vitest.setup.ts

// Node 24+ exposes a native `localStorage` global that shadows jsdom's and
// throws unless `--localstorage-file` is passed. Override it with a simple
// in-memory Storage so tests work on Node 24/26 and CI alike.
class MemoryStorage implements Storage {
  #store = new Map<string, string>();

  get length(): number {
    return this.#store.size;
  }

  clear(): void {
    this.#store.clear();
  }

  getItem(key: string): string | null {
    return this.#store.get(key) ?? null;
  }

  key(index: number): string | null {
    return [...this.#store.keys()][index] ?? null;
  }

  removeItem(key: string): void {
    this.#store.delete(key);
  }

  setItem(key: string, value: string): void {
    this.#store.set(key, String(value));
  }
}

Object.defineProperty(globalThis, "localStorage", {
  value: new MemoryStorage(),
  configurable: true,
  writable: true,
});