Mocha silent reporter.

much-silence-reporter.js

/* eslint no-console:0, no-proto:0 */
const Base = require('mocha/lib/reporters/base');

function Min (runner) {
  Base.call(this, runner);
  let failed = false;
  runner.on('fail', () => {
    failed = true;
  });
  runner.on('end', () => console.log(`Tests ${failed ? 'failed' : 'passed'}.\n`));
}

Min.prototype.__proto__ = Base.prototype;

exports = module.exports = Min;