I am trying to test a react typescript project using jest but it's giving a confusing error:

Error image

Here is my package.json:

"dependencies": {
    "@testing-library/jest-dom": "^5.16.4",
    "@testing-library/react": "^12.1.5",
    "@testing-library/user-event": "^13.5.0",
    "@types/jest": "^27.4.1",
    "@types/node": "^16.11.26",
    "@types/react": "^17.0.43",
    "@types/react-dom": "^17.0.14",
    "jest": "^27.5.1",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-router-dom": "^6.2.2",
    "react-scripts": "5.0.0",
    "ts-jest": "^27.1.4",
    "typescript": "^4.6.3",
    "web-vitals": "^2.1.4",
},

"devDependencies": {
    "@types/react-test-renderer": "^18.0.0",
    "react-test-renderer": "^18.1.0"
}

I wrote this basic test which gives the error:

import renderer from 'react-test-renderer'
import AddShipmentButton from './AddShipmentButton'

it('works', () => {
    const tree = renderer.create(<AddShipmentButton />).toJSON()
    expect(tree).toMatchSnapshot()
})

I had to install the dependencies using --legacy-peer-deps. What could be the issue? Thanks in advance.

CodePudding user response：

In my opinion your import is wrong , try with this way

import TestRenderer from 'react-test-renderer';

import AddShipmentButton from './AddShipmentButton'

it('works', () => {
  const tree = TestRenderer.create(<AddShipmentButton />).toJSON()
  expect(tree).toMatchSnapshot()
})

Read usage of TestRenderer here

CodePudding user response：

The problem was that I installed the latest version of react-test-renderer v18.0.1 when the React version is v17.0.2. Installing react-test-renderer version 17.0.2 solved this issue.