src/test-setup.ts

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

if (
  typeof globalThis.localStorage === "undefined" ||
  typeof globalThis.localStorage.clear !== "function"
) {
  const store = new Map<string, string>();
  Object.defineProperty(globalThis, "localStorage", {
    configurable: true,
    value: {
      getItem: (key: string) => store.get(key) ?? null,
      setItem: (key: string, value: string) => {
        store.set(key, String(value));
      },
      removeItem: (key: string) => {
        store.delete(key);
      },
      clear: () => {
        store.clear();
      },
      key: (index: number) => Array.from(store.keys())[index] ?? null,
      get length() {
        return store.size;
      },
    },
  });
}