Reference

• Test-Driven Development in Node.js With Mocha
• Asynchronous, Test-Driven Development, with JavaScript and Mocha
• Testing node.js apps with mocha
• Mocha Offical Page
• Functional Testing For Node.js Using Mocha and Zombie.js
• SuperAgent
• Testing in Node.js
• Chai Assertion Library

package.json devDependancies

devDependencies: {
  "chai": "*",
  "mocha": "*" // our preference, but you can use any test runner you like
}

Mocha structure

• describe() is used to group together similar tests in Mocha
• It() describes a specific use-case for the method being tested.
• done() callback – Testing asynchronous code
• before(), after(), beforeEach(), afterEach() – hooks to setup the test case
• Pending tests – without a callback

chai BDD styles

API Reference

var expect = chai.expect;
expect(foo).to.be.a('string');
expect(foo).to.equal('bar');
expect(foo).to.have.length(3);
expect(tea).to.have.property('flavors')
    .with.length(3);