Vue Testing Best Practices

This covers the practical testing scenarios you'll actually hit when building Vue 3 apps: async components that won't render, Pinia injection errors, flaky tests from race conditions, and the whole Vitest + Vue Test Utils + Playwright stack. The problem-first organization is smart because you can jump straight to "my composable tests are failing" instead of reading theory. It pushes you toward black-box testing over implementation details, which will save you refactoring pain later. The guidance skews opinionated (Vitest over Jest, avoid snapshot-only tests) but that's honestly what you want in a testing guide. If you're setting up testing infrastructure or debugging weird test failures in Vue, this will get you unstuck faster than piecing together Stack Overflow answers.