[dialog-showModal.html]
  [dialog element: showModal()]
    expected: FAIL

  [showModal() on a <dialog> that already has an open attribute throws an InvalidStateError exception]
    expected: FAIL

  [showModal() on a <dialog> after initial showModal() and removing the open attribute]
    expected: FAIL

  [showModal() on a <dialog> not in a Document throws an InvalidStateError exception]
    expected: FAIL

  [when opening multiple dialogs, only the newest one is non-inert]
    expected: FAIL

  [opening dialog without focusable children]
    expected: FAIL

  [opening dialog with multiple focusable children]
    expected: FAIL

  [opening dialog with multiple focusable children, one having the autofocus attribute]
    expected: FAIL

  [when opening multiple dialogs, the most recently opened is rendered on top]
    expected: FAIL

  [Although the document is not attached to any pages, showModal() should execute as normal.]
    expected: FAIL

  [When the document is not attached to any pages, showModal() should throw.]
    expected: FAIL