# React native Blob Util Mock for unit test Package Link: [react-native-blob-util](https://github.com/RonRadtke/react-native-blob-util) ## mock code ```javascript jest.mock('react-native-blob-util', () => { return { __esModule: true, default: { DocumentDir: jest.fn(), config: jest.fn(() => ({ fetch: jest.fn(() => ({ progress: jest.fn().mockResolvedValue(true), })), })), fs: { cp: jest.fn().mockResolvedValue(true), dirs: { CacheDir: '/mockCacheDir', }, unlink: jest.fn(), }, }, }; }); ```