May 2019
Intermediate to advanced
496 pages
10h 38m
English
Content preview from Mastering React Test-Driven Development
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Duplicating fields
The Git tag for this section is duplicating-fields.
We've written a set of tests that fully define the firstName text field. We now want to add two more fields, which are essentially the same as the firstName field but with different id and labels.
Before you reach for the copy and paste, stop and think about the duplication you could be about to add to both your tests and your production code. We have six tests that define the first name. We'll end up with 18 tests to define three fields. That's a lot of tests without any kind of grouping or abstraction.
So, let's do both. Let's group our tests and abstract out a function that generates our tests for us.
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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.
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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.