Recipe from https://joaoforja.com/blog/recipes-for-testing-react-apps-tl/

hoc.test.js

import React from "react"
import { render } from "@testing-library/react"

test("Adds number and gives result as a prop", function test() {
  let result
  function WrappedComponent({ sum }) {
    result = sum
    return null
  }
  const ComponentWithSum = withSum(WrappedComponent, [4, 6])
  render(<ComponentWithSum />)

  expect(result).toBe(10)
})

function withSum(WrappedComponent, numbersToSum) {
  const sum = numbersToSum.reduce((a, b) => a + b, 0)
  return () => <WrappedComponent sum={sum} />
}