Question

What are the current best practices for testing React components with Jest and Enzyme?

I'm writing tests for my React components and want to follow the best practices using Jest and Enzyme. What are the current recommended approaches?

Answer 1

Here are the current best practices for testing React components using Jest and Enzyme, based on the latest insights:

Use shallow rendering: For smaller components or when testing the component's offspring is not necessary, shallow rendering is typically quicker and more effective.

Use mount for more complex components: Use mount to make sure all children are rendered correctly when testing more complex components.

Steer clear of excessive use of simulate: Although it is an effective tool, simulate can cause your tests to run more slowly. Use it judiciously and only when necessary.

Use jest-dom for DOM-related tests: A collection of matchers created especially for testing DOM elements is offered by Jest-dom. Utilize them to create tests that are easier to read and more effective.

Write Snapshot Tests for UI Consistency:

Use Jest's snapshot testing feature to ensure your UI doesn’t change unexpectedly. Store snapshots in version control to identify unintended modifications during reviews. Update snapshots intentionally using jest -u when UI changes are deliberate