools have no automated test suite. In a legal context where accuracy is critical, untested code risks silently corrupting contracts, misplacing comments, or misreporting diffs.

Evidence

From the project structure:

There is no tests/ directory, no pytest configuration, and no test runner in requirements.txt.

Suggested approach

1. Create tests/test_parse_contract.py — test with a known .docx fixture; verify text extraction matches expected output
2. Create tests/test_add_review_comments.py — test that inline comments are injected at the correct paragraphs
3. Create tests/test_compare_versions.py — test with two known contract versions; verify detected changes match expected diffs
4. Add pytest and python-docx to requirements.txt (if not already present)
5. Add a pytest step to README.md Quick Start

I'm happy to contribute a test fixture set with sample .docx files if that helps.