Selfie: snapshot testing and memoizing for Java, Kotlin, and the JVM
Key features
- Just add a test dependency, zero setup, zero config.
- Snapshots can be inline literals or on disk.
- Use
expectSelfie
for testing or cacheSelfie
for memoizing expensive API calls.
- Disk snapshots are automatically garbage collected when the test class or test method is removed.
- Snapshots are just strings. Use html, json, markdown, whatever. No magic serializers.
- Record multiple facets of the entity under test, e.g. for a web request...
- store the HTML as one facet
- store HTML-rendered-to-markdown as another facet
- store cookies in another facet
- assert some facets on disk, others inline
- see gif above for live demo, detailed example here
JVM only for now, python is in progress, other platforms on the way: js, .NET, go, ...
Documentation
Contributing
PRs welcome! Horror stories and glory stories too, share your experience! See CONTRIBUTING.md
.
Acknowledgements
Heavily inspired by origin-energy's java-snapshot-testing, which in turn is heavily inspired by Facebook's jest-snapshot.