Testing

Testing

Visual Regression Testing: Catching UI Bugs Automatically

A CSS change that looks fine locally can silently break your UI in production. Visual regression testing catches those changes automatically by comparing screenshots before and after every deployment.

Mar 12, 2026 6 min read

Testing

Test Data Management: Factories, Fixtures, and Seeding at Scale

Poor test data management causes slow tests, flaky tests, and tests that are impossible to understand. Here's how to build a test data strategy that stays maintainable as your codebase grows.

Mar 11, 2026 7 min read

Testing

Property-Based Testing: Finding Bugs Your Unit Tests Miss

Unit tests verify specific examples. Property-based tests verify that rules hold across hundreds of randomly generated inputs. The bugs they find are the ones you never thought to test for.

Mar 10, 2026 6 min read

Testing

Testing Microservices in Isolation: Stubs, Mocks, and Service Virtualization

When your service depends on five other services, how do you test it without standing up the entire system? Stubs, mocks, and service virtualization are the answer.

Mar 9, 2026 7 min read

Testing

End-to-End Testing Without the Pain: Patterns That Actually Scale

E2E tests have a reputation for being slow, brittle, and expensive to maintain. They don't have to be. Here's how to build an E2E suite that stays reliable as your codebase grows.

Mar 8, 2026 6 min read

Testing

Mutation Testing: The Metric That Exposes Weak Test Suites

Code coverage tells you which lines ran during tests. Mutation testing tells you whether your tests would actually catch a bug. The difference is significant.

Mar 7, 2026 2 min read

Testing

Contract Testing: Preventing API Breaking Changes Before They Hit Production

Contract testing makes your API agreements machine-verifiable, so breaking changes are caught before they reach production and crash your consumers.

Mar 6, 2026 7 min read

Testing

The Testing Pyramid in Practice: How Many Tests of Each Type You Actually Need

The testing pyramid tells you to write more unit tests than integration tests and more integration tests than E2E tests. But what does that actually look like in a real codebase?

Mar 5, 2026 7 min read

Performance Testing

Performance Testing Best Practices

Design meaningful performance tests. Create realistic load profiles, identify bottlenecks, and establish baselines.

Feb 26, 2026 3 min read

Development Testing

Code Quality Metrics That Matter

Measure code quality effectively. Track meaningful metrics, avoid vanity metrics, and improve team practices.

Feb 16, 2026 7 min read

Architecture Testing

Microservices Testing Pyramid

Build a testing strategy for microservices. Balance unit, integration, contract, and end-to-end tests effectively.

Jan 31, 2026 7 min read

Testing Infrastructure

Infrastructure Testing Strategies

Test your infrastructure code before deployment. Learn Terratest, InSpec, and policy testing with OPA.

Jan 14, 2026 7 min read