Rstest Best Practices

This is a comprehensive reference for writing and maintaining Rstest test suites, covering everything from basic test APIs to advanced CI and performance tuning. You'll want this when setting up a new Rstest project, debugging flaky tests, or optimizing slow test runs. It includes adapter patterns for Rsbuild and Rslib, proper async assertion patterns (using resolves/rejects matchers instead of try/catch), and practical advice on sharding for parallel CI execution. The coverage of multi-project monorepo setup and the debugging section with Rsdoctor profiling tips are especially useful. One caveat: it assumes you're already committed to the Rstest ecosystem rather than comparing it to alternatives.