Modern JavaScript Testing: Integration, Contract Testing & AI Tools - JSJ 692

Modern JavaScript Testing: Integration, Contract Testing & AI Tools - JSJ 692

In this episode of JavaScript Jabber, I sit down with Dan Shapir and our special guest, Yoni Goldberg, to dive deep into the ever-evolving world of JavaScript testing. Yoni, a consultant who’s worked with over 40 organizations to refine developer workflows, shares valuable lessons learned from helping teams design efficient and reliable tests.

We explore emerging trends in testing, including the rise of browser-based test runners, the shift from unit testing toward more integration and component testing, and how modern frameworks like Playwright, Vite Test Browser Mode, and Storybook are changing the way developers think about confidence in their code. We also tackle the role of AI in writing and maintaining tests, the pros and cons of mocking vs. real backends, and why contract testing is becoming essential in 2025.

If you’ve ever struggled with flaky end-to-end tests, wondered how to balance speed with confidence, or wanted a clear breakdown of modern testing tools, this conversation will give you practical insights and fresh perspectives to take back to your projects.

Links & Resources

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JSJ 458: Codota Tabnine and the Rise of Ai-powered Developer Tooling with Kyle Simpson

JSJ 458: Codota Tabnine and the Rise of Ai-powered Developer Tooling with Kyle Simpson

Imagine a world in which your editor / IDE can actually write some of your code for you. Where you’re able to produce software faster and more efficiently because your development environment “knows” what you want to do, based on code you’ve written before. Turns out you can start experiencing this in the present using the free TabNine editor extension by Codata. In this episode Kyle Simpson, Codata’s Lead of Developer Empowerment, joins the panel to describe how they use Machine Learning to enhance and accelerate software development. Kyle explains what’s already possible in the present, and what ML technology promises to enable in the future for developer experience.SponsorsRaygun | Click here to get started on your free 14-day trialAudible.comCacheFlyPanelAJ ONealAimee KnightDan ShappirSpecial GuestKyle SimpsonLinkstabnine AI autocomplete with Vim (REACTION)How To Write Unmaintainable CodePicksAimeeTerraform cost estimationAJ3-Wolf MoonWatchexecDotenvKyle SimpsonIntroducing: The Async Cookie Store API Follow JavaScript Jabber on Twitter: @JSJabber Special Guest: Kyle Simpson.Sponsored By:Raygun: Raygun now offers Real User Monitoring of Core Web Vitals. Start your 14-day free trial now.Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

17 Nov 202057min

JSJ 457: Career Transitioning with Laura Harvey

JSJ 457: Career Transitioning with Laura Harvey

This week the panel talks with a UK boot camp student about her decision to switch careers and learn to program. They discuss unique challenges such as being part of an underrepresented group and entering the field during a pandemic. Additionally, they discuss technology choices and overall, seek to gain a deeper understanding of the state of JavaScript for new developers.SponsorsRaygun | Click here to get started on your free 14-day trialAudible.comCacheFlyPanelAimee KnightDan ShappirSteve EdwardsSpecial GuestLaura HarveyPicksAimeeGoReleaserhttps://www.purpose.jobs/blog/hiring-tech-jobs-has-increased-in-midwestern-citiesDanTechnical Tweetstwitter.com/kentcdodds/statusLaura Harveyhttps://www.youtube.com/channel/lauracharveyhttps://dev.to/lauracharvey Follow JavaScript Jabber on Twitter: @JSJabber Special Guest: Laura Harvey.Sponsored By:Raygun: Raygun now offers Real User Monitoring of Core Web Vitals. Start your 14-day free trial now.Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

10 Nov 202057min

JSJ 456: Developer-First Security and Security Tooling For Developers with Liran Tal & Brian Vermeer

JSJ 456: Developer-First Security and Security Tooling For Developers with Liran Tal & Brian Vermeer

