Jest Setup
Explore how to configure Jest to run a single setup file for Enzyme in a React testing environment. Understand how this setup prevents duplication across multiple test files and ensures consistent test configuration. Learn best practices for organizing test-related files and adhering to appropriate linting rules to maintain clean and maintainable test code.
We'll cover the following...
Adding a Jest setup file
Since this chapter’s project will have three components (Carousel, CarouselButton, and CarouselSlide), it’s going to have three test files. Rather than duplicate the Enzyme configuration logic across all three, we should move that logic into a “setup file” that will only run once whenever Jest runs our tests.
Actually, we’re going to need two files. The setup file, and a Jest configuration to point to it. Let’s start with the configuration. By default, Jest looks for a file ...