This test assumes 'user-select' never affects draggability (this is not spec'ed clearly, but it's the behavior we're used to).

Normal links are draggable (might change if the CSS spec starts to say that user-select: text forces selectability).

buttons are not draggable.

But images are.

dragme-spans are also.

Editable links are not draggable.

Editable links are editable even when parent is draggable.