book

Node Cookbook - Fourth Edition

by Bethany Griggs

November 2020

Intermediate to advanced

512 pages

8h 58m

English

Packt Publishing

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Fourth EditionWhy subscribe?ContributorsAbout the authorAbout the reviewerPackt is searching for authors like you
Who this book is forWhat this book coversTo get the most out of this bookDownload the example code filesDownload the color imagesConventions usedGet in touchReviews
Technical requirements Installing Node.js 14 with nvmGetting readyHow to do it…How it works…There's more…See alsoAccessing the Node.js API documentationGetting readyHow to do it…How it works…There's more…Adopting new JavaScript syntax in Node.js 14Getting readyHow to do it…How it works…
Technical requirements Handling standard I/OGetting readyHow to do itHow it worksSee alsoManaging files with fs moduleGetting readyHow to do itHow it worksThere's moreSee alsoInspecting file metadataGetting readyHow to do itHow it worksThere's moreSee alsoWatching for file updatesGetting readyHow to do itHow it worksSee alsoCreating TCP server and client communicationGetting readyHow to do itHow it worksThere's more
Technical requirements Creating streams in Node.jsGetting readyHow to do it…How it works…There's more…See alsoInteracting with paused streamsGetting readyHow to do it…How it works…See alsoPiping streamsGetting readyHow to do it…How it works…There's more…See alsoTransforming data with transform streamsGetting readyHow to do it…How it works…There's more…See alsoBuilding stream pipelinesGetting readyHow to do it…How it works…There's more…See also
Technical requirementsUsing http module to make HTTP requestsGetting readyHow to do it…How it works…There's more…See alsoBuilding an HTTP server to accept GET requestsGetting readyHow to do it…How it works…There's more…See alsoHandling HTTP POST requestsGetting readyHow to do it…How it works…There's more…See alsoUsing formidable to handle file uploadsGetting readyHow to do it… How it works…There's more…See alsoUsing ws to create a WebSocket serverGetting readyHow to do it…How it works…There's more…See alsoSending an automated email using your own SMTP serverGetting readyHow to do it…How it works…There's more…See also
Technical requirementsConsuming Node.js modulesGetting readyHow to do itHow it worksThere's moreSee alsoSetting up your own moduleGetting readyHow to do itHow it worksThere's moreSee alsoImplementing your moduleGetting readyHow to do itHow it worksThere's moreSee alsoPreparing and publishing your module to npmGetting readyHow to do itHow it worksThere's moreUsing ECMAScript modulesGetting readyHow to do itHow it worksSee also
Technical requirementsBuilding web applications with Express.jsGetting readyHow to do itHow it works…There's more…See alsoBuilding web applications with Koa.jsGetting readyHow to do itHow it works…There's more…See also…Building web applications with FastifyGetting readyHow to do itHow it works…There's more…See also…Building web applications with HapiGetting readyHow to do itHow it works…There's more…See also…
Technical requirements Connecting and persisting to a MySQL databaseGetting readyHow to do it…How it works…There's more…See alsoConnecting and persisting to a PostgreSQL databaseGetting readyHow to do it…How it works…There's more…See alsoConnecting and persisting to MongoDBGetting readyHow to do it…How it works…There's more…See alsoPersisting data with RedisGetting readyHow to do it…How it works…There's more…See alsoPersisting data with LevelDBGetting readyHow to do it…How it works…There's more…See also
Technical requirements Testing with tapeGetting readyHow to do itHow it worksSee alsoTesting with MochaGetting readyHow to do itHow it worksThere's moreSee alsoTesting with JestGetting readyHow to do itHow it worksThere's moreSee alsoStubbing HTTP requestsGetting readyHow to do itHow it worksSee alsoUsing PuppeteerGetting readyHow to do itHow it worksThere's moreSee alsoConfiguring Continuous Integration testsGetting readyHow to do itHow it worksThere's moreSee also

Technical requirements Detecting known dependency vulnerabilitiesGetting readyHow to do it…How it works…See alsoAuthentication with Express.jsGetting readyHow to do it…How it works…There's more…See alsoSetting HTTP headers with HelmetGetting readyHow to do it…How it works…There's more…See alsoProtecting against HTTP parameter pollution attacksGetting readyHow to do it…How it works…There's more…See alsoPreventing JSON pollutionGetting readyHow to do it…How it works…See alsoPreventing cross-site scripting attacksGetting readyHow to do it…How it works…There's more…See alsoGuarding against cross-site request forgery attacksGetting readyHow to do it…How it works…There's more…See also
Technical requirements Benchmarking HTTP requestsGetting readyHow to do it…How it works…There's more…See alsoInterpreting flame graphsGetting readyHow to do it…How it works…There's more…See alsoDetecting memory leaksGetting readyHow to do it…How it works…There's more…See alsoOptimizing synchronous functionsGetting readyHow to do it…How it works…See alsoOptimizing asynchronous functionsGetting readyHow to do it…How it works…See alsoWorking with worker threadsGetting readyHow to do it…How it works…
Technical requirements Generating a microservice with LoopBackGetting readyHow to do it…How it works…There's more…See alsoConsuming a microserviceGetting readyHow to do it…How it works…See alsoHandling errorsGetting readyHow to do it…How it works…There's more…See alsoBuilding a Docker containerGetting readyHow to do it…How it works…There's more…See alsoPublishing a Docker imageGetting readyHow to do it…How it works…There's more…See alsoDeploying to KubernetesGetting readyHow to do it…How it works…There's more…See also
Technical requirements Diagnosing issues with Chrome DevToolsGetting readyHow to do itHow it worksThere's moreSee alsoLogging with Node.jsGetting readyHow to do itHow it worksThere's moreSee alsoEnabling debug logsGetting readyHow to do itHow it worksThere's moreSee alsoEnabling Node.js core debug logsGetting readyHow to do itHow it worksSee alsoIncreasing stack trace sizeGetting readyHow to do itHow it worksThere's moreSee alsoCreating diagnostic reportsGetting readyHow to do itHow it worksSee also
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Content preview from Node Cookbook - Fourth Edition

Chapter 8: Testing with Node.js

Testing enables you to identify bugs in your code more quickly and efficiently. Test cases should be written to verify that each piece of code is yielding the expected output or results. Tests can act as a form of documentation for the logic of your program.

Unit testing is a specific type of testing where individual components or units of code are tested. Small unit tests provide a granular specification for your program to test against. Ensuring your code base is covered by unit tests aids the development, debugging, and refactoring process by providing a baseline measure of quality that you can work off of. Having a comprehensive test suite can lead to identifying bugs sooner, which can save time and money ...