The Testing Pyramid is a widely adopted strategy that helps teams design scalable, reliable, and maintainable test suites. As systems grow in complexity, so does the need for clear testing boundaries. The pyramid has evolved to include not just unit and end-to-end tests, but also component, functional, integration, and contract tests.

This post breaks down each layer, explains how it fits into a modern development workflow, and uses a car manufacturing analogy to make it all easier to understand.