book

Learning Behavior-driven development with Javascript

by Enrique Javier A Rubio

February 2015

Intermediate to advanced

392 pages

8h 12m

English

Packt Publishing

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What this book covers

Downloading the example codeErrataPiracyQuestions
The test-first approachThe test-first cycleWrite a failing testMake the test passClean the codeRepeat!Consequences of the test-first cycle
Test doubles
Node and NPM as development platformsInstalling Node and NPM
Useful options in MochaOur first test-first cycle
Working with the "should" interface
Parameterized testsOrganizing your setupDefining test scenarios
Is it traditional TDD or BDD?Welcome Sinon!Integrating Sinon and Chai
Introducing myCafé
Displaying a customer's orderTips for writing featuresStarting to code the scenarios
Testing a callback-based APITesting a promise-based APIInterlude – promises 101Mocha and promisesChai-as-PromisedTest doubles with promises
The storage object patternThe example factory patternFinishing the scenarioParameterized scenarios
Getting started with Gherkin and Cucumber.jsPreparing your projectWriting your first scenario in GherkinExecuting GherkinThe World object patternBetter step handlersBetter reporting
Gherkin example tablesConsolidating stepsAdvanced setupGherkin-driven example factoryImplicit versus explicit setupThe Background sectionParameterized scenariosFinishing the feature
Tagging features and scenariosHooksThe before hookThe after hookThe around hookNon-English Gherkin
The approachA strategy to test web APIsMocha or Cucumber.js?The plan
Exploring our feature a bitStarting, stopping, and setting up our serverTesting whether the API responds with 200 OkShould we use a realistic order object?Implementing the testTesting our HAL resource for ordersThe contract with the business layerFinishing the scenario
The order actionsTesting embedded resourcesExtracting cross-cutting scenariosHomework!
Our strategy for UI testingChoosing the right tests for the UIThe testing architecture
Finding and interacting with elementsComplex UI interactionInjecting scriptsCommand control flowsTaking screenshotsWorking with several tabs and frames
The setupThe test HTML pageServing the HTML page and scriptsUsing browserify to pack our codeCreating a WebDriver sessionTesting whether our view updates the HTMLTesting whether our view reacts with the userWhat about our UI control logic?
Introducing the Page Object patternBest practices for page objects
Building a page object that reads the DOMBuilding a page object that interacts with the DOMTesting the navigation
Testing in several browsers with WebDriverTesting with PhantomJSRunning in several browsersThe Selenium Server
Running the tests in parallelOther useful configuration optionsUsing the Protractor API
Writing good test doubles
Testing against a databaseAccessing the DB directlyTreating the DAO as a collectionTesting against a third-party systemThe record-and-replay testing pattern
TDD versus BDD
BDD versus integration testingBDD is for testing problem domains

Overview

Behavior-driven development (BDD) is a powerful software development approach, and this book provides a comprehensive guide to implementing BDD using JavaScript. Whether you're a seasoned developer or new to testing, this book walks you through the concepts and tools systematically, from the basics to advanced topics.

What this Book will help me do

Understand BDD compared to traditional testing approaches and grasp its core principles.
Develop and structure testable JavaScript modules for efficient code testing.
Use popular JavaScript testing tools like Mocha, Chai, and Sinon effectively to write and maintain tests.
Implement behavior-descriptive testing scenarios using Cucumber.js and the Gherkin language.
Learn best practices for testing web applications, asynchronous code, and APIs.

Author(s)

Enrique Javier A Rubio is an experienced JavaScript software developer and tutor with deep expertise in behavior-driven testing frameworks. He believes in breaking down complex concepts and presenting them in an engaging and practical way to the developer community.

Who is it for?

If you are a JavaScript developer looking to enhance your testing expertise, this book is perfect for you. It is written for developers who want to learn the advantages of Behavior-Driven Development. The book suits beginners and mid-level developers with little to no prior testing experience. By completing it, you'll grasp testing JavaScript applications with confidence.