What is Jest snapshot testing?
An example of an AI chatbot conversation about Jest snapshot testing in JavaScript.
What is Jest snapshot testing?
Jest snapshot testing is a feature in Jest that allows you to capture the rendered output of a component and save it as a snapshot. This helps in ensuring that the UI does not change unexpectedly.
How do I create a snapshot in Jest?
To create a snapshot, you can use the toMatchSnapshot() method in your test. When you run the test, Jest will generate a snapshot file.
Can I update snapshots if they change?
Yes, you can update snapshots by running Jest with the -u or --updateSnapshot flag. This will overwrite the existing snapshots with the new output.
What are the benefits of using snapshot testing?
Snapshot testing helps catch UI changes, simplifies testing of complex components, and provides a clear history of changes over time.
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