coverage-report

Coverage Report

Context

• Project type: ![ -f "package.json" ] && echo "Node.js" || [ -f "pyproject.toml" ] && echo "Python" || [ -f "go.mod" ] && echo "Go" || echo "Unknown"
• Test framework: ![ -f "package.json" ] && (grep -q "jest" package.json && echo "Jest" || grep -q "vitest" package.json && echo "Vitest" || echo "Unknown") || [ -f "pyproject.toml" ] && echo "pytest" || echo "Unknown"
• Coverage files: !find . -name "coverage" -o -name "htmlcov" -o -name "coverage.out" 2>/dev/null | head -5

Your Task

Generate a comprehensive test coverage report and provide analysis with recommendations.

Arguments

• $1 (optional): Report format - terminal, html, json, or all (default: terminal)

Steps

1. Generate coverage report based on framework:

   Jest:

   npm test -- --coverage --coverageReporters=text --coverageReporters=html --coverageReporters=json
   

   Vitest:

   vitest run --coverage
   

   pytest:

   pytest --cov=src --cov-report=term-missing --cov-report=html --cov-report=json
   

   Go:

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

2. Display terminal report with key metrics:

   • Overall coverage percentage
   • Line coverage
   • Branch coverage
   • Function coverage
   • Statement coverage

3. Analyze coverage data and identify:

   • Files with 0% coverage
   • Files with <50% coverage
   • Critical files with low coverage
   • Uncovered branches and error paths

4. Provide recommendations:

   High Priority (address first):

   • List files with 0% coverage
   • Identify critical business logic with low coverage
   • Highlight security-related code without tests

   Medium Priority (address next):

   • List files with <50% coverage
   • Identify API endpoints without tests
   • Highlight database operations without tests

   Low Priority (address if time permits):

   • List files with 50-70% coverage
   • Identify UI components without tests
   • Highlight utility functions with partial coverage