Pass data between beforeEach, afterEach and it in mocha tests.

test.js

var expect = require('expect');

describe.only('Sample', function () {

  beforeEach(function () {
    this.currentTest.value = 'Winning!';
  });

  it('Uses current test data', function () {
    expect(this.test.value).to.equal('Winning!');
    this.test.value = 'Win Later';
  });

  afterEach(function () {
    expect(this.currentTest.value).to.equal('Win Later');
  });

});