This PR modernizes the testing infrastructure by migrating from Mocha/Chai to Vitest v3.2.4, and updates GitHub Actions workflows to use the latest Node.js versions.

Test Framework Migration

Removed dependencies:

• mocha,chai,chai-spies,ts-node and related@types packages

Added:

• vitest@^3.2.4 with proper TypeScript support

Test files updated:
All test files (test/index.ts,test/decorator.ts) have been converted from Chai assertions to Vitest:

// Before (Chai)importchaifrom'chai'importspiesfrom'chai-spies'const{expect, spy}=chaiconstfn=spy(incr(1))expect([result]).to.eql([1,1,1,1])expect(fn).to.have.been.called.exactly(1)// After (Vitest)import{describe,it,expect,vi}from'vitest'constfn=vi.fn(incr(1))expect([result]).toEqual([1,1,1,1])expect(fn).toHaveBeenCalledTimes(1)

Configuration changes:

• Createdvitest.config.ts for Vitest configuration
• Updated test script fromnode --loader ts-node/esm.mjs node_modules/mocha/lib/cli/cli.js tovitest run
• Removed mocha configuration section frompackage.json
• Vitest runs TypeScript directly without needing a separate build step

Dependency Updates

• Updatedtypescript from^4.6.4 to^5.9.3 for better compatibility
• Updated@types/node from^14.0.19 to^22.18.8 to match Node.js 24 requirements
• AddedskipLibCheck: true totsconfig.json to handle type definitions in node_modules

GitHub Actions Workflows

nodejs.yml:

• Updated to use Node.js 24
• Addednpx playwright install chromium step before running tests

publish.yml:

• Updated default Node.js version from 22 to 24
• Addednpx playwright install chromium step before running tests

Both workflows already used the latest versions ofactions/checkout@v4 andactions/setup-node@v4.

Validation

All existing tests pass successfully:

• ✅ 11 tests across 2 test files
• ✅ Lint passes without errors
• ✅ Build completes successfully (ESM + CJS outputs)
• ✅ No breaking changes to the public API

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