Snapshot testing in React captures component output and compares it against stored snapshots to catch unexpected UI changes. As the creator of CoreUI, I’ve used snapshot tests extensively to prevent UI regressions. Jest provides built-in snapshot testing that creates readable snapshots of React component trees and markup. This approach catches unintended changes in component structure, props, and rendered output without manual assertions.

Snapshot testing captures the output of functions or API responses and compares them to stored snapshots to detect unexpected changes. As the creator of CoreUI, I’ve used snapshot tests to catch regressions in APIs. Jest provides built-in snapshot testing that creates readable, version-controlled snapshots of complex data structures and responses. This approach catches unexpected changes in data formats, API responses, and object structures without manual assertions.