Monday & #ReactNative 💙 #iOS #Android #mobile #apps #DevOps #software

Monday & #ReactNative 💙 


#iOS #Android #mobile #apps #DevOps #software

  • That’s why, today I’d like to share a number of things that boost my productivity while creating mobile app in React Native.
  • Storybook allows you to create stories in which you prepare pre filled UI elements with data that could possibly show up there during normal app lifetime.
  • Later within a few seconds you can easily go through all stories that you’ve described and see how they look on your device / emulator without the need of going through all of these states in normal app flow which takes much longer time.
  • This is a tiny example of a single story, however if you develop a normal app, you will surely have much more of them which may cover all of possible UI states for your components.
  • If your app grows, it’s easy to guess that tests will not run in a matter of milliseconds, but it’s still normal to have a result of them within 1-3 seconds from the time that you saved your file.

A developer needs tools that support her/his workflow to be fully productive. Well, I guess that this statement fits to any profession that you can think of. It is really important for me to feel that the environment that I’m working in really supports my flow and works well with my approach to software development.
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#iOS #Android #mobile #apps #DevOps #software”

Jest 15.0: New Defaults for Jest · Jest

@marekpiechut Mind updating this part? Jest does *not* mock by default anymore.

  • It can now switch between running all tests or only test files related to changed files by pressing a or o .
  • Jest now uses verbose mode when only a single test file is executed.
  • By pressing p a prompt appears that allows to specify a test pattern to focus on a specific set of files.
  • Jest used to implicitly reset all modules before each test and we recommended requiring modules in beforeEach or inside of tests.
  • When running multiple tests in parallel, it was often hard to find out which test and which module was calling a log function.

We spent the past year making Jest faster, easier to configure, added tons of features and built snapshot testing. However, there were two areas where we invested very little: the CLI output and user experience. With Jest 15 we are changing the framework radically to make it easier to use both for beginners and experienced users. We are excited that our investment in Jest is now paying off: we can move fast and improve the framework for Facebook and the open source community at light-speed. Jest’s goal is to come with batteries included and to require as little configuration as necessary. We recently got a chance to explain our philosophy on a create-react-app issue.
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