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💀Don't Break UI with Jest Snapshot Testing 📷
- Making structural changes in code without considering UI states like :hover or :focus can break the UI, even if tests pass.
- Jest Snapshot testing can help avoid breaking UI by capturing expected UI states and structures in snapshots.
- Snapshot testing is crucial for ensuring that small changes do not unintentionally impact the UI.
- Snapshot testing compares rendered output with reference snapshots to detect unexpected changes.
- Snapshots serve as a reference point for UI elements, alerting developers to any deviations.
- Regularly updating snapshots when intentional UI changes are made ensures consistency in UI representation.
- It is essential to write effective snapshot tests focusing on specific components or parts of the UI for better maintenance.
- Snapshot testing is particularly useful for smaller, isolated components to track visual changes efficiently.
- Consider using modern testing tools like Cypress component testing, visual testing, or Vitest with Playwright for comprehensive testing.
- Snapshot testing, alongside other testing methodologies, adds a layer of safety to ensure the application's visual integrity.
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