React Server Components (RSC) are revolutionizing how applications render by executing as async functions on the server, not the client. Testing them requires a nuanced approach, and this tutorial guides you through building a robust testing strategy. We'll explore the three-tier approach, Vitest environment configuration, rendering async server components, mocking boundaries, testing suspense boundaries, and the integration vs. E2E test decision heuristic. By the end, you'll have a comprehensive understanding of how to effectively test RSCs, ensuring your applications are both functional and reliable.
