test(resolve): cover the codes that parse the fs path contained postfix

[sun0day]

Description

Add a test case for

vite/packages/vite/src/node/plugins/resolve.ts

Lines 479 to 493 in d23605d

	// if there is a postfix, try resolving it as a complete path first (#4703)
	if (
	postfix &&
	(res = tryResolveFile(
	fsPath,
	'',
	options,
	false,
	targetWeb,
	options.tryPrefix,
	options.skipPackageJson,
	))
	) {
	return res
	}

Additional context

---

Even without these codes, the new test case still passes. It's duplicate with lines below in the new test case.

vite/packages/vite/src/node/plugins/resolve.ts

Lines 545 to 558 in d23605d

	if (
	postfix &&
	(res = tryResolveFile(
	fsPath,
	'',
	options,
	tryIndex,
	targetWeb,
	options.tryPrefix,
	options.skipPackageJson,
	))
	) {
	return res
	}

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the PR Title Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

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[patak-dev]

Just in case, @sun0day, there is an issue in npm that may be affecting CI

[patak-dev]

Actually, @dominikg pointed out the issue is that the lockfile needs to be synced after adding the new private dep. @sun0day you should do an install again and commit that 👍🏼

[sun0day]

Committed. Sorry, I forgot.