[eventsource-constructor-non-same-origin.htm]
  [shared worker - EventSource: constructor (act as if there is a network error) (ftp://example.not)]
    expected: FAIL

  [shared worker - EventSource: constructor (act as if there is a network error) (about:blank)]
    expected: FAIL

  [shared worker - EventSource: constructor (act as if there is a network error) (mailto:whatwg@awesome.example)]
    expected: FAIL

  [shared worker - EventSource: constructor (act as if there is a network error) (javascript:alert('FAIL'))]
    expected: FAIL