Function makeScrollable

src/cdk/drag-drop/directives/test-utils.spec.ts:147–161

(
  direction: 'vertical' | 'horizontal' = 'vertical',
  element = document.body,
)

 * @returns Function that should be used to clean up after the test is done.
 */
export function makeScrollable(
  direction: 'vertical' | 'horizontal' = 'vertical',
  element = document.body,
) {
  const veryTallElement = document.createElement('div');
  veryTallElement.style.width = direction === 'vertical' ? '100%' : '4000px';
  veryTallElement.style.height = direction === 'vertical' ? '2000px' : '5px';
  element.prepend(veryTallElement);
  scrollTo(0, 0);

  return () => {
    scrollTo(0, 0);
    veryTallElement.remove();
  };
}

export function wait(ms: number) {
  return new Promise(resolve => setTimeout(resolve, ms));