How to Enable Jest & Enzyme to write tests using React

I am currently starting to learn about how to write tests in React and I am facing issues to make my IDE (Webstorm) recognize my .test.js files and apparently recognize jest itself.

On my course, a 2017 course, I have learned that jest would be set on my package.json file as it would be part of the react-create-app library. I did not identify the dependency installed at my package.json file inside the "dependencies" part when I started following up with the course module.

I had then installed jest along with the following dependencies as per listed below:

 "enzyme": "^3.11.0",
 "enzyme-adapter-react-16": "^1.15.2",
 "react-test-render": "^1.1.2",
 "enzyme-to-json": "^3.4.4",

The first issue was with a conflict of dependencies which had broken my app. It seems that the most recent version of jest is not accepted by react-scrips latest version 3.4.1. So I had to downgrade the jest version to 24.9.0 in order to run my app again on development mode.

Then I have created a file to learn my first testing skills and I have noticed that describe() is not being recognized at all.

I don't know what to do to make it work. I don't know if this is still the best set up to write tests as well, as this is a 2017 React course.

Please see my package.json file:

{
  "name": "veggie-burguers",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^4.2.4",
    "@testing-library/react": "^9.5.0",
    "@testing-library/user-event": "^7.1.2",
    "axios": "^0.19.2",
    "enzyme": "^3.11.0",
    "enzyme-adapter-react-16": "^1.15.2",
    "enzyme-to-json": "^3.4.4",
    "jest": "^24.9.0",
    "prop-types": "^15.7.2",
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-redux": "^7.2.0",
    "react-router": "^5.2.0",
    "react-router-dom": "^5.2.0",
    "react-scripts": "3.4.1",
    "react-test-render": "^1.1.2",
    "redux": "^4.0.5",
    "redux-thunk": "^2.3.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

In case there is more info needed I will update this enquiry accordingly.