@scintilla-network/litest/src/coverage.js

Dependency-free test framework with full Vitest API compatibility. Zero-dependency replacement for Vitest to reduce risk of supply chain attacks.

/**
 * Code coverage reporting for litest (placeholder implementation)
 * 
 * This module provides code coverage capabilities.
 * Currently shows a professional "coming soon" message with alternatives.
 */

import { c } from './colors.js';

/**
 * Generate coverage report
 * @param {Object} options - Coverage options
 * @param {string[]} options.files - Files to analyze
 * @param {string} options.reporter - Reporter type (html, lcov, text)
 */
function generateCoverageReport(options = {}) {
    console.log(c.bold('\n📊 Code Coverage'));
    console.log(c.muted('━'.repeat(50)));
    
    console.log(`
${c.yellow('⚠️  Built-in coverage is coming in a future release!')}

${c.bold('Planned Features:')}
  ${c.green('•')} Line, branch, and function coverage
  ${c.green('•')} HTML, LCOV, and text reporters
  ${c.green('•')} Coverage thresholds and enforcement
  ${c.green('•')} Exclude patterns for generated files
  ${c.green('•')} Integration with CI/CD pipelines

${c.bold('Current Alternative - Using c8:')}
  
  ${c.muted('# Install c8 (v8 coverage)')}
  ${c.green('npm install --save-dev c8')}
  
  ${c.muted('# Add to package.json scripts:')}
  ${c.green('"test:coverage": "c8 litest"')}
  
  ${c.muted('# Run with coverage')}
  ${c.green('npm run test:coverage')}
  
  ${c.muted('# Generate HTML report')}
  ${c.green('c8 --reporter=html litest')}

${c.bold('Alternative - Using nyc:')}
  
  ${c.muted('# Install nyc')}
  ${c.green('npm install --save-dev nyc')}
  
  ${c.muted('# Run with coverage')}
  ${c.green('nyc litest')}

${c.bold('Example c8 configuration (.c8rc.json):')}
${c.muted(`{
  "include": ["src/**/*.js"],
  "exclude": ["**/*.spec.js", "**/*.test.js"],
  "reporter": ["text", "html", "lcov"],
  "check-coverage": true,
  "lines": 80,
  "functions": 80,
  "branches": 80,
  "statements": 80
}`)}

${c.bold('Track Progress:')}
  ${c.blue('https://github.com/Alex-Werner/litest/issues')}
`);
    
    process.exit(0);
}

/**
 * Check if coverage is supported
 * @returns {boolean} Always false for now
 */
function isCoverageSupported() {
    return false;
}

/**
 * Initialize coverage collection
 */
function initializeCoverage() {
    // Placeholder for future implementation
    return null;
}

/**
 * Finalize coverage collection and generate report
 */
function finalizeCoverage() {
    // Placeholder for future implementation
    return null;
}

export { 
    generateCoverageReport, 
    isCoverageSupported, 
    initializeCoverage, 
    finalizeCoverage 
};