[observable-constructor.window.html]
  [No observer handlers can be invoked in detached document]
    expected: FAIL

  [Subscriber.error() does not "report the exception" even when an `error()` handler is not present, when it is invoked in a detached document]
    expected: FAIL

  [Cannot subscribe to an Observable in a detached document]
    expected: FAIL

  [Observable from EventTarget does not get notified for events in detached documents]
    expected: FAIL