vitest 0.25.0

v0.25.0

on Node.js Yarn

   ✅ Builtin TypeChecking

In v0.25.0, Vitest allows you to write tests for your types, using expectTypeOf or assertType syntaxes. By default all tests inside *.test-d.ts files are considered type tests. Run vitest typecheck to run type tests.

// my.test-d.ts
import { assertType, expectTypeOf } from 'vitest'
import { mount } from './mount.js'

test('my types work properly', () => {
  expectTypeOf(mount).toBeFunction()
  expectTypeOf(mount).parameter(0).toMatchTypeOf<{ name: string }>()

  // @ts-expect-error name is a string
  assertType(mount({ name: 42 }))
})

Learn more at the documentation and this RFC

   🚨 Breaking Changes

• Return context in startVitest()  -  by @antfu in #2072

   🚀 Features

• onTestFailed hook  -  by @antfu in #2210
• Display error frame if present (like Vite)  -  by @haikyuu and @sheremet-va in #2257
• Benchmark table report  -  by @poyoho in #2179
• Add typechecking functionality  -  by @sheremet-va and @antfu in #2107

   🐞 Bug Fixes

• Clear full screen only in watch mode  -  by @sheremet-va (c3d89)
• Don't serialize symbols and immutables  -  by @sheremet-va in #2266
• Use --conditions instead of -C  -  by @sheremet-va in #2267
• Show correct stack trace in errors and console  -  by @sheremet-va and @antfu in #2248
• Align .each behavior with jest  -  by @bartoszgolebiowski and @antfu in #2064
• Remove undefined values in options  -  by @g4rry420 and @antfu in #2281
• coverage: Istanbul provider to preserve implicit else  -  by @AriPerkkio in #2275

    View changes on GitHub