Liran Tal and Brian Vermeer from Snyk join the panel to discuss development of secure software in general, and secure JavaScript and web dev in particular. They explain what developer-first security actually means, and the types of security vulnerabilities to watch out for when using modern tools to develop websites and web apps. They also present several Open Source tools that developers can use to improve their code right from within their favorite development environments and IDEs.SponsorsAudible.comCacheFlyPanelAJ ONealAimee KnightDan ShappirSpecial GuestsLiran TalBrian VermeerLinksHttps://www.webpagetest.orghttps://snyk.io/security-scanner-vuln-cost/https://marketplace.visualstudio.com/items?itemName=wix.vscode-import-costPicksDanadd Alt Texts when tweeting code on twitter as an image,https://www.goodreads.com/series/46817-demon-cycleAJZalgohttps://www.cnet.com/news/the-shirt-with-the-most-incredible-amazon-reviews/The Friendly, Interactive ShellTomorrow Night Theme (Terminal, iTerm2, VSCode, vim, etc)Dracula Themehttps://github.com/JacksonGariety/toy-chest-themeJeff BezosLiran Talhttps://starship.rs/https://vuetifyjs.com/en/Pact frameworkhttps://docs.pact.io/https://en.wikipedia.org/wiki/RemoteAccessBrianhttps://carbon.now.sh/https://en.wikipedia.org/wiki/The_Umbrella_Academy_(TV_series) Follow JavaScript Jabber on Twitter: @JSJabber Special Guests: Brian Vermeer and Liran Tal. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

3 Nov 20201h 6min

JSJ 455: Introducing and Understanding Svelte and Sapper with Mark Volkmann

JSJ 455: Introducing and Understanding Svelte and Sapper with Mark Volkmann

This week the panel is joined by Mark Volkmann to discuss Svelte and how it compares and differs from front-end frameworks such as React and Angular. Mark has written a book and has given talks about Svelte and also about Sapper, an application framework built on top of Svelte. He explains to the panel how Svelte components are defined differently than other JavaScript frameworks, and how they are actually compiled into the production code, which isn’t dependent on any external libraries. He also explains why and how Svelte forgoes the use of a virtual DOM, using direct DOM manipulations instead. Finally he describes Sapper and explains how it can be used to quickly and easily create Web-apps that use SSR, static pages generation and dynamic routing.SponsorsFaithlife | Now Hiring Software DevelopersRaygun | Click here to get started on your free 14-day trialAudible.comCacheFlyPanelAimee KnightDan ShappirSteve EdwardsSpecial GuestMark VolkmannLinkshttps://github.com/sveltejs/svelte/issues/2546https://mvolkmann.github.io/blog/https://objectcomputing.com/resources/publications/mark-volkmannhttps://www.manning.com/books/svelte-and-sapper-in-actionPicksSteveKey Largohttps://gbdeclaration.org/AimeeLow Level AcademyTerraform Up and RunningDanMy daughter enlisting in the Israeli Militarywww.amazon.com/The-Boys-Season-1Mark Volkmannhttps://www.meteor.com/https://mvolkmann.github.io/blog/ Follow JavaScript Jabber on Twitter: @JSJabber Special Guest: Mark Volkmann.Sponsored By:Raygun: Raygun now offers Real User Monitoring of Core Web Vitals. Start your 14-day free trial now.Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

27 Okt 202056min

JSJ 454: Mongoose, Mongo and Object Document Mapping (ODM) with Valeri Karpov

JSJ 454: Mongoose, Mongo and Object Document Mapping (ODM) with Valeri Karpov

We talk about the Pros and Cons of using a database directly vs using an abstraction layer, common mistakes, optimistic concurrency, and a nice tangent into programming concurrency models to top it off.SponsorsFaithlife | Now Hiring Software DevelopersAudible.comCacheFlyPanelAJ ONealAimee KnightCharles Max WoodSteve EdwardsSpecial GuestValeri KarpovLinkshttps://en.wikipedia.org/wiki/Aspect-oriented_programminghttps://mongoosejs.com/PicksStevehttps://cesf.us/AimeeThe Cloud Girl Sketch NotesAJGraphQurlAPC UPS with USBCyberPower UPSGoogle Lighthouse overstepFrog ChessWSL (Windows Subsystem for Linux)Chuckhttp://podcastgrowthsummit.co/http://podcastplaybook.co/mostvaluable.devStormlight ArchiveValeri Karpovhttps://masteringjs.io/ebooks/mastering-mongoose-javascript-jabberhttps://www.npmjs.com/package/archetypeamazon.com/Cryptonomicon-Neal-Stephenson Follow JavaScript Jabber on Twitter: @JSJabber Special Guest: Valeri Karpov. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

