# Testing Patterns in the Multica Codebase: Go, Vitest, and Playwright

> Discover the Multica codebase's three-tier testing strategy. Learn how Go, Vitest, and Playwright are used for robust HTTP handler, React component, and end-to-end testing.

- Repository: [multica-ai/multica](https://github.com/multica-ai/multica)
- Tags: testing-patterns
- Published: 2026-04-11

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**The Multica repository employs a three-tier testing strategy using Go's standard library for HTTP handlers, Vitest with jsdom for React components, and Playwright for end-to-end validation.**

The multica-ai/multica project maintains reliability across its full-stack architecture through distinct testing layers. Understanding the specific patterns in [`server/internal/handler/handler_test.go`](https://github.com/multica-ai/multica/blob/main/server/internal/handler/handler_test.go), [`apps/web/vitest.config.ts`](https://github.com/multica-ai/multica/blob/main/apps/web/vitest.config.ts), and the `e2e/` directory is essential for contributing effectively to the codebase.

## Go Backend Testing Patterns

Go tests in Multica focus on HTTP