BackupX/web/src/test/setup.ts

import '@testing-library/jest-dom/vitest'

const storage = (() => {
  const store = new Map<string, string>()
  return {
    getItem: (key: string) => store.get(key) ?? null,
    setItem: (key: string, value: string) => {
      store.set(key, value)
    },
    removeItem: (key: string) => {
      store.delete(key)
    },
    clear: () => {
      store.clear()
    },
    key: (index: number) => Array.from(store.keys())[index] ?? null,
    get length() {
      return store.size
    },
  }
})()

Object.defineProperty(window, 'localStorage', {
  value: storage,
  configurable: true,
})