Test Fixing

Systematically identify and fix all failing tests using smart grouping strategies.

When to Use

• Explicitly asks to fix tests ("fix these tests", "make tests pass")
• Reports test failures ("tests are failing", "test suite is broken")
• Completes implementation and wants tests passing
• Mentions CI/CD failures due to tests

Systematic Approach

1. Initial Test Run

Run the project's test command to identify all failing tests.

For this project:

npm test        # Unit tests (Vitest)
npm run test:e2e # E2E tests (Playwright)

Analyze output for:

• Total number of failures
• Error types and patterns
• Affected modules/files

2. Smart Error Grouping

Group similar failures by:

• Error type: ImportError, TypeError, AssertionError, etc.
• Module/file: Same file causing multiple test failures
• Root cause: Missing dependencies, API changes, refactoring impacts

Prioritize groups by:

• Number of affected tests (highest impact first)
• Dependency order (fix infrastructure before functionality)

3. Systematic Fixing Process

For each group (starting with highest impact):

1. Identify root cause

   • Read relevant code
   • Check recent changes with git diff
   • Understand the error pattern

2. Implement fix

   • Use Edit tool for code changes
   • Follow project conventions
   • Make minimal, focused changes

3. Verify fix

   • Run subset of tests for this group
   • Use test file patterns:

     npm test -- src/path/to/test.test.ts
     npx playwright test e2e/specific.spec.ts
     

   • Ensure group passes before moving on

4. Move to next group

4. Fix Order Strategy

Infrastructure first:

• Import errors
• Missing dependencies
• Configuration issues

Then API changes:

• Function signature changes
• Module reorganization
• Renamed variables/functions

Finally, logic issues:

• Assertion failures
• Business logic bugs
• Edge case handling

5. Final Verification

After all groups fixed:

• Run complete test suite: npm test && npm run test:e2e
• Verify no regressions
• Check test coverage remains intact

Best Practices

• Fix one group at a time
• Run focused tests after each fix
• Use git diff to understand recent changes
• Look for patterns in failures
• Don't move to next group until current passes
• Keep changes minimal and focused