Testing Strategies Patterns

Overview

Testing strategy is about deciding where confidence should come from. Strong teams do not try to prove everything with one kind of test. They distribute risk across fast local checks, realistic integration tests, and a smaller number of end-to-end flows.

Modern tooling has improved this significantly. Tools like Vitest, Playwright, Testing Library, Cypress, Storybook, MSW, and contract-testing frameworks make it practical to build layered test suites that are both fast and credible.

The Goal

The goal is not "maximum coverage" in the abstract. The goal is:

• catch regressions early
• keep feedback loops fast
• test behavior at the right layer
• avoid brittle tests that slow delivery

Test Layers