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

class MockDataTransfer implements DataTransfer {
  dropEffect: DataTransfer['dropEffect'] = 'none';
  effectAllowed: DataTransfer['effectAllowed'] = 'all';
  files: FileList = Object.assign([], { item: (i: number) => this.files[i] || null });
  items: DataTransferItemList = Object.assign([], {
    add: () => null,
    remove: () => {},
    clear: () => {},
    item: () => null,
  }) as unknown as DataTransferItemList;
  types: readonly string[] = [];

  clearData(): void {}
  getData(): string { return ''; }
  setData(): void {}
  setDragImage(): void {}
}

Object.defineProperty(globalThis, 'DataTransfer', {
  value: MockDataTransfer,
});

Object.defineProperty(window, 'matchMedia', {
  writable: true,
  value: (query: string) => ({
    matches: false,
    media: query,
    onchange: null,
    addListener: () => {},
    removeListener: () => {},
    addEventListener: () => {},
    removeEventListener: () => {},
    dispatchEvent: () => false,
  }),
});