test-and-fix

name	test-and-fix
description	Run unit tests and automatically fix code failures, regression bugs, or test mismatches. Use when tests are failing, after implementing new features, or to repair "broken" tests.

Test and Fix Loop

Purpose

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

Loop Logic

1. Identify: Run pnpm test to identify failing tests.
2. Analyze: Examine the test output to determine:
   • The failing test file and line number.
   • The expected vs actual values.
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 Fix: Apply the minimum necessary change to either the source code (if it's a bug) or the test code (if the test is outdated).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 pnpm test.
   • If passed: Move to the next failing test or finish if all are resolved.
   • If failed: Analyze the new failure (or the same one if the fix was insufficient) and repeat the loop.

Termination Criteria

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

Examples

Scenario: Fixing a logic error

1. pnpm test fails in packages/common/src/math.test.ts because add(2, 2) returned 5.
2. Agent analyzes packages/common/src/math.ts and finds a typo a + b + 1.
3. Agent fixes the typo to a + b.
4. pnpm test passes.

Scenario: Updating a test after a deliberate change

1. pnpm test fails because a UI component's text changed from "Submit" to "Confirm".
2. Agent confirms the change was intentional.
3. pnpm test passes.

Resources

• Testing Best Practices: Project-specific testing guidelines.