Function rect

packages/react-aria/test/dnd/dnd.test.js:1969–1976

(left, top)

        let droppable = draggable.parentElement;
        let droppable2 = tree.getByText('Drop here 2');
        let rect = (left, top) => ({
          left,
          top,
          x: left,
          y: top,
          width: 100,
          height: 50
        });

        jest.spyOn(HTMLElement.prototype, 'getBoundingClientRect').mockImplementation(function () {
          if (this === droppable) {