test-and-fix

Imported from yu-iskw/data-agent-ctl (.claude/skills/test-and-fix/SKILL.md). Install upstream with npx skills add yu-iskw/data-agent-ctl --skill test-and-fix. Copyright stays with the author.

Test and Fix Loop

Purpose

An autonomous loop for the agent to identify, analyze, and fix failing unit tests using pytest.

Loop Logic

1. Identify: Run make test to identify failing tests.
2. Analyze: Examine the pytest output to determine:
   • The failing test file and line number.
   • The expected vs actual values (assertion errors).
   • Tracebacks for runtime errors.
3. Fix: Apply the minimum necessary change to either the source code (if it's a bug) or the test code (if the test is outdated).
4. Verify: Re-run make test (or uv run pytest path/to/failing_test.py for speed).
   • If passed: Move to the next failing test or finish if all are resolved.
   • If failed: Analyze the new failure and repeat the loop.

Termination Criteria

• All tests pass (as reported by make test).
• Reached max iteration limit (default: 5).
• The error persists after multiple distinct fix attempts, indicating a need for human intervention.

Examples

Scenario: Fixing a logic error

1. make test fails in src/your_package/tests/test_dummy.py due to an assertion or import error.
2. Agent inspects the failing test and the implementation under src/your_package/.
3. Agent applies the minimum fix in source or test so behavior matches the intended contract.
4. make test passes.

Resources

• Pytest Documentation: Official documentation for the pytest framework.
• Testing conventions for this repo: AGENTS.md (Testing section).