Snapshot testing is essential to detect unintended changes in our React components' rendering. By comparing the current output with a saved snapshot, we can ensure that our UI remains consistent and catch unexpected modifications.
It is crucial to treat snapshot files as a vital part of our testing process and commit them to our repository. Every time a component change affects the UI rendering, we may need to update the snapshot and include it in the codebase.
The React Testing Library is a popular tool for testing React components. It generates a document fragment that represents the current state of our component's rendered output, aiding in effective snapshot testing.
When using Jest for snapshot testing, the initial run creates a snapshot file with the component output. Subsequent runs compare modifications to this snapshot, prompting the need to update it if there are differences.
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