askirmas / react-classnaming

import {renderToStaticMarkup} from "react-dom/server"

const {isArray: $isArray} = Array

export default expectToRender

function expectToRender(

  element: Parameters<typeof renderToStaticMarkup>[0],

  expectation: string | string[] 

) {

  return expect(

    renderToStaticMarkup(element)

  ).toBe(

    !$isArray(expectation)

    ? expectation

    : expectation.join("")

  )

}