November 2018
Beginner
502 pages
10h 22m
English
Content preview from Learn React with TypeScript 3
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Understanding Jest watch options
After Jest executes our tests, it provides us with the following options:
> Press f to run only failed tests.> Press o to only run tests related to changed files.> Press p to filter by a filename regex pattern.> Press t to filter by a test name regex pattern.> Press q to quit watch mode.> Press Enter to trigger a test run.
These options let us specify what tests should be executed, which is really useful as the number of tests grows. Let's explore some of these options:
- If we press F, Jest will execute only the tests that have failed. In our code, we get confirmation that we have no failing tests:
- Let's ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.