multica/apps/desktop/test/setup.ts

import "@testing-library/jest-dom/vitest";

function createMemoryStorage(): Storage {
  const values = new Map<string, string>();

  return {
    get length() {
      return values.size;
    },
    clear: () => values.clear(),
    getItem: (key: string) => values.get(key) ?? null,
    key: (index: number) => Array.from(values.keys())[index] ?? null,
    removeItem: (key: string) => {
      values.delete(key);
    },
    setItem: (key: string, value: string) => {
      values.set(key, value);
    },
  };
}

const localStorageIsUsable =
  typeof globalThis.localStorage?.getItem === "function" &&
  typeof globalThis.localStorage?.setItem === "function" &&
  typeof globalThis.localStorage?.removeItem === "function" &&
  typeof globalThis.localStorage?.clear === "function";

if (!localStorageIsUsable) {
  const storage = createMemoryStorage();
  Object.defineProperty(globalThis, "localStorage", {
    configurable: true,
    value: storage,
  });
  Object.defineProperty(window, "localStorage", {
    configurable: true,
    value: storage,
  });
}