Unable to mock 'vue-meta'

[jagoncalves14]

Describe the bug

I was trying to upgrade Vitest from version 0.12.9 to 0.19.0 and now tests that are asserting a specific function from a module to have been called started failing.

That module is an npm package called vue-meta. (Link)
I have components that import { useMeta } from 'vue-meta'.

That useMeta function is called when some components are mounted or created.
All I want to do is to spy useMeta and assert it, expecting that it gets called. Should be easy, right?

But for some reason this stopped working after the upgrade and I'm clueless in understanding why.

I was able to create StackBlitz reproducing this. Just open the link and the test will run automatically.

Reproduction

https://stackblitz.com/edit/vue-vitest-demo

System Info

System:
    OS: macOS 12.4
    CPU: (12) x64 Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
    Memory: 819.89 MB / 16.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 14.20.0 - ~/.nvm/versions/node/v14.20.0/bin/node
    npm: 8.3.2 - ~/Projects/clearancejobs/node_modules/.bin/npm
  Browsers:
    Chrome: 103.0.5060.134
    Firefox: 100.0
    Safari: 15.5
  npmPackages:
    @vitejs/plugin-vue: 2.1.0 => 2.1.0
    vite: 2.9.9 => 2.9.9
    vitest: 0.19.0 => 0.19.0

Used Package Manager

npm

Validations

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• Read the Contributing Guidelines.
• Read the docs.
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• The provided reproduction is a minimal reproducible example of the bug.

[jagoncalves14]

Note: This started happening in vitest@0.14.2

[sheremet-va]

It's mention in #1740 that #1726 fixed it, can you confirm? The PR is released with v0.20.0. If so, you can close the issue.

[PatrickChen928]

By my test, it's ok in v0.20.1.

[jagoncalves14]

@sheremet-va, @ChpShy. Just tested it in both v.0.20.1 and v.0.20.2 and the issue is fixed.

Thanks to everyone involved, that was a super quick fix!
I'm closing the issue as its been resolved.

[luckylooke]

Also unable to mock vue-meta, google brings me here so I am leaving link for my followers. I have find out that now it seems to be unexpected breaking change in vite v3.0.6 more info in dedicated issue.

Happy coding namaste 🙏