June 2019
Intermediate to advanced
192 pages
4h
English
Content preview from Test-Driven React
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Testing Nested Markup
So far, we’ve used React to encapsulate the functionality of a single DOM element (<button>) in a component (CarouselButton). But React components are capable of doing more than that. Next, we’ll build the CarouselSlide component, which will be responsible for rendering several distinct DOM elements:
- An <img> to display the actual image
- A <figcaption> to associate caption text with the image
- Text, some of which will be wrapped in <strong> for emphasis
- A <figure> to wrap it all up
We’ll take a TDD approach to building this tree while ensuring that the props we provide to CarouselSlide are routed correctly. Start by creating a “stub” of the component, a minimal implementation you can add functionality to later:
| | // src/CarouselSlide.js ... |
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