automocking providers

src/commands/Commands.test.js

 describe('Commands', () => {
   let uut;
   let mockNativeNavigation;
-  let mockUniqueIdProvider;
 
   beforeEach(() => {
     mockNativeNavigation = {
     };
     require('react-native').NativeModules.NativeNavigation = mockNativeNavigation;
     jest.mock('../providers/UniqueIdProvider');
-    mockUniqueIdProvider = require('../providers/UniqueIdProvider');
     uut = require('./Commands');
   });
 
     });
 
     it('adds uniqueId to passed container', () => {
-      mockUniqueIdProvider.uniqueId = jest.fn((prefix) => `${prefix}123`);
       uut.startApp({
         container: {
           key: 'com.example.MyScreen'

src/providers/__mocks__/UniqueIdProvider.js

+export function uniqueId(prefix) {
+  return `${prefix}123`;
+}