beforeAfter.js

/*jshint node:true */
"use strict";

var order = [];
function deferred(statement, delay) {
  return function(done) {
    order.push(statement+' start');
    setTimeout(function() {
      order.push(statement+' end');
      done();
    }, delay);
  };
}

function immediate(statement) {
  return function() {
    order.push(statement);
  };
}

describe('outer', function() {

  before(deferred('before 1', 25));
  beforeEach(deferred('beforeEach 1', 25));
  after(deferred('after 1', 25));
  afterEach(deferred('afterEach 1', 25));
  before(immediate('before 2'));
  before(deferred('before 3', 10));
  before(immediate('before 4'));
  after(immediate('after 2'));
  afterEach(deferred('afterEach 2', 10));

  // before 1 2 3 4

  // beforeEach 1
  it('is great', immediate('* test: great'));
  // afterEach 1 2

  // beforeEach 1
  it('is fantastic', deferred('* test: fantastic',10));
  // afterEach 1 2

  describe('inner', function() {

    before(deferred('before A', 25));
    beforeEach(deferred('beforeEach A', 25));
    after(deferred('after A', 25));
    afterEach(deferred('afterEach A', 25));
    before(immediate('before B'));
    after(immediate('after B'));
    afterEach(deferred('afterEach B', 25));

    // before A B

    // beforeEach A 1
    it('is super', immediate('* test: super'));
    // afterEach A B 1 2

    // beforeEach A 1
    it('is awesome', deferred('* test: awesome',10));
    // afterEach A B 1 2

    // after A B
  });

  // after 1 2
});

process.on('exit', function() {
  process.stdout.write('order:\n'+order.join('\n')+'\n');
});

output.txt

order:
before 1 start
before 1 end
before 2
before 3 start
before 3 end
before 4
beforeEach 1 start
beforeEach 1 end
* test: great
afterEach 1 start
afterEach 1 end
afterEach 2 start
afterEach 2 end
beforeEach 1 start
beforeEach 1 end
* test: fantastic start
* test: fantastic end
afterEach 1 start
afterEach 1 end
afterEach 2 start
afterEach 2 end
before A start
before A end
before B
beforeEach 1 start
beforeEach 1 end
beforeEach A start
beforeEach A end
* test: super
afterEach A start
afterEach A end
afterEach B start
afterEach B end
afterEach 1 start
afterEach 1 end
afterEach 2 start
afterEach 2 end
beforeEach 1 start
beforeEach 1 end
beforeEach A start
beforeEach A end
* test: awesome start
* test: awesome end
afterEach A start
afterEach A end
afterEach B start
afterEach B end
afterEach 1 start
afterEach 1 end
afterEach 2 start
afterEach 2 end
after A start
after A end
after B
after 1 start
after 1 end
after 2