Testing
TDD: When It Works and When It Gets in the Way
An honest assessment of test-driven development - the contexts where writing tests first genuinely improves code design, and the ones where it adds friction without benefit.
Testing
Test Doubles: Mock, Stub, Spy, Fake - the Real Differences
What each type of test double actually is, when to use each one, and how to avoid the trap of over-mocking tests into uselessness.
Testing
Writing Unit Tests That Actually Catch Bugs
What separates a unit test that catches real regressions from one that only verifies your test setup - and how to write tests that stay useful as code changes.
Testing
The Testing Pyramid: Why Balance Matters More Than Coverage
What unit, integration, and end-to-end tests are actually good for, and how to find the right mix so your test suite catches real bugs without being a maintenance burden.