What is Snapper-io?
Snapper is an open-source visual regression testing tool designed for testing web and mobile applications. It works by taking screenshots of your app UI and comparing them against baseline screenshots to detect any unintended changes or regressions.
Some key features of Snapper include:
- Cross-browser screenshot testing - Supports all major browsers like Chrome, Firefox, Safari
- Device emulation - Emulate screenshots for mobile devices, tablets, laptops etc.
- Visual diffing - Pixel by pixel comparision to spot subtle UI changes
- CI/CD integrations - Integrate easily with tools like Jenkins, CircleCI, TravisCI etc.
- Annotations - Annotate screenshots to ignore dynamic/non-important areas
- Bulk approvals - Review and approve hundreds of screenshots with one click
- Shareable HTML reports - Beautiful test reports that can be shared with stakeholders
Overall, Snapper speeds up front-end testing and release management by catching UI bugs early. Its flexibility makes Snapper a great open-source alternative for visual regression testing of web and mobile apps.