Example using jsdom

Author: edkimmel

jest-setup.ts

@@ -1,4 +1,3 @@
-import './src/__tests__/setImmediateShim'
 import { resetToDefaults, configure } from './src/pure';
 
 beforeEach(() => {

jest.config.js

@@ -1,6 +1,7 @@
 module.exports = {
   preset: 'react-native',
   setupFilesAfterEnv: ['./jest-setup.ts'],
+  testEnvironment: "jsdom", // This causes setImmediate to be undefined.
   testPathIgnorePatterns: ['build/', 'examples/', 'experiments-app/', 'timer-utils'],
   testTimeout: 60000,
   transformIgnorePatterns: ['/node_modules/(?!(@react-native|react-native)/).*/'],

package.json

@@ -86,6 +86,7 @@
     "eslint-plugin-simple-import-sort": "^12.1.1",
     "flow-bin": "~0.170.0",
     "jest": "^29.7.0",
+    "jest-environment-jsdom": "^29.7.0",
     "prettier": "^2.8.8",
     "react": "19.0.0",
     "react-native": "0.79.1",