chore(infra): Migrate test runner from Vitest to Rstest

[Copilot]

This updates the repository from Vitest to the latest Rstest toolchain. The migration keeps the existing test coverage and e2e package self-import pattern intact while aligning test configuration with the Rslib-based project setup.

• Test runner migration

  • Replaced vitest with @rstest/core
  • Updated package.json scripts:
    • test → rstest
    • test:watch → rstest --watch

• Rstest configuration

  • Replaced vitest.config.ts with rstest.config.ts
  • Switched to the Rslib adapter via @rstest/adapter-rslib
  • Added a local alias for path-serializer so e2e tests resolve the package to source instead of requiring a prebuilt dist

• Dependency alignment

  • Added:
    • @rstest/core
    • @rstest/adapter-rslib
  • Removed:
    • vitest
  • Bumped @rslib/core to a version compatible with the current Rstest adapter

• Test source updates

  • Replaced test imports from vitest with @rstest/core
  • Kept test structure and assertions unchanged aside from framework import updates
  • Applied a small test-file cleanup for lint compatibility in src/normalize.test.ts

Example of the API/config migration:

// rstest.config.ts
import { fileURLToPath } from 'node:url';
import { withRslibConfig } from '@rstest/adapter-rslib';
import { defineConfig } from '@rstest/core';

export default defineConfig({
  extends: withRslibConfig(),
  include: ['./src/**/*.test.ts', './e2e/**/*.test.ts'],
  resolve: {
    alias: {
      'path-serializer': fileURLToPath(new URL('./src/index.ts', import.meta.url)),
    },
  },
});

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• rsbuild.rs
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• rstest.rs
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

📱 Kick off Copilot coding agent tasks wherever you are with GitHub Mobile, available on iOS and Android.

[Copilot]

Pull request overview

Migrates the repository’s test runner/tooling from Vitest to Rstest, aligning the test setup with the current Rslib-based build stack and updating CI to run the new runner.

Changes:

• Replaced Vitest with @rstest/core + @rstest/adapter-rslib, updated test scripts, and bumped @rslib/core accordingly.
• Updated unit/e2e test files and snapshot headers to use Rstest imports/output.
• Updated GitHub Actions workflows to run tests/releases under a newer Node version.

Reviewed changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
vitest.config.ts	Removed the old Vitest config.
rstest.config.ts	Added Rstest config using the Rslib adapter.
package.json	Switched test scripts to rstest; replaced Vitest dev dependency with Rstest deps; bumped @rslib/core.
pnpm-lock.yaml	Lockfile updates for the new Rstest/Rslib toolchain versions and transitive deps.
src/normalize.test.ts	Updated test framework imports; minor loop refactor for lint compatibility.
e2e/transformCLR.test.ts	Updated imports to @rstest/core.
e2e/replaceRootWithFileProtocol.test.ts	Updated imports to @rstest/core.
e2e/pnpmInnerWin32.test.ts	Updated imports to @rstest/core.
e2e/pnpmGlobalVirtualStore.test.ts	Updated imports to @rstest/core.
e2e/index.test.ts	Updated imports to @rstest/core.
e2e/features.test.ts	Consolidated Vitest imports into @rstest/core.
e2e/escapeEOL.test.ts	Consolidated Vitest imports into @rstest/core.
e2e/snapshots/index.test.ts.snap	Updated snapshot header to Rstest format.
.github/workflows/test-windows.yml	Updated test matrix Node version.
.github/workflows/test-ubuntu.yml	Updated test matrix Node version.
.github/workflows/release.yml	Updated release workflow Node version.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.