
PASS BeforeUnloadEvent should be an alias for BeforeUnloadEvent. 
PASS createEvent('BeforeUnloadEvent') should be initialized correctly. 
PASS beforeunloadevent should be an alias for BeforeUnloadEvent. 
PASS createEvent('beforeunloadevent') should be initialized correctly. 
PASS BEFOREUNLOADEVENT should be an alias for BeforeUnloadEvent. 
PASS createEvent('BEFOREUNLOADEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "BeforeUnloadEvents" 
PASS CompositionEvent should be an alias for CompositionEvent. 
PASS createEvent('CompositionEvent') should be initialized correctly. 
PASS compositionevent should be an alias for CompositionEvent. 
PASS createEvent('compositionevent') should be initialized correctly. 
PASS COMPOSITIONEVENT should be an alias for CompositionEvent. 
PASS createEvent('COMPOSITIONEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "CompositionEvents" 
PASS CustomEvent should be an alias for CustomEvent. 
PASS createEvent('CustomEvent') should be initialized correctly. 
PASS customevent should be an alias for CustomEvent. 
PASS createEvent('customevent') should be initialized correctly. 
PASS CUSTOMEVENT should be an alias for CustomEvent. 
PASS createEvent('CUSTOMEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "CustomEvents" 
FAIL DeviceMotionEvent should be an alias for DeviceMotionEvent. The operation is not supported.
FAIL createEvent('DeviceMotionEvent') should be initialized correctly. undefined is not an object (evaluating 'ev.type')
FAIL devicemotionevent should be an alias for DeviceMotionEvent. The operation is not supported.
FAIL createEvent('devicemotionevent') should be initialized correctly. undefined is not an object (evaluating 'ev.type')
FAIL DEVICEMOTIONEVENT should be an alias for DeviceMotionEvent. The operation is not supported.
FAIL createEvent('DEVICEMOTIONEVENT') should be initialized correctly. undefined is not an object (evaluating 'ev.type')
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "DeviceMotionEvents" 
FAIL DeviceOrientationEvent should be an alias for DeviceOrientationEvent. The operation is not supported.
FAIL createEvent('DeviceOrientationEvent') should be initialized correctly. undefined is not an object (evaluating 'ev.type')
FAIL deviceorientationevent should be an alias for DeviceOrientationEvent. The operation is not supported.
FAIL createEvent('deviceorientationevent') should be initialized correctly. undefined is not an object (evaluating 'ev.type')
FAIL DEVICEORIENTATIONEVENT should be an alias for DeviceOrientationEvent. The operation is not supported.
FAIL createEvent('DEVICEORIENTATIONEVENT') should be initialized correctly. undefined is not an object (evaluating 'ev.type')
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "DeviceOrientationEvents" 
PASS DragEvent should be an alias for DragEvent. 
PASS createEvent('DragEvent') should be initialized correctly. 
PASS dragevent should be an alias for DragEvent. 
PASS createEvent('dragevent') should be initialized correctly. 
PASS DRAGEVENT should be an alias for DragEvent. 
PASS createEvent('DRAGEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "DragEvents" 
PASS Event should be an alias for Event. 
PASS createEvent('Event') should be initialized correctly. 
PASS event should be an alias for Event. 
PASS createEvent('event') should be initialized correctly. 
PASS EVENT should be an alias for Event. 
PASS createEvent('EVENT') should be initialized correctly. 
PASS Events should be an alias for Event. 
PASS createEvent('Events') should be initialized correctly. 
PASS events should be an alias for Event. 
PASS createEvent('events') should be initialized correctly. 
PASS EVENTS should be an alias for Event. 
PASS createEvent('EVENTS') should be initialized correctly. 
PASS FocusEvent should be an alias for FocusEvent. 
PASS createEvent('FocusEvent') should be initialized correctly. 
PASS focusevent should be an alias for FocusEvent. 
PASS createEvent('focusevent') should be initialized correctly. 
PASS FOCUSEVENT should be an alias for FocusEvent. 
PASS createEvent('FOCUSEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "FocusEvents" 
PASS HashChangeEvent should be an alias for HashChangeEvent. 
PASS createEvent('HashChangeEvent') should be initialized correctly. 
PASS hashchangeevent should be an alias for HashChangeEvent. 
PASS createEvent('hashchangeevent') should be initialized correctly. 
PASS HASHCHANGEEVENT should be an alias for HashChangeEvent. 
