QA Sphere Blog

A practical method for testing legacy code with no test suite: mapping risk, writing characterization tests, finding seams, approval testing, and where to spend the first ten tests.

Testing in production done responsibly: feature flags as a testing tool, canary releases with real promotion criteria, what observability gives QA, and the guardrails required first.

How consumer-driven contract testing catches microservice integration failures without running every service together. The Pact workflow, provider verification and can-i-deploy in CI.

A practical peak season QA checklist for e-commerce teams: the eight-week readiness timeline, checkout and payment paths, oversell testing, load profiles and code freeze rules.

How to test AI features in your product. Assert on non-deterministic output, build an eval set, calibrate an LLM judge, and catch regressions when the model changes.

Severity vs priority explained. What each one measures, who sets it, the four combinations that confuse teams, and how to run a triage meeting that ends in decisions.

Mobile app testing explained. Build a device coverage matrix from your own analytics, test interruptions, permissions and connectivity, and ship through store review.

Accessibility testing explained. What WCAG 2.2 Level AA requires, what the European Accessibility Act means for product teams, and a practical QA checklist.

Performance testing explained. Compare load, stress, soak, spike and volume testing, pick the right metrics, set thresholds, and read the results correctly.

Risk-based testing explained. Score impact and likelihood, build a risk matrix, map scores to test depth, and document what you deliberately will not test.