Test with `expect(promise).resolves` with promise that never resolves and without `await` hangs

[4ndypanda]

Describe the bug

The docs for https://vitest.dev/api/expect.html#resolves state

If the assertion is not awaited, then you will have a false-positive test that will pass every time.

which made me think that the second test without the await on the assertion would just return and pass

import { expect, test } from 'vitest';

test('times out from test function timeout', async () => {
  await expect(new Promise((_resolve) => {})).resolves.toEqual(1);
});

test('hangs forever', async () => {
  expect(new Promise((_resolve) => {})).resolves.toEqual(1);
});

but instead it just hangs forever.

Reproduction

https://stackblitz.com/edit/vitest-dev-vitest-7mithq?file=test%2Fbasic.test.ts

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.20.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    @vitest/ui: latest => 2.0.5 
    vite: latest => 5.4.2 
    vitest: latest => 2.0.5

Used Package Manager

npm

Validations

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• 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.
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• The provided reproduction is a minimal reproducible example of the bug.

[hi-ogawa]

Promise.allSettled is hanging and this is outside of test timeout logic, so nothing happens

vitest/packages/runner/src/run.ts

Lines 226 to 228 in 85fb94a

	// some async expect will be added to this array, in case user forget to await theme
	if (test.promises) {
	const result = await Promise.allSettled(test.promises)

It looks like the documentation for resolves warning is not correct and Vitest automatically awaits them.