20 Okt 202054min

JSJ 453: Debugging Third Party JavaScript with Ben Vinegar

JSJ 453: Debugging Third Party JavaScript with Ben Vinegar

Podcast: Play in new window | Download Many websites these days have to deal with the reality of incorporating third-party scripts. These could be tracking scripts or analytics or monitoring, or even scripts that add explicit features to a site, such as chat. Regardless of the purpose, such scripts add complexity and overhead, and can interfere with the proper operation of the site. In this episode Ben Vinegar, VP of engineering at Sentry, joins the panel to discuss the complexities and implications of third-party scripts, both from the perspective of website developers, as well as from the perspective of the developers creating such scripts.SponsorsFaithlife | Now Hiring Software DevelopersRaygun | Click here to get started on your free 14-day trialAudible.comCacheFlyPanelAJ ONealAimee KnightDan ShappirCharles Max WoodSpecial GuestBen VinegarLinksETAG Cookieshttps://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_custom_elementsPicksAimeehttps://github.com/hwayne/awesome-cold-showersAJAJQuery v2.0https://webinstall.dev/sdDropbox PaperWoody Zuill on Mob Programming and Influencing Change | Healthy Developer Interview #4Charles Max WoodScythehttps://www.thecreepyline.com/Ben Vinegarhttps://workers.cloudflare.com Follow JavaScript Jabber on Twitter: @JSJabber Special Guest: Ben Vinegar.Sponsored By:Raygun: Raygun now offers Real User Monitoring of Core Web Vitals. Start your 14-day free trial now.Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

13 Okt 202016min

JSJ 452: Caddy 2 Web Server with Matthew Holt

JSJ 452: Caddy 2 Web Server with Matthew Holt

Today the panel talks with Matt Holt who works full time on the Caddy Web Server. The panel discusses things such as how it compares to other popular tools as well as lessons learned while working on it.SponsorsFaithlife | Now Hiring Software DevelopersThe Complete Software Developer’s Career Guide – Grab a Copy TodayAudible.comCacheFlyPanelAJ ONealAimee KnightCharles Max WoodSpecial GuestMatthew HoltLinkshttps://www.papaparse.com/OSI modelhttps://apilayer.com/https://github.com/mholtPicksAimeeCloud flare ball indication sectionLearning about other culturesAJhttps://webinstall.dev/caddy/https://webinstall.dev/serviceman/https://insights.stackoverflow.com/survey/2020https://www.beyondcodebootcamp.com/CharlesMost Valuable Programmer (MVP Program)https://podcastplaybook.coLightbringer seriesMatthew HoltSourcegraph Follow JavaScript Jabber on Twitter: @JSJabber Special Guest: Matthew Holt. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

6 Okt 20201h 12min

JSJ 451: Are Software Bugs Inevitable with Ran Levi

JSJ 451: Are Software Bugs Inevitable with Ran Levi

Ran Levy, a well known and prolific technology podcaster joins the show to talk with the panel about software bugs. Topics of discussion include the inevitability of software bugs – are they an intrinsic part of software development? Also, can they be minimized and their impact mitigated? And what can software companies, and the developers themselves, do in order to deliver properly working software.SponsorsRaygun | Click here to get started on your free 14-day trialThe Complete Software Developer’s Career Guide – Grab a Copy TodayFaithlife | Now Hiring Software DevelopersCacheFlyPanelCharles Max WoodAJ ONealAimee KnightDan ShappirSteve EdwardsSpecial GuestRan LeviLinksAre Software Bugs Inevitable?The Wix Engineering PodcastPicksDanThe Explosion of the Ariane 5Mars Climate OrbiterAJMagic Keyboard & Trackpad 2Final Fantasy 1GameCube + GBA + HDMIHomebrew GuideCharles Max WoodMUDList of MUDs Follow JavaScript Jabber on Twitter: @JSJabber Special Guest: Ran Levi.Sponsored By:Raygun: Raygun now offers Real User Monitoring of Core Web Vitals. Start your 14-day free trial now.Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

29 Sep 20201h 19min

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