Mocha timeouts

test.js

var assert = require('assert');

describe('Synchronous timeout', () => {
  beforeEach(() => {
    var x = Date.now();
    while (Date.now() < x + 2100) {}
  });
  it('Tests nothing', () => assert.equal(1, 1));
});

describe('Asynchronous timeout', () => {
  beforeEach((done) => {
    setTimeout(done, 2100);
  });
  it('Tests nothing', () => assert.equal(1, 1));
});

describe('Combination timeout', () => {
  beforeEach((done) => {
    var x = Date.now();
    while (Date.now() < x + 1500) {}
    setTimeout(done, 600);
  });
  it('Tests nothing', () => assert.equal(1, 1));
});