Vitest is broken in Astro v5

[sarthikg]

Astro Info

Astro                    v5.0.4
Node                     v20.13.1
System                   macOS (arm64)
Package Manager          npm
Output                   static
Adapter                  @astrojs/vercel
Integrations             @astrojs/sitemap
                         @astrojs/react

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

As per the (docs)[https://docs.astro.build/en/guides/testing/#vitest], configuring Vitest in Astro can be done by creating a vitest.config.ts file, with the following contents:

/// <reference types="vitest" />
import { getViteConfig } from "astro/config";

export default getViteConfig({
  test: {
     // Config Variables
  },
});

Though, after upgrading to Astro v5, this doesn't seem to be working anymore. The build is failing, as well as execution of tests are failing.

Error is as follows:

vitest.config.ts:5:3 - error ts(2353): Object literal may only specify known properties, and 'test' does not exist in type 'UserConfig'.

What's the expected result?

The tests & build should be run.

Link to Minimal Reproducible Example

sarthikg/portfolio#255

Participation

• I am willing to submit a pull request for this issue.

[github-actions]

Hello @sarthikg. Please provide a minimal reproduction using a GitHub repository or StackBlitz. Issues marked with needs repro will be closed if they have no activity within 3 days.

[ematipico]

Please provide a minimal reproduction, a project isn't acceptable

[ArmandPhilippot]

Hi @sarthikg, I think this is similar to #12662.

To resume: Vitest is not yet(/longer) compatible with Vite v6, so there are conflicts right now. In the meantime, I think the workaround in #12662 should work for you too.

[ascorbic]

Closing as a duplicate of #12662. It's correct that this is related to Vitest not working properly with Vite 6. There is more info in this issue: vitest-dev/vitest#6992