Test Coverage Analyzer

Analyze test coverage gaps and suggest tests to write

Analyze test coverage gaps and suggest which tests to write next.

Instructions

1. Run coverage report:

# JavaScript (Jest/Vitest)
npx jest --coverage --coverageReporters=text
# or
npx vitest --coverage

# Python
pytest --cov=src --cov-report=term-missing

# Go
go test -coverprofile=coverage.out ./...
go tool cover -func=coverage.out

2. Identify gaps — focus on:

   • Uncovered branches: if/else paths not exercised
   • Uncovered functions: public functions with 0% coverage
   • High-risk uncovered code: error handlers, auth checks, payment logic

3. Prioritize by risk:

   Priority	What to test	Why
   Critical	Auth, payments, data mutations	Security & correctness
   High	Business logic, API endpoints	User-facing behavior
   Medium	Utility functions, formatters	Catch edge cases
   Low	Logging, analytics, UI styling	Unlikely to cause bugs

4. Generate test suggestions: For each uncovered function, write a test skeleton with the cases needed.

Target Coverage

• Overall: 80%+
• Critical paths (auth, payments): 95%+
• New code: 100% (enforce in CI with --changedSince flag)