openevolve-fixed/tests/integration/README.md

Integration Tests

This directory contains integration tests for OpenEvolve. Tests are organized into two categories:

Fast Tests (CI)

Smoke tests that run in CI to validate basic functionality without requiring slow LLM inference:

# Run only fast tests (for CI)
pytest tests/integration/ -m "not slow"

These tests:

• Complete in <10 seconds total
• Test core API validation, configuration, and basic component initialization
• No real LLM calls required

Slow Tests (Local Development)

Full integration tests with real LLM inference for comprehensive validation:

# Run all tests including slow ones (for local development)
pytest tests/integration/

# Run only slow tests
pytest tests/integration/ -m "slow"

These tests:

• Take ~1 hour to complete
• Use real optillm server with google/gemma-3-270m-it model
• Test complete evolution pipelines, checkpointing, island migration, etc.
• Require optillm server running on localhost:8000

Test Setup

For slow tests that require LLM inference:

1. Install optillm: pip install optillm
2. Start server: OPTILLM_API_KEY=optillm optillm --model google/gemma-3-270m-it --port 8000
3. Set environment: export OPTILLM_API_KEY=optillm OPENAI_API_KEY=optillm
4. Run tests: pytest tests/integration/ -m "slow"

Configuration

All integration tests use:

• 0 retries for fast failure
• 120 second timeout per LLM call
• In-memory database for speed
• Small iteration counts (1-8 iterations) for CI compatibility

CI Behavior

GitHub Actions will:

• Run fast tests only (-m "not slow")
• Complete in <30 seconds
• Validate core functionality without requiring model downloads
• Skip all tests marked with @pytest.mark.slow