vitest

Developer Tools

Gives your agent the ability to write and run fast unit tests with Vite-native mocking and snapshots.

When to use

When writing unit or integration tests for a Vite-based project
When you need to mock complex modules, timers, or API calls in tests
When configuring code coverage reporting using V8 or Istanbul

How to use

1
Share the source code of the function or component you want to test
2
Ask the agent to generate a Vitest test suite with appropriate mocks
3
Run the vitest command to execute the tests in watch or CI mode
4
Review the coverage report to ensure all critical paths are tested

Example conversation

case

You

Can you write a test for this user service? I need to mock the database call.

Agent

I'll create a `user.service.test.ts` using Vitest. I'll use `vi.mock` to intercept the database module and provide a mock implementation so we can test the service logic in isolation.

FAQ

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