draggable/scripts/test/helpers/environment.js

export function createSandbox(content) {
  const sandbox = document.createElement('div');
  sandbox.innerHTML = content;
  document.body.appendChild(sandbox);
  return sandbox;
}

export function withElementFromPoint(elementFromPoint, callback) {
  const originalElementFromPoint = document.elementFromPoint;
  document.elementFromPoint = () => elementFromPoint;
  callback();
  document.elementFromPoint = originalElementFromPoint;
}