Testing · Senior · Question 71 of 75

Why might a senior engineer argue against a test suite full of `toMatchSnapshot()` for components?

✓Correct answer: Snapshots verify “nothing changed”, not “it's correct”; they get blindly updated and fail on harmless changes
2Snapshots can't be run in CI
3Snapshots don't work with TypeScript

Explanation

Snapshots fit serialized data (API mappers, error messages), not as a replacement for behaviour tests.

Further reading

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