PASS createEvent('HASHCHANGEEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "HashChangeEvents" 
PASS HTMLEvents should be an alias for Event. 
PASS createEvent('HTMLEvents') should be initialized correctly. 
PASS htmlevents should be an alias for Event. 
PASS createEvent('htmlevents') should be initialized correctly. 
PASS HTMLEVENTS should be an alias for Event. 
PASS createEvent('HTMLEVENTS') should be initialized correctly. 
PASS KeyboardEvent should be an alias for KeyboardEvent. 
PASS createEvent('KeyboardEvent') should be initialized correctly. 
PASS keyboardevent should be an alias for KeyboardEvent. 
PASS createEvent('keyboardevent') should be initialized correctly. 
PASS KEYBOARDEVENT should be an alias for KeyboardEvent. 
PASS createEvent('KEYBOARDEVENT') should be initialized correctly. 
FAIL Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "KeyboardEvents" assert_throws_dom: function "function () {
          var evt = document.createEvent(plural);
        }" did not throw
PASS MessageEvent should be an alias for MessageEvent. 
PASS createEvent('MessageEvent') should be initialized correctly. 
PASS messageevent should be an alias for MessageEvent. 
PASS createEvent('messageevent') should be initialized correctly. 
PASS MESSAGEEVENT should be an alias for MessageEvent. 
PASS createEvent('MESSAGEEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "MessageEvents" 
PASS MouseEvent should be an alias for MouseEvent. 
PASS createEvent('MouseEvent') should be initialized correctly. 
PASS mouseevent should be an alias for MouseEvent. 
PASS createEvent('mouseevent') should be initialized correctly. 
PASS MOUSEEVENT should be an alias for MouseEvent. 
PASS createEvent('MOUSEEVENT') should be initialized correctly. 
PASS MouseEvents should be an alias for MouseEvent. 
PASS createEvent('MouseEvents') should be initialized correctly. 
PASS mouseevents should be an alias for MouseEvent. 
PASS createEvent('mouseevents') should be initialized correctly. 
PASS MOUSEEVENTS should be an alias for MouseEvent. 
PASS createEvent('MOUSEEVENTS') should be initialized correctly. 
PASS StorageEvent should be an alias for StorageEvent. 
PASS createEvent('StorageEvent') should be initialized correctly. 
PASS storageevent should be an alias for StorageEvent. 
PASS createEvent('storageevent') should be initialized correctly. 
PASS STORAGEEVENT should be an alias for StorageEvent. 
PASS createEvent('STORAGEEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "StorageEvents" 
PASS SVGEvents should be an alias for Event. 
PASS createEvent('SVGEvents') should be initialized correctly. 
PASS svgevents should be an alias for Event. 
PASS createEvent('svgevents') should be initialized correctly. 
PASS SVGEVENTS should be an alias for Event. 
PASS createEvent('SVGEVENTS') should be initialized correctly. 
FAIL TextEvent should be an alias for CompositionEvent. assert_equals: expected object "[object CompositionEvent]" but got object "[object TextEvent]"
PASS createEvent('TextEvent') should be initialized correctly. 
FAIL textevent should be an alias for CompositionEvent. assert_equals: expected object "[object CompositionEvent]" but got object "[object TextEvent]"
PASS createEvent('textevent') should be initialized correctly. 
FAIL TEXTEVENT should be an alias for CompositionEvent. assert_equals: expected object "[object CompositionEvent]" but got object "[object TextEvent]"
PASS createEvent('TEXTEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "TextEvents" 
PASS TouchEvent should be an alias for TouchEvent. 
PASS createEvent('TouchEvent') should be initialized correctly. 
PASS touchevent should be an alias for TouchEvent. 
PASS createEvent('touchevent') should be initialized correctly. 
PASS TOUCHEVENT should be an alias for TouchEvent. 
PASS createEvent('TOUCHEVENT') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "TouchEvents" 
PASS UIEvent should be an alias for UIEvent. 
PASS createEvent('UIEvent') should be initialized correctly. 
PASS uievent should be an alias for UIEvent. 
PASS createEvent('uievent') should be initialized correctly. 
PASS UIEVENT should be an alias for UIEvent. 
PASS createEvent('UIEVENT') should be initialized correctly. 
PASS UIEvents should be an alias for UIEvent. 
PASS createEvent('UIEvents') should be initialized correctly. 
PASS uievents should be an alias for UIEvent. 
