vitest-author

Structure Vitest tests by placing files under a tests/ directory using explicit imports, separating pure logic from database function testing, and applying interleaved data patterns to prevent test ordering artifacts.

Vitest test data ordering artifacts occur when sequential data setup introduces dependencies. Use the interleaved helper pattern to randomize or separate data, and double-check z-score math assertions to prevent calculation failures.

The best way to configure Vitest for JavaScript and TypeScript services is to follow project conventions by ensuring explicit imports, structuring test files properly, and running coverage checks with npx vitest run tests/.

Yes, you can use Vitest to test pure functions separately from database functions by structuring test files to isolate logic, ensuring explicit imports are present, and validating test coverage across service components.

Yes, you need explicit vitest imports like describe, it, and expect to run unit tests successfully. Missing these imports is a common pitfall that causes test failures when validating service coverage with npx vitest run tests/.