JSJ 411: Unit Testing Jest with Daniel Caldas
JavaScript Jabber10 Dec 2019

JSJ 411: Unit Testing Jest with Daniel Caldas

Daniel Caldas is calling from Singapore. He currently works as a software engineer for Zendesk and has also worked in Portugal and Germany. He has worked primarily on the frontend with Node and JavaScript. He talks about his experience testing JavaScript, how he got started with Jest, and why he likes it. Daniel finds Jest very easy to use and straightforward. He likes that Jest has a single reference page for documentation. He feels that Jest is largely complete out of the box and has only made a small add on to get rid of Boilerplate in some tests.Daniel explains what a snapshot, how they work, and why he prefers fixtures over factories. He gives tips on how to set up your tests so that they are easy to follow. He finds it helps to structure your scenarios in the fixture description. He talks about gotchas in Jest. While Jest is largely easy to use, Jest has been around for a while and breaking changes do happen. It’s important to check what version your code base is using. While there are a lot of free sources around Jest online, he advises listeners to stick as close to the official documentation as possible, or to people associated with Jest, and to read recent stuff. As for conventions, Jest has pretty much everything out of the box and the built in conventions make it easy to navigate any project that uses Jest.Daniel talks about some of the features available in Jest, converting observables into promises, and tricks he has used to make tests easier to put together. He talks about his method for keeping his mocks and stubs straight. He advises listeners to have some organizational rules, such as starting the imports alphabetically, and to always follow those rules. He talks about how he runs tests and what environments he uses. While Jest is normally used for unit testing, Daniel has also used it for end to end tests, and he talks about his experience with an open source project doing both types in Jest. Daniel concludes the show by advising listeners starting with JavaScript and frontend, don’t think too much about the library you’re going to use because you’ll probably end up using Jest. It’s more important to have unit tests and a proper testing framework at the beginning than anything else. He also invites listeners to check out his open source work on Github.Panelists
  • Aimee Knight
  • AJ O’Neal
  • Charles Max Wood
**To receive your 40% OFF coupon for Manning Publications (good for all our products in all formats) visit us on Facebook - click on "Send A Message"and type "YES"**Guest
  • Danile Caldas
Sponsors
  • Sentry | Use the code “devchat” for $100 credit
LinksPicksAimee Knight:AJ O’Neal:Charles Max Wood:Daniel Caldas:Special Guest: Daniel Caldas.

Support this podcast at — https://redcircle.com/javascript-jabber/donations

Privacy & Opt-Out: https://redcircle.com/privacy

Become a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

Avsnitt(734)

134 JSJ Quilljs with Jason Chen

134 JSJ Quilljs with Jason Chen

The panelists discuss Quilljs with its' creator, Jason Chen.Special Guest: Jason Chen. 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.

19 Nov 201439min

133 JSJ Remote Work with Mike Hostetler

133 JSJ Remote Work with Mike Hostetler

The panelists discuss remote work with Mike Hostetler.Special Guest: Mike Hostetler. 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.

12 Nov 201453min

132 JSJ MV Frameworks with Craig McKeachie

132 JSJ MV Frameworks with Craig McKeachie

The panelists talk about MV Frameworks with Craig McKeachie.Special Guest: Craig McKeachie. 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.

5 Nov 201458min

131 JSJ Conferences & Meetups with Dave Nugent

131 JSJ Conferences & Meetups with Dave Nugent

The panelists talk to Dave Nugent about organizing conferences and Meetups.Special Guest: Dave Nugent. 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 Okt 201424min

130 JSJ Browser Tools and Extensions

130 JSJ Browser Tools and Extensions

The panelists talk about browser tools and extensions. 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.

22 Okt 20141h 7min

129 JSJ BaaS with Ryan Done

129 JSJ BaaS with Ryan Done

The panelists talk backends as a service with Ryan Done.Special Guest: Ryan Done. 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.

8 Okt 201454min

128 JSJ Famo.us with Steve Newcomb

128 JSJ Famo.us with Steve Newcomb

The panelists talk about the famo.us framework with Steve Newcomb.Special Guest: Steve Newcomb. 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.

1 Okt 201455min

127 JSJ Changes in npm-Land with Forrest Norvell, Rebecca Turner, Ben Coe, and Isaac Z. Schlueter

127 JSJ Changes in npm-Land with Forrest Norvell, Rebecca Turner, Ben Coe, and Isaac Z. Schlueter

The panelists discuss changes in the npm package manager with Forrest Norvell, Rebecca Turner, Ben Coe, and Isaac Z. Schlueter.Special Guests: Ben Coe, Forrest Norvell, Isaac Schleuter, and Rebecca Turner. 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.

24 Sep 201456min

Populärt inom Business & ekonomi

badfluence
framgangspodden
varvet
rss-jossan-nina
uppgang-och-fall
bathina-en-podcast
rss-borsens-finest
dynastin
avanzapodden
svd-tech-brief
fill-or-kill
affarsvarlden
rss-svart-marknad
rss-inga-dumma-fragor-om-pengar
24fragor
rss-veckans-trade
ekonomiekot-extra
kapitalet-en-podd-om-ekonomi
tabberaset
market-makers