jest.setup.js

import '@testing-library/jest-native/extend-expect';

import mockRNCNetInfo from '@react-native-community/netinfo/jest/netinfo-mock.js';
import mockAsyncStorage from '@react-native-async-storage/async-storage/jest/async-storage-mock';

import { jest } from '@jest/globals';

jest.mock('@react-native-community/netinfo', () => mockRNCNetInfo);
jest.mock('@react-native-async-storage/async-storage', () => mockAsyncStorage);

jest.doMock('@sentry/react-native', () => ({
  init: jest.fn(),
}));

jest.doMock('react-native-reanimated', () => {
  // eslint-disable-next-line @typescript-eslint/no-var-requires
  const Reanimated = require('react-native-reanimated/mock');

  // The mock for `call` immediately calls the callback which is incorrect
  // So we override it with a no-op
  Reanimated.default.call = () => {};

  return Reanimated;
});

// Silence the warning: Animated: `useNativeDriver` is not supported because the native animated module is missing
jest.mock('react-native/Libraries/Animated/NativeAnimatedHelper');

jest.mock('nanoid/non-secure', () => ({
  nanoid: () => 'routeUniqId',
}));

const FRAME_TIME = 10;

global.requestAnimationFrame = (cb) => {
  setTimeout(cb, FRAME_TIME);
};

jest.mock('react-native/Libraries/Components/Switch/Switch', () => {
  // eslint-disable-next-line @typescript-eslint/no-var-requires
  const mockComponent = require('react-native/jest/mockComponent');
  return mockComponent('react-native/Libraries/Components/Switch/Switch');
});

jest.mock('react-native-gesture-handler', () => {
  // eslint-disable-next-line @typescript-eslint/no-var-requires
  const View = require('react-native/Libraries/Components/View/View');
  return {
    Swipeable: View,
    DrawerLayout: View,
    State: {},
    ScrollView: View,
    Slider: View,
    Switch: View,
    TextInput: View,
    ToolbarAndroid: View,
    ViewPagerAndroid: View,
    DrawerLayoutAndroid: View,
    WebView: View,
    NativeViewGestureHandler: View,
    TapGestureHandler: View,
    FlingGestureHandler: View,
    ForceTouchGestureHandler: View,
    LongPressGestureHandler: View,
    PanGestureHandler: View,
    PinchGestureHandler: View,
    RotationGestureHandler: View,
    /* Buttons */
    RawButton: View,
    BaseButton: View,
    RectButton: View,
    BorderlessButton: View,
    /* Other */
    FlatList: View,
    gestureHandlerRootHOC: () => null,
    Directions: {},
  };
});

beforeEach(() => {
  global.fetch = jest.fn((...args) => {
    console.warn('global.fetch needs to be mocked in tests', ...args);
    throw new Error('global.fetch needs to be mocked in tests');
  });
});

//clean up after the tests are finished

afterEach(() => {
  global.fetch.mockRestore();
  //reset any requests handlers that we may add during the tests,
  //so they don't affect other tests.
});