PASS createEvent('uievents') should be initialized correctly. 
PASS UIEVENTS should be an alias for UIEvent. 
PASS createEvent('UIEVENTS') should be initialized correctly. 
PASS Should throw NOT_SUPPORTED_ERR for unrecognized arguments 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "AnimationEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "AnimationEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "AnimationPlaybackEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "AnimationPlaybackEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "AnimationPlayerEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "AnimationPlayerEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ApplicationCacheErrorEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ApplicationCacheErrorEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "AudioProcessingEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "AudioProcessingEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "AutocompleteErrorEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "AutocompleteErrorEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "BeforeInstallPromptEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "BeforeInstallPromptEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "BlobEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "BlobEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ClipboardEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ClipboardEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "CloseEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "CloseEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "CommandEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "CommandEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "DataContainerEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "DataContainerEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ErrorEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ErrorEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ExtendableEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ExtendableEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ExtendableMessageEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ExtendableMessageEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "FetchEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "FetchEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "FontFaceSetLoadEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "FontFaceSetLoadEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "GamepadEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "GamepadEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "GeofencingEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "GeofencingEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "IDBVersionChangeEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "IDBVersionChangeEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "InstallEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "InstallEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "KeyEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "KeyEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MIDIConnectionEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MIDIConnectionEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MIDIMessageEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MIDIMessageEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MediaEncryptedEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MediaEncryptedEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MediaKeyEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MediaKeyEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MediaKeyMessageEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MediaKeyMessageEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MediaQueryListEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MediaQueryListEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MediaStreamEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MediaStreamEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MediaStreamTrackEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MediaStreamTrackEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MouseScrollEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MouseScrollEvents" 
FAIL Should throw NOT_SUPPORTED_ERR for non-legacy event interface "MutationEvent" assert_throws_dom: function "function () {
      var evt = document.createEvent(eventInterface);
    }" did not throw
FAIL Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "MutationEvents" assert_throws_dom: function "function () {
        var evt = document.createEvent(eventInterface + "s");
      }" did not throw
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "NotificationEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "NotificationEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "NotifyPaintEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "NotifyPaintEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "OfflineAudioCompletionEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "OfflineAudioCompletionEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "OrientationEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "OrientationEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PageTransition" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PageTransitions" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PageTransitionEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PageTransitionEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PointerEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PointerEvents" 
FAIL Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PopStateEvent" assert_throws_dom: function "function () {
      var evt = document.createEvent(eventInterface);
    }" did not throw
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PopStateEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PopUpEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PopUpEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PresentationConnectionAvailableEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PresentationConnectionAvailableEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PresentationConnectionCloseEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PresentationConnectionCloseEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ProgressEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ProgressEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PromiseRejectionEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PromiseRejectionEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "PushEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "PushEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "RTCDTMFToneChangeEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "RTCDTMFToneChangeEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "RTCDataChannelEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "RTCDataChannelEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "RTCIceCandidateEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "RTCIceCandidateEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "RelatedEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "RelatedEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ResourceProgressEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ResourceProgressEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "SVGEvent" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "SVGZoomEvent" 
FAIL Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "SVGZoomEvents" assert_throws_dom: function "function () {
        var evt = document.createEvent(eventInterface + "s");
      }" did not throw
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ScrollAreaEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ScrollAreaEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "SecurityPolicyViolationEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "SecurityPolicyViolationEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ServicePortConnectEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ServicePortConnectEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "ServiceWorkerMessageEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "ServiceWorkerMessageEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "SimpleGestureEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "SimpleGestureEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "SpeechRecognitionError" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "SpeechRecognitionErrors" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "SpeechRecognitionEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "SpeechRecognitionEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "SpeechSynthesisEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "SpeechSynthesisEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "SyncEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "SyncEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "TimeEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "TimeEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "TrackEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "TrackEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "TransitionEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "TransitionEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "WebGLContextEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "WebGLContextEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "WebKitAnimationEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "WebKitAnimationEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "WebKitTransitionEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "WebKitTransitionEvents" 
FAIL Should throw NOT_SUPPORTED_ERR for non-legacy event interface "WheelEvent" assert_throws_dom: function "function () {
      var evt = document.createEvent(eventInterface);
    }" did not throw
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "WheelEvents" 
PASS Should throw NOT_SUPPORTED_ERR for non-legacy event interface "XULCommandEvent" 
PASS Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "XULCommandEvents"