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17 articles
A practical guide to building a testing strategy that catches real bugs — unit, integration, and end-to-end tests with Vitest, Testing Library, and Playwright, plus the tradeoffs of each layer.
Implement dependency injection in TypeScript using constructor injection, factory functions, DI containers, and module-level composition patterns that improve testability and decouple components without framework lock-in.
Build reliable end-to-end test suites with Playwright using page object models, test isolation, network interception, visual regression testing, and CI integration patterns that catch real user-facing bugs without flaky failures.
Practical testing strategies for distributed architectures, covering contract testing between services, chaos engineering for resilience validation, integration test design, and building confidence in systems where end-to-end testing is impractical.
A practical guide to building evaluation pipelines for LLM-powered features covering semantic similarity metrics, behavioral testing, regression detection, and automated quality gates.
Practice chaos engineering by injecting controlled failures into production systems to discover weaknesses before they cause outages, with practical experiments covering network partitions, resource exhaustion, and dependency failures.
Build a robust feature flag system that supports gradual rollouts, user targeting, A/B testing, and kill switches, with practical patterns for flag lifecycle management that prevent technical debt accumulation.
Design and execute effective load tests using k6 with practical patterns for ramping strategies, realistic user simulation, threshold-based pass/fail criteria, and interpreting results to find bottlenecks before production traffic exposes them.
Learn how property-based testing generates hundreds of random inputs to verify code invariants, catching edge cases that hand-written example tests overlook with practical patterns in TypeScript using fast-check.
Design systematic evaluation pipelines for LLM-powered applications covering automated metrics, human evaluation protocols, regression testing, prompt versioning, and production monitoring for output quality.
Apply systematic refactoring strategies to legacy codebases using characterization tests, the strangler pattern, and incremental extraction to improve code quality without introducing regressions.
How to implement feature toggles that enable trunk-based development, gradual rollouts, and instant rollbacks — covering toggle types, testing strategies, and cleanup practices that prevent toggle debt.
How property-based testing finds edge cases your unit tests miss — a practical guide using fast-check to generate thousands of test inputs and verify invariants automatically.
A practical guide to load testing APIs — covering tool selection, realistic traffic patterns, performance baselines, bottleneck identification, and common mistakes.
Patterns for integration tests that are reliable, fast, and catch real bugs — covering database setup, API testing, and avoiding flaky test syndrome.
Chaos engineering is the practice of deliberately injecting failures into production systems to discover weaknesses before they cause real outages.
Dependency injection doesn't require a framework or decorators — here's how to apply it in TypeScript with simple patterns that make code testable and flexible.