Catching API regressions with snapshot testing
4 months ago
- #API Testing
- #Snapshot Testing
- #Software Development
- Snapshot testing captures a system's output as a baseline for future comparisons.
- It's useful for API testing to avoid writing extensive assertions for large JSON/XML payloads.
- Benefits include fast test creation, comprehensive coverage, and simplified code reviews.
- Pitfalls involve dynamic data like timestamps and UUIDs, which can cause false negatives.
- Snapshot fatigue can occur if tests fail frequently, leading to ignored failures.
- Practical example using Kreya shows how to implement snapshot testing for APIs.
- Snapshot testing is not a replacement for all tests but offers high ROI for complex API payloads.