platform-codebase/@packages/@providers/attribute-ui/src/test-setup.ts

/**
 * Vitest test setup
 *
 * Configures testing environment and utilities.
 */

import { expect, afterEach, beforeAll } from 'vitest'
import { cleanup } from '@testing-library/react'
import * as matchers from '@testing-library/jest-dom/matchers'

// Extend Vitest's expect with jest-dom matchers
expect.extend(matchers)

// Cleanup after each test to prevent DOM pollution
afterEach(() => {
  cleanup()
})

// Mock ResizeObserver for virtualization libraries
beforeAll(() => {
  global.ResizeObserver = class ResizeObserver {
    observe() {}
    unobserve() {}
    disconnect() {}
  }

  // Mock element dimensions for jsdom (needed by virtualizers)
  Object.defineProperty(HTMLElement.prototype, 'offsetHeight', {
    configurable: true,
    value: 400,
  })
  Object.defineProperty(HTMLElement.prototype, 'offsetWidth', {
    configurable: true,
    value: 300,
  })
})