Vue Testing Best Practices

Vue.js testing best practices, patterns, and common gotchas.

Testing

• Setting up test infrastructure for Vue 3 projects → See testing-vitest-recommended-for-vue
• Tests keep breaking when refactoring component internals → See testing-component-blackbox-approach
• Tests fail intermittently with race conditions → See testing-async-await-flushpromises
• Composables using lifecycle hooks or inject fail to test → See testing-composables-helper-wrapper
• Getting "injection Symbol(pinia) not found" errors in tests → See testing-pinia-store-setup
• Components with async setup won't render in tests → See testing-suspense-async-components
• Snapshot tests keep passing despite broken functionality → See testing-no-snapshot-only
• Choosing end-to-end testing framework for Vue apps → See testing-e2e-playwright-recommended
• Tests need to verify computed styles or real DOM events → See testing-browser-vs-node-runners
• Testing components created with defineAsyncComponent fails → See async-component-testing
• Teleported modal content can't be found in wrapper queries → See teleport-testing-complexity

Reference

• Vue.js Testing Guide
• Vue Test Utils
• Vitest Documentation
• Playwright Documentation