1const assert = require('assert'); 2 3class Parent {} 4class A extends Parent {} 5 6module.exports = A; 7require('./warning-moduleexports-class-b.js'); 8process.nextTick(() => { 9 assert.strictEqual(module.exports, A); 10 assert.strictEqual(Object.getPrototypeOf(module.exports), Parent); 11}); 12