Vitest config `benchmark.reporters` has incorrect type; forbids passing arbitrary file paths

[Bertie690]

Describe the bug

Currently, benchmark.reporters has the type Arrayable<"default" | "verbose" | Reporter>, meaning the only strings it can accept without type errors are those of the built-in bench reporters.

This goes directly against its documentation ("... one or more built-in report names, reporter instances, and/or paths to custom reporters"¹), as well as Vitest's runtime behavior of using the reporter as normal.

vitest/packages/vitest/src/node/types/benchmark.ts

Lines 27 to 33 in 4d7938a

	/**
	* Custom reporter for output. Can contain one or more built-in report names, reporter instances,
	* and/or paths to custom reporters
	*
	* @default ['default']
	*/
	reporters?: Arrayable<BenchmarkBuiltinReporters | Reporter>

A solution would be adding string & {} to the type signature; this would allow arbitrary strings while preserving IDE autocomplete for the default types.

Reproduction

TS Playground

System Info

N/A; occurs on latest version of vitest.

Used Package Manager

pnpm

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

Footnotes

1. Bolded for emphasis ↩

[Bertie690]

If wanted, I can make a PR for this - the issue is literally a oneline fix to a single file.

[hi-ogawa]

@Bertie690 Please go ahead a PR. Thanks!