sinon.js mock usage

sinon_mock.js

'use strict';

var sinon  = require('sinon');
var assert = require('assert');

var testObject = {
  'testMethod': function () {

    return 'testtest';
  }
};

describe('sinon mock usage, our testMethod', function () {

  var mockTestObject;

  it('returns "testtest" normally', function () {

    assert.equal(testObject.testMethod(), 'testtest');
  });

  it('returns "hello" after mock usage', function () {

    mockTestObject = sinon.mock(testObject);
    mockTestObject.expects('testMethod').returns('hello');

    assert.equal(testObject.testMethod(), 'hello');
  });

  it('returns "testtest" after restoring original state', function () {

    mockTestObject.restore();
    assert.equal(testObject.testMethod(), 'testtest');
  });
});