Test suite failed to run TypeError: Cannot read property 'hasOwnProperty' of undefined

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I am trying to start using jest in my React App but getting this error:

Test suite failed to run

TypeError: Cannot read property 'hasOwnProperty' of undefined

  at node_modules/react-test-renderer/cjs/react-test-renderer-shallow.development.js:40:27
  at Object.<anonymous> (node_modules/react-test-renderer/cjs/react-test-renderer-shallow.development.js:1018:5)
  at Object.<anonymous> (node_modules/react-test-renderer/shallow.js:6:20)
  at Object.<anonymous> (node_modules/enzyme-adapter-react-16/build/ReactSixteenAdapter.js:11:39)

Test Suites: 1 failed, 1 total

This is what I have installed:

  "devDependencies": {
    "enzyme": "^3.11.0",
    "enzyme-adapter-react-16": "^1.15.5",
    "jest-enzyme": "^7.1.2",
    "jest": "^26.6.3",

This my starter code just to start testing:

import React from 'react';
import Enzyme from 'enzyme';
import EnzymeAdapter from 'enzyme-adapter-react-16';



Enzyme.configure({ adapter: new EnzymeAdapter() });

test('should render without error', () => {});

I guess that problem is with Dependencies but not sure how I can fix it. If you say to remove Jest as it is coming with react, I get the same error even if I remove Jest

This is my test script:

 "scripts": {
    "test": "react-scripts test",
  }
enzyme jestjs reactjs
1 Answers

Updating React and React-dom to the newest version solves problem as I am using

enzyme-adapter-react-16

I have to use React and React-dom versions greater than 16. My version was 15.7 Here is the command for updating:

npm install --save react@^17.0.1 react-dom@^17.0.1
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