How We Test a Feature Flag Platform: 1,192 Tests Across 13 SDKs
The article outlines the testing strategy for Rollgate, a feature flag platform, detailing how 1,192 tests across 13 SDKs ensure reliability and consistency. It breaks down the test pyramid into unit, integration, contract, and end-to-end layers, emphasizing the importance of deterministic behavior in flag evaluation. The author, Domenico Giordano, highlights key challenges such as consistent hashing, targeting rule accuracy, and real-time streaming resilience.
- ▪Rollgate uses 1,192 test cases across unit, integration, contract, and end-to-end testing layers to validate functionality and consistency.
- ▪The platform supports 13 SDKs across 7 programming languages and ensures consistent behavior through cross-SDK contract tests.
- ▪Consistent hashing is implemented using SHA-256 to ensure stable user bucketing for percentage rollouts across all SDKs.
- ▪The evaluation engine is rigorously tested for logic correctness, including distribution, consistency, and monotonicity in rollout behavior.
- ▪Stress tests confirmed the system can handle up to 28,000 concurrent Server-Sent Events connections on a single node.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 2672712) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Domenico Giordano Posted on May 1 • Originally published at rollgate.io How We Test a Feature Flag Platform: 1,192 Tests Across 13 SDKs #testing #featureflags #architecture #sdk This was originally published on rollgate.io/blog/how-we-test-rollgate. The Testing Problem No One Talks About Building a feature flag platform means building something that sits in the critical path of every request your customers serve.
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at DEV.to (Top).
Discussion
0 commentsMore from DEV.to (Top)
