- test_scoring.py: 7 unit tests for known genes, weight validation, NULL preservation
- test_scoring_integration.py: 3 integration tests for end-to-end pipeline with synthetic data
- Tests verify NULL handling (genes with no evidence get NULL composite score)
- Tests verify known genes rank highly when given high scores
- Tests verify QC detects missing data above thresholds
- All tests use synthetic data (no external API calls, fast, reproducible)
