Vitest quiz

Test your Vitest knowledge with a free interactive quiz — 37 questions with answers and explanations. No signup needed to play.

What does the `environment` option in Vitest's config (e.g. `test: { environment: 'jsdom' }`) control?

1. What does the `environment` option in Vitest's config (e.g. `test: { environment: 'jsdom' }`) control?
2. What is `test.skip()` (or `it.skip()`) used for in Vitest?
3. What is the difference between `.toBe()` and `.toEqual()` as Vitest matchers?
4. What is `test.each()` (or `it.each()`) used for in Vitest?
5. What does `.toBeNull()` and `.toBeUndefined()` check, as Vitest matchers?
6. How would you test an asynchronous function (returning a Promise) with Vitest?
7. What is the purpose of `vi.fn()` in Vitest?
8. How does Vitest's configuration typically integrate with an existing `vite.config.ts` file?
9. What is Vitest?
10. What is the purpose of `.toThrow()` as a Vitest matcher?
11. How does Vitest's watch mode behave during active development?
12. What is a `.test.ts` (or `.spec.ts`) file naming convention used for with Vitest, by default?

More quizzes