main frame - didStartProvisionalLoadForFrame
main frame - didCommitLoadForFrame
main frame - didFinishDocumentLoadForFrame
main frame - didHandleOnloadEventsForFrame
main frame - didFinishLoadForFrame
PASS internals.isPreloaded('resources/base-image1.png'); is true
PASS internals.isPreloaded('resources/base-image2.png'); is true
PASS internals.isPreloaded('resources/base-image3.png'); is false
PASS successfullyParsed is true

TEST COMPLETE
This test passes if the image (defined in the src attribute) is preloaded.