[dialog-toggle-source.html]
  [ToggleEvent.source on <dialog> elements: dialog.showModal().]
    expected: FAIL

  [ToggleEvent.soruce on <dialog> elements: command button.]
    expected: FAIL

  [ToggleEvent.soruce on <dialog> elements: open with showModal, close with button.]
    expected: FAIL

  [ToggleEvent.soruce on <dialog> elements: open with button, close with dialog.close().]
    expected: FAIL

  [ToggleEvent.source on <dialog> elements: open with showModal, close with request-close button.]
    expected: FAIL

  [ToggleEvent.source on <dialog> elements: open with button, close with light dismiss.]
    expected: FAIL