Programmatic V8 Coverage Collection via node:inspector

const inspector = require('node:inspector');
const session = new inspector.Session();
session.connect();
 
async function collectV8Coverage(testFn) {
  session.post('Profiler.enable');
  session.post('Profiler.startPreciseCoverage', { callCount: true, detailed: true });
 
  await testFn();
 
  return new Promise((resolve, reject) => {
    session.post('Profiler.takePreciseCoverage', (err, { result }) => {
      session.post('Profiler.stopPreciseCoverage');
      session.post('Profiler.disable');
      session.disconnect();
      if (err) return reject(err);
      resolve(result);
    });
  });
}