Test And Fix

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 Fix: Apply the minimum necessary change to either the source code (if it's a bug) or the test code (if the test is outdated).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 tests/test_math.py because add(2, 2) returned 5.
2. Agent analyzes src/your_package/math.py and finds a typo a + b + 1.
3. Agent fixes the typo to a + b.
4. make test passes.

Resources

• Python Development Commands: Common commands for testing and managing dependencies.
• Pytest Documentation: Official documentation for the pytest framework.
• Unit Test Manners: Project-specific testing guidelines.

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