dom-testing-library: Doesn't work with custom jsdom

• dom-testing-library version: 3.5.1
• react version: 16.4.1
• node version: 10.4.1
• npm (or yarn) version: yarn 1.7.0

Relevant code or config:

Usual installation,

"testEnvironment": "node",

as jest configuration, then something like following in tests:

import { getByText } from 'dom-testing-library'

it('Suggests cities to search by', async () => {
  const container = createJSDOM(...)
  getByText(container, 'foobar')
})

What you did:

Tried to use dom-testing-library with node environment in Jest + creating own jsdom instance in a helper and passing it to dom-testing-library.

What happened:

● Test suite failed to run

ReferenceError: window is not defined

  at Object.<anonymous> (node_modules/mutationobserver-shim/dist/mutationobserver.min.js:3:1)
  at Object.<anonymous> (node_modules/dom-testing-library/dist/wait-for-element.js:8:1)
  at Object.<anonymous> (node_modules/dom-testing-library/dist/index.js:32:23)

Reproduction:

As above, enable node jest environment and try to use dom-testing-library with some custom container

Suggested solution:

check if shim is loaded on given container and install it only then? generally something to support no global window object in jest environment