__vite_ssr_dynamic_import__ doesn't coerce import(specifier) to a string

[jcbhmr]

Describe the bug

If you pass in a non-string into an import statement when using Vitest, you'll get a cryptic "id.startsWith is not a function" message. I think this is due to the custom __vite_ssr_dynamic_import__() function that seems to replace all import() stuff not properly doing myArg = `${myArg}`; like browsers and Node.js do natively to make sure the arg is a true string.

Reproduction

https://stackblitz.com/edit/vitest-dev-vitest-mamgrv?file=test%2Fbasic.test.ts

System Info

~/projects/vitest-dev-vitest-mamgrv 1m 15s
❯ npx envinfo --system --npmPackages '{vitest,@vitest/*,vite,@vitejs/*}' --binaries --browsers
success Install finished in 0.928s


  System:
    OS: Linux 5.0 undefined
    CPU: (4) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 16.14.2 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 7.17.0 - /usr/local/bin/npm
  npmPackages:
    @vitest/ui: latest => 0.31.1 
    vite: latest => 4.3.8 
    vitest: latest => 0.31.1 

### Used Package Manager

npm

### Validations

- [X] Follow our [Code of Conduct](https://github.com/vitest-dev/vitest/blob/main/CODE_OF_CONDUCT.md)
- [X] Read the [Contributing Guidelines](https://github.com/vitest-dev/vitest/blob/main/CONTRIBUTING.md).
- [X] Read the [docs](https://vitest.dev/guide/).
- [X] Check that there isn't [already an issue](https://github.com/vitest-dev/vitest/issues) that reports the same bug to avoid creating a duplicate.
- [X] Check that this is a concrete bug. For Q&A open a [GitHub Discussion](https://github.com/vitest-dev/vitest/discussions) or join our [Discord Chat Server](https://chat.vitest.dev).
- [X] The provided reproduction is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.

[stackblitz]

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• vitest-dev-vitest-mamgrv (Open reproduction)