Testing
"It works on my machine" is one of the oldest complaints in software development. With tests, the equivalent is "it passes locally but fails in CI." This pattern has specific, identifiable causes — and fixing them systematically makes your test suite dramatically more reliable. Why CI Is
Testing
Flaky tests are tests that pass sometimes and fail sometimes without any code changes. They're among the most damaging problems in a test suite — they erode trust in the entire test suite, slow down CI pipelines, and hide real failures behind noise. If your team regularly reruns tests
Testing
Distributed systems fail in ways you don't expect. Chaos engineering is the practice of intentionally introducing failures into your system to discover weaknesses before they cause production incidents. For microservices, it's not optional — it's how you gain confidence that your system actually works under
Compliance Testing
The EU AI Act's full obligations for high-risk AI systems take effect in August 2026. If you're building AI-powered products in hiring, credit, healthcare, or similar domains, you need a concrete testing strategy right now — not a legal strategy, an engineering one. This guide
Testing
Snapshot tests are one of those testing tools that developers either overuse or underuse. They get added to every component by default, then blindly updated whenever tests fail — or they get avoided entirely by teams burned by maintenance overhead. The answer is in the middle: snapshot tests are genuinely useful
Testing
Snapshot testing works seamlessly in a local development environment but introduces specific challenges in CI/CD pipelines: snapshots may differ across operating systems, developers can't run jest -u in CI, and snapshot updates need to make it into the repository without blocking deployments. This guide covers the patterns
Testing
Snapshots that start as a safety net often become a maintenance burden. Test files fill with .snap files that nobody reviews. Developers run jest -u reflexively when tests fail. The snapshots grow to thousands of lines covering third-party component internals. This guide covers the practices that keep snapshot tests
Testing
Snapshot testing is one of Jest's most misunderstood features. Used well, it prevents accidental UI regressions with almost zero effort. Used poorly, it becomes a maintenance burden that developers mindlessly update without thinking. This guide covers everything React developers need to know about Jest snapshot testing — from the
Testing
Using production data in test environments is one of the most common compliance violations in software engineering — and one of the easiest to prevent. Test data masking and anonymization are the tools that let your QA team work with realistic data while keeping regulators and auditors satisfied. This guide explains
Testing
Test data management is the invisible backbone of every reliable test suite. Get it right and your tests are fast, deterministic, and easy to maintain. Get it wrong and you spend more time debugging flaky data than fixing actual bugs. This guide covers the best practices QA teams use to
Testing
As engineering teams grow, test environment management becomes one of the biggest bottlenecks to shipping fast. Shared environments become contention points. Data gets corrupted. The QA environment drifts from production. Someone always needs the staging server at the wrong time. This guide covers the strategies, tools, and architecture decisions that
Testing
"Test data as code" is the practice of managing test data with the same rigor as application code — version controlled, reviewed, and deployed through your CI/CD pipeline. It's the natural extension of infrastructure as code and configuration as code into the testing layer. When test