Convert test suite from Jest to Vitest

[Copilot]

Migrates the test infrastructure from Jest to Vitest, removing all Jest dependencies and configuration.

Changes

Dependencies

• Removed: jest, @jest/globals, @types/jest, ts-jest, ts-jest-resolver, eslint-plugin-jest
• Added: vitest, @vitest/ui, @vitest/coverage-v8

Configuration

• Replaced jest.config.js with vitest.config.ts
• Updated ESLint config to remove Jest-specific plugins and globals
• Modified test scripts in package.json to use vitest run

Tests

• Converted mocking from Jest's jest.unstable_mockModule() to Vitest's vi.mock()
• Replaced fixture-based mocks with inline mock definitions
• Removed outdated template tests (wait.test.ts) and __fixtures__ directory

Example migration:

// Before (Jest)
import { jest } from '@jest/globals'
import * as core from '../__fixtures__/core.js'
jest.unstable_mockModule('@actions/core', () => core)

// After (Vitest)
import { vi } from 'vitest'
const mockCore = { getInput: vi.fn(), setOutput: vi.fn() }
vi.mock('@actions/core', () => mockCore)

Documentation

• Updated AGENTS.md and .github/prompts/unit-test.prompt.md to reflect Vitest usage

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:

• img.shields.io
  • Triggering command: node /home/REDACTED/work/gh-aw-mcp-container-action/gh-aw-mcp-container-action/node_modules/.bin/make-coverage-badge --output-path ./badges/coverage.svg (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)

Original prompt

Concert tests to vitest, remove jest.

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